Q. What is this, water frozen hard?
Options: Snowflake · Ice · Water · Frost
Answer: Ice
When water gets colder than 0°C, it freezes into hard ice.
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Solids, liquids, gases, and materials — answers and explanations for all 200 questions. Cover the answer, have a guess first, then check the explanation. Want to play it as a quiz? Try it at the Quiz Playground!
🧊 Q. What does water become when it freezes solid?
Options: Water vapor · Cloud · Frost · Ice
Answer: Ice
When water freezes, it becomes hard 'ice'.
💧 Q. What does ice become when it melts?
Options: Water · Fire · Steam · Air
Answer: Water
Melted ice becomes 'water' again.
♨️ Q. What is the white steam rising from boiling water?
Options: Water vapor · Smoke · Dust · Cloud
Answer: Water vapor
The steam from boiling water is 'water vapor'.
🌫️ Q. The three states of matter are solid, liquid, and what?
Options: Sound · Light · Shadow · Gas
Answer: Gas
Matter exists as solid, liquid, and gas.
🥤 Q. What is it called when sugar disappears as you stir it into water?
Options: Boiling · Freezing · Dissolving · Burning
Answer: Dissolving
Sugar mixing evenly into water is called 'dissolving'.
🔩 Q. What do we call it when old iron things turn red?
Options: Rust · Dust · Ice · Bubbles
Answer: Rust
Iron turning red when it meets water and air is called 'rust'.
💨 Q. What do we call a liquid turning into a gas?
Options: Cooling · Melting · Condensation · Evaporation
Answer: Evaporation
A liquid becoming a gas is called 'evaporation'.
🌧️ Q. What do we call water vapor cooling into water droplets?
Options: Condensation · Sublimation · Evaporation · Melting
Answer: Condensation
A gas cooling into a liquid is called 'condensation'.
🧂 Q. What's left when you leave salt water out until the water evaporates?
Options: Water · Sugar · Salt · Sand
Answer: Salt
Only the water evaporates, and the 'salt' stays behind.
❄️ Q. What is it called when dry ice turns straight into gas without becoming water?
Options: Sublimation · Condensation · Evaporation · Dissolving
Answer: Sublimation
A solid becoming a gas without a liquid stage is called 'sublimation'.
Q. Which state has a fixed shape and size, and you can hold it?
Options: Liquid · Solid · Gas · Light
Answer: Solid
Rocks, wood, and ice are solids.
Q. Which state changes shape to fit its container and flows?
Options: Liquid · Solid · Gas · Fire
Answer: Liquid
Water and milk are liquids.
Q. Which state is hard to see and spreads everywhere?
Options: Solid · Rock · Gas · Liquid
Answer: Gas
Air and water vapor are gases.
Q. Which of these is NOT a solid?
Options: Desk · Rock · Ice · Water
Answer: Water
Water! A solid has a fixed shape, but water changes shape to fit its container — it's a liquid.
Q. Which of these is a liquid?
Options: Ice · Glass cup · Milk · Air
Answer: Milk
Milk! A liquid flows into the shape of its container but keeps the same amount (volume).
Q. Which of these is a gas?
Options: Ice · Wood · Water · Air
Answer: Air
Air! You can't see a gas, but it fills any empty space and spreads freely.
Q. What happens to water's volume when it freezes into ice?
Options: It shrinks · No change · It grows · It disappears
Answer: It grows
Water expands when it freezes! (That's why bottles can crack.)
Q. What do we call a liquid turning into a solid?
Options: Burning · Boiling · Freezing · Melting
Answer: Freezing
Water → ice, freezing!
Q. What do we call a solid turning into a liquid?
Options: Evaporating · Melting · Burning · Freezing
Answer: Melting
Ice → water, melting!
Q. What do we call a liquid actively turning to gas as it boils?
Options: Freezing · Melting · Condensation · Boiling
Answer: Boiling
Bubbling water turns into water vapor!
Q. What do we call a liquid slowly turning to gas at its surface?
Options: Evaporation · Condensation · Melting · Freezing
Answer: Evaporation
Laundry drying is evaporation!
Q. What do we call gas (water vapor) cooling into a liquid?
Options: Condensation · Sublimation · Evaporation · Melting
Answer: Condensation
Droplets forming on a cold cup — condensation!
Q. What do we call a solid turning straight into a gas without melting?
Options: Melting · Evaporation · Sublimation · Condensation
Answer: Sublimation
Dry ice and mothballs sublimate!
Q. Dew forming on grass at dawn — what is that?
Options: Melting · Sublimation · Condensation · Evaporation
Answer: Condensation
Water vapor in the air condensed!
Q. What causes fog on the inside of a window in winter?
Options: Sublimation · Condensation · Melting · Evaporation
Answer: Condensation
Warm indoor vapor condenses on the cold glass!
