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Secrets of trees and plants — answers and explanations for all 50 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. Which tree has fan-shaped leaves that turn yellow in autumn?
Options: Ginkgo · Bamboo · Maple · Pine
Answer: Ginkgo
Ginkgo leaves turn bright yellow in autumn.
Q. Which needle-leaved tree stays green even in winter?
Options: Cherry tree · Ginkgo · Pine · Maple
Answer: Pine
The pine is an evergreen — green all four seasons.
Q. Which tree's leaves turn red in autumn?
Options: Ginkgo · Maple · Willow · Pine
Answer: Maple
The maple. When the green coloring fades, the red coloring that was hiding all along comes out.
Q. Which tree grows sweet chestnuts?
Options: Pine nut tree · Persimmon tree · Chestnut tree · Bamboo
Answer: Chestnut tree
When autumn comes, chestnut burrs drop from the chestnut tree.
Q. Which plant shoots up super fast, and pandas love it?
Options: Zelkova · Pine · Bamboo · Oak
Answer: Bamboo
Bamboo can grow tens of centimeters in a single day.
Q. Which tree grows acorns?
Options: Oak · Cherry tree · Chestnut tree · Ginkgo
Answer: Oak
Acorns are the fruit of oak trees, and squirrels love them.
Q. Which plant grows well where water is scarce, like a desert?
Options: Rice · Moss · Lotus · Cactus
Answer: Cactus
The cactus stores water in its stem, so it can live even in the desert.
Q. The rice we eat is the fruit of which plant?
Options: Barley · The rice plant · Wheat · Corn
Answer: The rice plant
Harvest the rice plant in autumn, strip off the husk, and you have rice.
🍂 Q. Which tree's leaves turn yellow in autumn, and whose fruit smells terrible?
Options: Pine · Bamboo · Camellia · Ginkgo
Answer: Ginkgo
The ginkgo, with its fan-shaped leaves!
🍁 Q. Which tree turns red in autumn and stars in the autumn-leaf season?
Options: Pine nut tree · Bamboo · Pine · Maple
Answer: Maple
The maple, with its hand-shaped leaves!
🌲 Q. Which needle-leaved tree keeps its leaves and stays green in winter?
Options: Pine · Maple · Cherry tree · Ginkgo
Answer: Pine
The pine, green all year!
🌸 Q. Which tree has pale pink flowers before its leaves in spring, green leaves in summer, and autumn color?
Options: Bamboo · Cherry tree · Pine · Pine nut tree
Answer: Cherry tree
Blossom in spring, autumn color in fall!
🍂 Q. What do you call a tree that drops all its leaves in winter?
Options: An evergreen · A vine · A grass · A deciduous tree
Answer: A deciduous tree
A deciduous tree drops its leaves in autumn!
🌲 Q. What do you call trees like pines that stay green even in winter?
Options: Deciduous trees · Annual plants · Vines · Evergreens
Answer: Evergreens
Evergreens, green all four seasons!
❄️ Q. Why does a tree drop its leaves in winter?
Options: It's bored · To survive the cold and the lack of water · To get prettier colors · The leaves are heavy
Answer: To survive the cold and the lack of water
It gives up its leaves to get through the winter!
🍁 Q. Which is closest to why leaves change color in autumn?
Options: The nights get shorter · Someone paints them · As it gets colder, the coloring in the leaves changes · The wind blows
Answer: As it gets colder, the coloring in the leaves changes
The green fades, and red and yellow appear!
🌰 Q. Which fruit grows on oak trees and is a squirrel favorite?
Options: Chestnuts · Pine nuts · Walnuts · Acorns
Answer: Acorns
The acorn of the oak tree!
🌰 Q. Which autumn tree fruit has a sweet nut inside a prickly shell?
Options: A pine cone · A ginkgo nut · An acorn · A chestnut
Answer: A chestnut
The chestnut, lovely roasted!
🌲 Q. Which scaly fruit grows on a pine tree?
Options: A chestnut · An apple · A pine cone · An acorn
Answer: A pine cone
The pine cone. When it dries, its scales open wide and send the seeds flying; when it rains, it closes up again.
🟠 Q. Which tree grows persimmons?
Options: Persimmon tree · Pine · Bamboo · Chestnut tree
Answer: Persimmon tree
Orange persimmons hanging everywhere in autumn!
🌰 Q. Which tree grows tasty pine nuts?
Options: Korean pine · Willow · Camellia · Bamboo
Answer: Korean pine
The Korean pine of the high mountains!
📄 Q. What is the main material paper is made from?
Options: Iron · Wood · Water · Stone
Answer: Wood
Paper is made from trees! That's why we don't waste it.
🪵 Q. What material did people long ago use for house pillars and furniture?
Options: Plastic · Rubber · Wood (timber) · Glass
Answer: Wood (timber)
They built houses out of sturdy wood!
🌳 Q. Where does rubber come from?
Options: Stone · Seawater · The sap of the rubber tree · Only petroleum
Answer: The sap of the rubber tree
The white sap that comes out of a rubber tree's bark!
🪵 Q. Which round pattern inside a trunk tells you a tree's age?