Q. What weather dries laundry best?
Options: Foggy days · Damp cold days · Rainy days · Hot, clear, breezy days
Answer: Hot, clear, breezy days
Hot, dry, and windy makes water evaporate fast!
Q. At what temperature does water start to boil?
Options: 37°C · 50°C · 100°C · 0°C
Answer: 100°C
At normal air pressure, water boils at 100°C.
Q. At what temperature does water start to freeze?
Options: 0°C · 100°C · -100°C · 10°C
Answer: 0°C
Water freezes at 0°C.
Q. What do we call two or more things mixed together?
Options: A solid · An element · A mixture · A pure substance
Answer: A mixture
Like a salad or a sandwich — a mixture!
Q. What do we call it when salt disappears as you stir it into water?
Options: Freezing · Boiling · Burning · Dissolving
Answer: Dissolving
The salt dissolves in the water.
Q. What do we call something clear and evenly mixed, like salt in water?
Options: A solution · A solid · Dust · A gas
Answer: A solution
Sugar water and salt water are solutions.
Q. What's left when you evaporate the water from salt water?
Options: Ice · Salt · Sand · Sugar
Answer: Salt
Only the water flies away, and the salt stays!
Q. What happens if you mix water and oil?
Options: They mix completely · They disappear · They separate into layers · They freeze
Answer: They separate into layers
Oil floats on water, making layers.
Q. What's a good way to separate iron filings mixed with sand?
Options: Pick them out one by one · Use a magnet to pull out the iron · Burn them · Dissolve them in water
Answer: Use a magnet to pull out the iron
Only the iron sticks to the magnet!
Q. What tool is good for separating beans mixed with millet?
Options: A magnet · A scale · A sieve · A magnifying glass
Answer: A sieve
Use a sieve with the right hole size!
Q. How do you get clear water from muddy water?
Options: Boil it · Let it settle, then filter it · Shake it · Freeze it
Answer: Let it settle, then filter it
Let the dirt settle, then filter with filter paper!
Q. What do we call a place that gets salt from seawater?
Options: A field · A salt farm (salt pan) · An orchard · A rice paddy
Answer: A salt farm (salt pan)
A salt pan uses sun and wind to evaporate the water!
Q. Which material sticks to a magnet?
Options: Wood · Glass · Iron · Paper
Answer: Iron
Metals like iron and nickel stick.
Q. Which does NOT stick to a magnet?
Options: Scissor blades · Steel clip · Plastic ruler · Iron nail
Answer: Plastic ruler
Plastic doesn't stick to magnets!
Q. Which material carries heat well?
Options: Wood · Rubber · Plastic · Metal
Answer: Metal
A metal spoon heats up right away!
Q. Why are hot pot handles made of wood or plastic?
Options: They're cheap · They don't carry heat well · They're light · They're pretty
Answer: They don't carry heat well
They block heat so you don't burn your hand!
Q. Which material carries electricity well?
Options: Rubber · Wood · Glass · Copper (metal)
Answer: Copper (metal)
The inside of a wire is made of copper!
Q. Why are wires wrapped in rubber or plastic?
Options: To add color · To keep electricity from leaking · To make them heavier · To remove smells
Answer: To keep electricity from leaking
Rubber blocks electricity to keep us safe!
Q. What's true about materials that float on water?
Options: They're lighter than water (less dense) · They're heavier than water · They're cold · They're made of iron
Answer: They're lighter than water (less dense)
Wood and styrofoam float!
Q. Which of these sinks in water?
Options: Empty plastic bottle · Iron nail · Styrofoam · Wood
Answer: Iron nail
An iron nail! Anything heavier than the same amount of water sinks — big steel ships float because they're hollow and light.
Q. Which describes rubber?
Options: It dissolves in water · It stretches and bounces · It breaks easily · It's hard as iron
Answer: It stretches and bounces
That's why a rubber ball bounces!
Q. Which describes glass?
Options: It sticks to magnets · It's clear and breaks easily · It dissolves in water · It stretches
Answer: It's clear and breaks easily
It's clear, but easy to break!
Q. What do we call the stuff an object is made of?
Options: Weight · Temperature · Material · Color
Answer: Material
A wooden desk's material is 'wood'!
Q. The same cup can be glass, plastic, or paper. What is different?
Options: Its shape · Its name · Its material · Its use
Answer: Its material
Same use, different material!
Q. What is iron turning red with rust connected to?
Options: Only wind · Sound · Only sunlight · Oxygen in the air and water
Answer: Oxygen in the air and water
Oxygen plus water makes rust!
Q. How can you keep iron from rusting?
Options: Just leave it · Soak it in water · Paint it or coat it with oil · Sprinkle salt on it
Answer: Paint it or coat it with oil
Block the air and water to prevent rust!
Q. What do we call sour things like lemons and vinegar?
Options: Neutral · Basic · Solid · Acidic
Answer: Acidic
Sour means acidic!
Q. What kind of substance is slippery, like soap and detergent?
Options: Basic · Gas · Neutral · Acidic
Answer: Basic
Slippery means basic!
Q. Which does NOT help sugar dissolve faster in water?
Options: Put it in warm water · Stir it · Crush it small · Add ice
Answer: Add ice
Cold makes it dissolve slower! Warmer is faster.
Q. What water temperature helps sugar dissolve best?
Options: Warmer dissolves better · Colder dissolves better · It must be frozen · Temperature doesn't matter
Answer: Warmer dissolves better
Sugar zips away in warm water!
Q. Which does NOT dissolve in water?
Options: Sand · Salt · Sugar · Honey
Answer: Sand
Sand! Sugar and salt scatter invisibly in water, but sand just stays and sinks.
Q. Which gas fizzes up out of a soda?
Options: Carbon dioxide · Oxygen · Hydrogen · Nitrogen
Answer: Carbon dioxide
Carbon dioxide! It's dissolved in under high pressure, and opening the cap releases it as tiny fizzing bubbles.
Q. What do we call a change into a new substance, like paper burning to ash?
Options: A change of state · A color-only change · A change of place · A chemical change
Answer: A chemical change
Once burned, it can't turn back into paper!
Q. Water becoming ice and then water again is what kind of change?
Options: A change of state (reversible) · A chemical change · Turning to ash · Disappearing
Answer: A change of state (reversible)
Only the form changes — the substance stays the same!
Q. What does wood become when it burns?
Options: Ash and smoke · Iron · Water · Wood again
Answer: Ash and smoke
Burning makes ash and smoke, and gives off heat!
Q. Which is NOT needed for something to burn?
Options: Water · Oxygen · Something to burn · High temperature
Answer: Water
Fuel, oxygen, and heat are needed. Water puts fires out!
Q. Which is NOT a way to put out a fire?
Options: Cover it to block oxygen · Spray water · Remove what's burning · Give it more oxygen
Answer: Give it more oxygen
More oxygen makes it burn better!
Q. What makes a peeled apple change color?
Options: It dissolves in water · It freezes · It makes a sound · It reacts with the air
Answer: It reacts with the air
Oxygen in the air turns it brown!
Q. Milk going sour and lumpy is what kind of change?
Options: No change · A chemical change (spoiling) · A change of place · A change of state
Answer: A chemical change (spoiling)
Microbes make the milk spoil!
Q. Why does egg white harden when you boil an egg?
Options: It evaporates · Heat changes it (and it can't go back) · It melts · It freezes
Answer: Heat changes it (and it can't go back)
Once cooked, it can't become a raw egg again!
Q. Bending a wire is what kind of change?
Options: A shape-only change · A melting change · A change into a new substance · A change into ash
Answer: A shape-only change
The iron stays the same — only the shape changes!
Q. What shows you that air exists?
Options: Water flows · Rocks are hard · Wind blows and balloons inflate · Fire is hot
Answer: Wind blows and balloons inflate
You can't see it, but air is there!
Q. Which gas makes up most of the air?
Options: Hydrogen · Oxygen · Nitrogen · Carbon dioxide
Answer: Nitrogen
About 78% of air is nitrogen!
Q. Which gas in the air do we need to breathe?
Options: Oxygen · Water vapor · Nitrogen · Carbon dioxide
Answer: Oxygen
Oxygen! It's about 21% of the air — the most common is nitrogen at 78%.
Q. Why does a balloon get big when you blow it up?
Options: Sound goes in · Water goes in · Light goes in · Air goes in
Answer: Air goes in
Air fills the balloon!
Q. Does air have weight?
Options: Yes · No
Answer: Yes
Air has a very small weight too!
Q. What does warm air do?
Options: Only moves sideways · Sinks down · Rises up · Stays still
Answer: Rises up
Warm air is light and rises! (That's how hot-air balloons work.)
Q. What does cold air do?
Options: Freezes · Disappears · Rises up · Sinks down
Answer: Sinks down
Cold air is heavy and sinks!
Q. Which tool measures temperature?
Options: A ruler · A thermometer · A clock · A scale
Answer: A thermometer
A thermometer! The liquid inside expands when warm and shrinks when cold, and you read it on the scale.
Q. What happens to the temperature if you pour cold water into hot water?
Options: It boils · It becomes lukewarm · It gets hotter · It freezes
Answer: It becomes lukewarm
Heat moves until the temperatures even out!
Q. Which way does heat move?
Options: Only up · From hot places to cold places · It doesn't move · From cold places to hot places
Answer: From hot places to cold places
Warmth spreads toward the cold side!
Q. What kind of heat movement makes the far end of a metal rod hot?
Options: Convection · Evaporation · Conduction · Radiation
Answer: Conduction
Conduction — heat traveling through a solid!
Q. When boiling water, what heat movement makes water circle up and down?
Options: Convection · Conduction · Condensation · Radiation
Answer: Convection
Convection — liquids and gases warming as they circle!
Q. What heat movement brings the sun's warmth even without air?
Options: Conduction · Melting · Convection · Radiation
Answer: Radiation
The sun's heat reaches Earth by radiation!
Q. What happens to an object's size when you heat it?
Options: No change · It shrinks · It gets slightly bigger (expands) · It disappears
Answer: It gets slightly bigger (expands)
Heat makes it expand! (That's why bridges have gaps.)
Q. Why do power lines sag in summer?
Options: Birds sit on them · Heat makes them expand · Because of rain · They get heavier
Answer: Heat makes them expand
They took in heat and expanded!
Q. What does sound travel through?
Options: Air, water, and objects · Light · Temperature · Smell
Answer: Air, water, and objects
Sound is a vibration traveling through air and other things!
Q. Why can't you hear sound in space (a vacuum)?
Options: It's cold · There's no light · There's no air to carry the sound · It's too far
Answer: There's no air to carry the sound
Without air, sound can't travel!
Q. What do all sound-making objects have in common?
Options: They vibrate · They're hot · They shine · They're cold
Answer: They vibrate
Drums and guitar strings vibrate to make sound!
Q. What is it called when light bends as it enters water?
Options: Absorption · Refraction · Evaporation · Reflection
Answer: Refraction
A straw in water looks bent!
Q. Seeing yourself in a mirror shows which property of light?
Options: Refraction · Passing through · Reflection · Absorption
Answer: Reflection
Reflection — light bouncing back!
Q. Why are black clothes hotter than white ones?
Options: They're lighter · They're thinner · They're prettier · They absorb more light (heat)
Answer: They absorb more light (heat)
Black absorbs a lot of sunlight!
Q. Why do droplets form on the outside of a cup of ice?
Options: Your hand sweats · The ice melted and spilled over · The cup leaks · Water vapor in the air condenses
Answer: Water vapor in the air condenses
Vapor condenses on the cold cup!
Q. Why does a hairdryer dry wet hair faster?
Options: Because of the sound · Your head gets bigger · Warm air speeds up evaporation · The water freezes
Answer: Warm air speeds up evaporation
Heat and wind make evaporation quick!
Q. Why does ice left in the freezer get smaller?
Options: It slowly sublimates into gas · It drinks water · It melts · It freezes
Answer: It slowly sublimates into gas
Even when cold, ice sublimates and shrinks!
Q. Why does steam rise from a kettle on the stove?
Options: The fire is burning · The water froze · It's smoke · Boiling water becomes vapor that cools into steam
Answer: Boiling water becomes vapor that cools into steam
Vapor cools in the air into steam (tiny droplets)!
Q. What happens to water's boiling point when you add salt while cooking?
Options: No change · It drops · It becomes 0°C · It rises a little
Answer: It rises a little
Salt water boils a bit above 100°C!
Q. What does the road salt spread in winter do?
Options: Freezes the road · Removes dust · Adds a smell · Helps snow and ice melt
Answer: Helps snow and ice melt
It lowers the freezing point so the ice melts!
Q. Which of these is NOT a change of state?
Options: Vapor condensing · Paper burning to ash · Water boiling · Ice melting
Answer: Paper burning to ash
Burning creates a new substance — that's a chemical change!
Q. Which of these is closest to a pure substance (one single material)?
Options: Salad · Distilled (clean) water · A sandwich · Muddy water
Answer: Distilled (clean) water
The others are mixtures of many things!
Q. What are objects made of?
Options: Very tiny bits (particles) · Light · Temperature · Sound
Answer: Very tiny bits (particles)
Tiny bits you can't see, gathered together!
Q. What's special about gas particles?
Options: They're packed tight · They spread out freely and far · They don't move · They line up in rows
Answer: They spread out freely and far
Gas particles are the freest of all!
Q. What's special about solid particles?
Options: They fly around freely · They disappear · They flow like water · They pack in tight and hold their places
Answer: They pack in tight and hold their places
In a solid, particles stick close so the shape stays fixed!
Q. Why can you smell perfume from far away?
Options: It travels by sound · It travels by water · It travels by light · The scent particles spread through the air (diffusion)
Answer: The scent particles spread through the air (diffusion)
Gas particles spreading out is diffusion!
Q. What happens when you drop ink into water?
Options: It clumps in one spot · It freezes · It sinks · It spreads on its own and colors the water
Answer: It spreads on its own and colors the water
Particles spreading out — that's diffusion!
Q. What is this, water frozen hard?
Options: Snowflake · Ice · Water · Frost
Answer: Ice
When water gets colder than 0°C, it freezes into hard ice.
Q. What is this pointy thing of frozen water hanging from a roof edge?
Options: Icicle · Fog · Dew · Window frost
Answer: Icicle
Melted water drips down and freezes, forming an icicle.
Q. What is this that falls from the sky in hexagon patterns?
Options: Ice · Frost · Snowflake · Water vapor
Answer: Snowflake
A snowflake is a crystal formed as water freezes in the sky — usually a hexagon.
Q. What is this white coating on grass on a cold morning?
Options: Frost · Water droplet · Icicle · Water vapor
Answer: Frost
Frost is water vapor in the air freezing onto a cold surface.
Q. What do we call these small droplets on grass at dawn?
Options: Water vapor · Water droplets · Frost · Dew
Answer: Dew
Dew is water vapor in the air cooling into droplets.
Q. What is this, puffing out of a kettle of boiling water?
Options: Water vapor · Fog · Icicle · Dew
Answer: Water vapor
When water boils, it becomes water vapor — a gas — and rises.
Q. What is this, beading up round on a leaf or glass?
Options: Water droplet · Window frost · Snowflake · Steam
Answer: Water droplet
Water pulls itself into round droplets because of surface tension.
Q. What is this frozen carbon dioxide that turns straight to smoke without melting?
Options: Salt · Dry ice · Snow · Ice
Answer: Dry ice
Dry ice is amazing — it becomes a gas without ever turning liquid (sublimation).
Q. What is this rainbow-colored thing made from soapy water?
Options: Soap bubble · Flame · Water droplet · Foam
Answer: Soap bubble
A soap bubble is a thin soap film around air, shining rainbow colors in the light.
Q. What is this fizzy stuff that appears when you rub soap?
Options: Soap bubble · Foam · Steam · Water droplet
Answer: Foam
Foam is lots of tiny bubbles of air trapped in a liquid.
Q. What is this that burns brightly when you light its wick?
Options: Coal · Candle · Charcoal · Firewood
Answer: Candle
A candle's wax melts with heat and burns up the wick, giving light.
Q. What is this that rises up when something burns?
Options: Foam · Smoke · Soap bubble · Water droplet
Answer: Smoke
Smoke is a mix of tiny bits and gases made when something burns.
Q. What are these ice patterns frozen on a cold window in winter?
Options: Window frost · Water vapor · Steam · Ice
Answer: Window frost
Window frost is ice crystals formed as vapor freezes on cold glass.
Q. What do we call a huge chunk of ice floating in the sea?
Options: Mountain · Iceberg · Ice · Cloud
Answer: Iceberg
An iceberg is huge ice floating at sea, with far more hidden below the water than above.
Q. What do we call this — ice warming and turning into water?
Options: Frost · Melting ice · Water vapor · Icicle
Answer: Melting ice
Solid ice taking in heat and becoming liquid water is called 'melting'.
Q. What is this that piles up white from the sky in winter?
Options: Water · Window frost · Snow · Steam
Answer: Snow
Snow is piled-up ice crystals made when water vapor freezes in the sky.
Q. What is this clear liquid in the cup?
Options: Water · Honey · Vinegar · Oil
Answer: Water
Water is the classic liquid — it changes shape to fit its container.
Q. What are these air bubbles rising up through water?
Options: Bubbles · Water droplets · Steam · Soap bubbles
Answer: Bubbles
Air in the water forms bubbles that are light, so they float upward.
Q. What is this precious yellow metal that shines and never tarnishes?
Options: Iron · Gold · Tin · Steel
Answer: Gold
Gold doesn't rust and stays shiny, so it's used as a precious metal.
Q. What is this bright white metal used in spoons and jewelry?
Options: Aluminum · Gold · Tin · Silver
Answer: Silver
Silver shines white and carries heat and electricity very well.
Q. What is this reddish metal used a lot in electrical wires?
Options: Copper · Aluminum · Silver · Tin
Answer: Copper
Copper is reddish and conducts electricity well, so it's used in wires.
Q. What is this most widely used metal that sticks to magnets?
Options: Copper · Iron · Lead · Silver
Answer: Iron
Iron is strong and cheap, so it's the most-used metal in buildings and machines.
Q. What is this red stuff that forms when iron meets water and air?
Options: Moss · Rust · Grime · Mold
Answer: Rust
When iron meets water and oxygen in the air, it turns red with rust and weakens.
Q. What is this light silvery metal often used for cans?
Options: Iron · Bronze · Aluminum · Steel
Answer: Aluminum
Aluminum is very light, so it's used for drink cans and airplanes.
Q. What is this metal, a stronger form of iron, used in pots and buildings?
Options: Aluminum · Tin · Silver · Steel
Answer: Steel
Steel is iron mixed with other things to make it much stronger.
Q. What is this red metal thread inside wires that carries electricity well?
Options: Copper wire · Thread · Fishing line · Rubber band
Answer: Copper wire
Copper conducts electricity well, so copper wire is inside electrical cords.
Q. What is this shiny thin metal sheet used to wrap food?
Options: Aluminum foil · Silver paper · Cloth · Plastic wrap
Answer: Aluminum foil
Foil is aluminum rolled super thin, used to wrap food.
Q. What is this round money made of metal?
Options: Button · Badge · Marble · Coin
Answer: Coin
Coins are made of metals like copper and nickel so they don't wear out easily.
Q. What material is used to make furniture and paper?
Options: Plastic · Styrofoam · Wood · Silk
Answer: Wood
Wood comes from nature and is used for furniture, pencils, and paper.
Q. What clear material is used for windows and cups?
Options: Leather · Styrofoam · Glass · Ceramic
Answer: Glass
Glass is made by melting sand at high heat — it's clear but breaks easily.
Q. What light, hard-to-break material is used for bottles and toys?
Options: Rubber · Rubber band · Leather · Plastic
Answer: Plastic
Plastic is light and easy to shape, but it doesn't rot, so recycling matters.
Q. What material stretches well and is springy?
Options: Ceramic · Glass · Rubber · Wood
Answer: Rubber
Rubber stretches and springs back, so it's used in tires and erasers.
Q. What thin material do we write on and make books from?
Options: Paper · Styrofoam · Ceramic · Concrete
Answer: Paper
Paper is made by breaking wood into tiny fibers — you can write on it and fold it.
Q. What material is woven from thread to make clothes?
Options: Styrofoam · Paper · Cloth · Rubber
Answer: Cloth
Cloth (fabric) is made by weaving fine threads tightly together.
Q. What material made from animal hide is used for shoes and bags?
Options: Brick · Silk · Leather · Paper
Answer: Leather
Leather is made from animal hide, making it tough and long-lasting.
Q. What shiny fabric is woven from silkworm cocoon thread?
Options: Paper · Cloth · Silk · Cotton
Answer: Silk
Silk is woven from the thread of silkworm cocoons — soft and glossy.
Q. What dish material is made by shaping clay and firing it?
Options: Brick · Ceramic · Paper · Glass
Answer: Ceramic
Ceramic is clay shaped and baked in a hot kiln until it's hard.
Q. What square material, baked from clay, is used to build houses?
Options: Rubber band · Concrete · Paper · Brick
Answer: Brick
A brick is a hard block baked from clay, stacked up to build houses.
Q. What gray material hardens to build buildings and roads?
Options: Concrete · Stone · Boulder · Cement
Answer: Concrete
Concrete is cement mixed with sand, gravel, and water, hardened until solid.
Q. What light, squishy white material is used a lot for packing?
Options: Plastic · Paper · Styrofoam · Cotton
Answer: Styrofoam
Styrofoam is very light and absorbs bumps, so it's used to pack things.
Q. What light, springy material is used for wine bottle stoppers?
Options: Cork · Paper · Plastic · Rubber
Answer: Cork
Cork comes from the bark of the cork oak — it's light and floats well.
Q. What stretchy thing snaps back and is used to tie things?
Options: Copper wire · String · Wire · Rubber band
Answer: Rubber band
A rubber band is made of rubber, so it stretches and springs back.
Q. What rubber thing goes around a car's wheel?
Options: Rubber · Wheel · Tire · Rubber band
Answer: Tire
A tire is made of tough rubber that grips the road so the car can roll.
Q. What rubber object erases pencil writing?
Options: Chalk · Eraser · Rubber · Sponge
Answer: Eraser
An eraser is made of rubber or plastic and rubs away pencil marks.
Q. What object soaks up water well and is full of holes?
Options: Cotton · Sponge · Styrofoam · Eraser
Answer: Sponge
A sponge has lots of holes that soak up water for washing and cleaning.
Q. What is this soft, fluffy white material?
Options: Cloud · Cotton · Cloth · Yarn
Answer: Cotton
Cotton is soft and warm, so it's stuffed inside blankets and clothes.
Q. What thread made from sheep's wool is used for knitting?
Options: Rubber band · Cotton · Yarn (wool) · Cloth
Answer: Yarn (wool)
Wool yarn is made from sheep's hair and is warm, so it's knitted into winter clothes.
Q. What coloring tool is made of wax for drawing?
Options: Crayon · Marker · Pastel · Paint
Answer: Crayon
A crayon is colored wax that leaves color when you rub it on paper.
Q. What white stick is used to write on a blackboard?
Options: Chalk · Pastel · Crayon · Paint
Answer: Chalk
Chalk is made of gypsum or calcium carbonate and leaves powder on the board.
Q. What soft earth is shaped into pots on a potter's wheel?
Options: Modeling clay · Clay · Soap · Sand
Answer: Clay
Clay is soft when wet, easy to shape, and turns hard when fired.
Q. What tiny grains cover beaches and deserts?
Options: Sand · Flour · Salt · Sugar
Answer: Sand
Sand is tiny bits of rock broken down into small grains.
Q. What white grains add a salty taste to food?
Options: Salt · Baking soda · Sugar · Powder
Answer: Salt
Salt is a salty substance from dried seawater or salt mines.
Q. What white grains add a sweet taste to food?
Options: Salt · Flour · Sugar · Powder
Answer: Sugar
Sugar is a sweet substance made from sugarcane or sugar beets.
Q. What white powder is used to make bread and noodles?
Options: Baking soda · Sugar · Flour · Sand
Answer: Flour
Flour is finely ground wheat, used for bread, cookies, and noodles.
Q. What is this hardest, most sparkling gem in the world?
Options: Quartz · Ruby · Graphite · Diamond
Answer: Diamond
Diamond is the hardest mineral, made from carbon pressed for ages.
Q. What mineral grows as clear, pointed crystals?
Options: Graphite · Emerald · Ruby · Quartz
Answer: Quartz
Quartz grows as clear crystals and is even used in watches.
Q. What gem mineral shines purple?
Options: Diamond · Quartz · Amethyst · Emerald
Answer: Amethyst
Amethyst is purple quartz, used as a beautiful gem.
Q. What gem shines red?
Options: Emerald · Quartz · Ruby · Amethyst
Answer: Ruby
A ruby is a hard gem that shines a deep red.
Q. What gem shines green?
Options: Amethyst · Diamond · Graphite · Emerald
Answer: Emerald
An emerald is a precious gem shining a clear green.
Q. What soft black mineral is used to make pencil lead?
Options: Diamond · Stone · Ink · Graphite
Answer: Graphite
Graphite makes pencil lead. It's made of carbon just like diamond, but it's very soft.
Q. What slippery liquid doesn't mix with water and floats on top?
Options: Ink · Honey · Water · Oil
Answer: Oil
Oil is lighter than water, so it floats and doesn't mix with it.
Q. What white liquid comes from cows?
Options: Milk · Oil · Ink · Water
Answer: Milk
Milk is a creamy white liquid full of calcium that builds strong bones.
Q. What sticky, sweet liquid do honeybees gather?
Options: Oil · Milk · Water · Honey
Answer: Honey
Honey is the sticky sweet liquid bees make from flower nectar.
Q. What colored liquid goes in pens and printers to write?
Options: Ink · Oil · Honey · Water
Answer: Ink
Ink is a colored liquid that leaves words and pictures from a pen or printer.
Q. What black lump, made by baking wood, burns well?
Options: Candle · Coal · Charcoal · Firewood
Answer: Charcoal
Charcoal is wood baked without air, so it burns long without smoke.
Q. What black rock is dug from the ground and used as fuel?
Options: Charcoal · Candle · Coal · Firewood
Answer: Coal
Coal is fuel formed from ancient plants buried underground for ages.
Q. What makes bubbles and washes away grime when rubbed with water?
Options: Candle · Soap · Toothpaste · Butter
Answer: Soap
Soap helps greasy grime wash away with water, cleaning your hands and body.
Q. What do bees use to build honeycomb, and what are candles made of?
Options: Beeswax · Butter · Rubber · Tree sap
Answer: Beeswax
Beeswax is made by honeybees and is used for candles and cosmetics.
Q. What stores electricity to power machines?
Options: Medicine · Battery · Charger · Magnet
Answer: Battery
A battery stores electricity and powers toys and remote controls.
Q. What rubber object do you blow air into to inflate?
Options: Kite · Balloon · Soap bubble · Ball
Answer: Balloon
A balloon is thin rubber that puffs up big when filled with air or gas.
Q. What object pulls metal things toward it?
Options: Horseshoe · Magnet · Clip · Iron
Answer: Magnet
A magnet has a force (magnetism) that pulls metals like iron toward it.
Q. What glass cup measures liquids for experiments?
Options: Microscope · Tongs · Beaker · Petri dish
Answer: Beaker
A beaker is a glass cup with markings to hold and measure liquids.
Q. What triangular lab tool has a wide bottom and narrow mouth?
Options: Microscope · Erlenmeyer flask · Watch glass · Mortar
Answer: Erlenmeyer flask
An Erlenmeyer flask doesn't spill easily when swirled, which is handy for experiments.
Q. What long thin glass tube holds a small amount of liquid?
Options: Test tube · Tongs · Crucible · Watch glass
Answer: Test tube
A test tube is a slim glass tube for experimenting with small amounts.
Q. What tool drips liquid a little at a time?
Options: Beaker · Microscope · Erlenmeyer flask · Dropper
Answer: Dropper
A dropper squeezes to suck up liquid and release it one drop at a time.
Q. What tool measures how hot or cold something is?
Options: Scale · Magnifying glass · Tweezers · Thermometer
Answer: Thermometer
A thermometer's red liquid or number rises as it gets warmer, showing the temperature.
Q. What tool measures how heavy something is?
Options: Scale · Prism · Magnifying glass · Magnet
Answer: Scale
A scale measures how much something weighs.
Q. What tool weighs cooking ingredients?
Options: Bathroom scale · Clock · Magnifying glass · Kitchen scale
Answer: Kitchen scale
A kitchen scale weighs ingredients accurately while cooking.
Q. What tool helps pour liquid into a narrow bottle without spilling?
Options: Test tube · Graduated cylinder · Funnel · Flask
Answer: Funnel
A funnel is wide on top and narrow below, so liquid pours neatly into small openings.
Q. What tool magnifies very tiny things?
Options: Stopwatch · Scale · Prism · Microscope
Answer: Microscope
A microscope magnifies cells and microbes too small to see with your eyes.
Q. What tool makes small print or objects look bigger?
Options: Tweezers · Thermometer · Microscope · Magnifying glass
Answer: Magnifying glass
A magnifying glass uses a bulging lens to make small things look big.
Q. What flame tool heats substances during experiments?
Options: Brazier · Heater · Lighter · Alcohol lamp
Answer: Alcohol lamp
An alcohol lamp (or Bunsen burner) heats substances in the lab.
Q. What tall marked tube measures a liquid's volume exactly?
Options: Beaker · Alcohol lamp · Watch glass · Graduated cylinder
Answer: Graduated cylinder
A graduated cylinder measures the volume of a liquid precisely.
Q. What flat dish is used to grow bacteria and mold?
Options: Petri dish · Microscope · Watch glass · Graduated cylinder
Answer: Petri dish
A Petri dish is a flat glass or plastic dish for growing and observing microbes.
Q. What tool picks up small objects?
Options: Thermometer · Tongs · Scale · Tweezers
Answer: Tweezers
Tweezers pick up small things precisely instead of using your fingers.
Q. What do you wear to protect your eyes during experiments?
Options: Safety goggles · Lens · Sunglasses · A magnifying glass
Answer: Safety goggles
Safety goggles keep your eyes safe from splashes during experiments.
Q. What smooth patterned stone is used for statues and buildings?
Options: Stone · Quartz · Marble · Concrete
Answer: Marble
Marble is hard yet easy to carve, so it's used for statues and fancy buildings.
Q. What slim glass tube measures and moves exact amounts of liquid?
Options: Syringe · Straw · Pipette · Test tube
Answer: Pipette
A pipette draws up an exact amount of liquid and moves it precisely.
Q. What tool with a bowl and a stick grinds things into powder?
Options: Cup · Mortar and pestle · Plate · A grinding stone
Answer: Mortar and pestle
You put grains in a mortar and grind them into fine powder with the pestle.
Q. What triangular glass splits sunlight into rainbow colors?
Options: Quartz · Glass · Prism · Lens
Answer: Prism
A prism splits light into many colors as it passes through, showing a rainbow.
Q. What lab tool safely grips hot objects?
Options: Tongs · Tweezers · Scissors · Pliers
Answer: Tongs
Crucible tongs grip hot objects safely without touching them.
Q. What tool measures how long something takes?
Options: Compass · Stopwatch · Thermometer · Clock
Answer: Stopwatch
A stopwatch measures exactly how long something takes from start to finish.
Q. What tool with a plunger sucks up and pushes out liquid?
Options: Dropper · Pump · Syringe · Tube
Answer: Syringe
A syringe pulls the plunger to draw liquid in and pushes to send it out.
Q. What round, long-necked flask measures an exact volume?
Options: Kettle · Erlenmeyer flask · Beaker · Volumetric flask
Answer: Volumetric flask
Fill a volumetric flask to the line on its neck and you have an exact volume.
Q. What small spoon scoops up powders bit by bit?
Options: Fork · Spatula · Tweezers · Lab spoon (spatula)
Answer: Lab spoon (spatula)
A lab spoon (spatula) scoops and moves small amounts of powder or grains.
Q. What thin glass rod stirs liquids?
Options: Thermometer · Chopstick · Lollipop · Glass rod
Answer: Glass rod
A glass rod stirs the liquid in a beaker evenly.
Q. What round, dish-shaped glass holds powder or covers a beaker?
Options: Beaker · Lens · Clock · Watch glass
Answer: Watch glass
A watch glass is a shallow glass dish that holds small amounts or covers a beaker.
Q. What container melts substances at very high heat?
Options: Crucible · Bowl · Pot · Flowerpot
Answer: Crucible
A crucible survives fire, so it holds things like metal that must melt at high heat.
Q. What paper folds into a funnel to strain bits out of a liquid?
Options: Filter paper · Sieve · Cloth · A dish cloth
Answer: Filter paper
Filter paper has tiny holes that let liquid through but catch the bits.
Q. What tool has a needle that always points north and south?
Options: Map · Thermometer · Scale · Compass
Answer: Compass
A compass needle is a magnet, so it always points north and south.