Options: Growth rings · Leaf veins · Branches · Knots
Answer: Growth rings
Growth rings. A wide ring means the tree grew well that year, so they tell you not just its age but the weather long ago.
🌳 Q. What do you call the outer skin that wraps and protects a tree trunk?
Options: Bark · Leaves · Roots · Flowers
Answer: Bark
The bark protects everything inside!
🌱 Q. Which part of a tree soaks up water and nutrients?
Options: The fruit · The flowers · The roots · The leaves
Answer: The roots
The roots underground drink up the water!
🍃 Q. Where does a tree take in sunlight and make food?
Options: The leaves · The roots · The trunk · The fruit
Answer: The leaves
The leaves. Tiny holes on their undersides breathe in air, and sunlight helps them make food.
💨 Q. Which welcome gas do trees give us as they photosynthesize?
Options: Nitrogen · Carbon dioxide · Smoke · Oxygen
Answer: Oxygen
They make the oxygen we breathe!
🌳 Q. What does one big tree give us in summer?
Options: Cool shade · Only wind · Ice · Snow
Answer: Cool shade
We cool off in the shade of a tree!
🌲 Q. Which is NOT something a forest gives us?
Options: Exhaust fumes · Clean air · Homes for animals · Cool shade
Answer: Exhaust fumes
Forests clean the air! They cut down fumes, not add them.
🌳 Q. Which shows that trees can live a very long time?
Options: They live one month · Trees don't grow · They live one year · Some trees are hundreds or thousands of years old
Answer: Some trees are hundreds or thousands of years old
Some trees live more than a thousand years!
🌳 Q. What do you call the big old tree at the edge of a village where people rested?
Options: A bonsai · A sapling · A village shade tree · A street tree
Answer: A village shade tree
A bench in the shade of a big old tree!
🎋 Q. Which plant shoots up fast, is hollow inside, and pandas love?
Options: Ginkgo · Maple · Bamboo · Pine
Answer: Bamboo
Bamboo is closer to a grass, but it grows like a tree!
🎋 Q. Which young bamboo shoot do people cook and eat?
Options: Potato · Bamboo shoot · Acorn · Pine shoot
Answer: Bamboo shoot
Bamboo shoots push up in spring!
🌿 Q. Which tree has droopy branches and is often seen by the water?
Options: Pine · Ginkgo · Willow · Camellia
Answer: Willow
The willow, hanging down like threads!
🤍 Q. Which cold-country tree has white bark that peels like paper?
Options: Pine · Birch · Persimmon tree · Bamboo
Answer: Birch
The birch, with its snow-white bark!
🌳 Q. Which tree is famous as a village's big old shade tree and is also used for furniture?
Options: Cactus · Bamboo · Camellia · Zelkova
Answer: Zelkova
The sturdy zelkova!
🎄 Q. Which needle-leaved tree is often used as a Christmas tree?
Options: Ginkgo · Fir · Willow · Persimmon tree
Answer: Fir
A triangle-shaped conifer!
🌸 Q. Which tree has fragrant white flowers in spring, and fruit used for tea and drinks?
Options: The plum tree · Ginkgo · Pine · Bamboo
Answer: The plum tree
The plum tree, which grows plums!
🌺 Q. Which warm-country tree has red flowers in winter and seeds pressed for oil?
Options: Camellia · Ginkgo · Birch · Maple
Answer: Camellia
The camellia, once pressed for camellia oil!
🌵 Q. Which plant lives well even in the desert, storing water in its body?
Options: Cactus · Ginkgo · Pine · Bamboo
Answer: Cactus
The plump, prickly cactus!
🍂 Q. Why is the ginkgo called a 'living fossil'?
Options: It never dies · It has lived from long, long ago right up to today · It's hard as stone · It grows out of fossils
Answer: It has lived from long, long ago right up to today
The ginkgo has been here since the age of the dinosaurs!
🌱 Q. When is Arbor Day, the day for planting trees, usually held?
Options: In spring · In midsummer · At Christmas · On New Year's Day
Answer: In spring
Trees are planted in spring, when they take root best!
🌳 Q. Which is NOT a good thing about planting lots of trees?
Options: They prevent floods and landslides · The air gets dirtier · Animals get homes · The air gets cleaner
Answer: The air gets dirtier
Trees make the air cleaner!
⛰️ Q. What do tree roots hold the soil against?
Options: Sunlight · Rain · Landslides and soil washing away · Wind
Answer: Landslides and soil washing away
The roots grip the soil tight!
🌳 Q. Which is NOT a reason for planting trees along a street?
Options: To give shade · To make it look nice · To make the road narrower · To clean the air
Answer: To make the road narrower
Street trees give shade, clean air, and a nice view!
📄 Q. What do you protect by not wasting paper?
Options: Forests (trees) · Glaciers · The sea · Deserts
Answer: Forests (trees)
Paper is made from trees, so saving it protects forests!
🌲 Q. Which is NOT something you should do in a forest?
Options: Take your trash home · Be careful with fire · Carve your name into a tree · Stay on the marked path
Answer: Carve your name into a tree
You must never wound a tree!
🔥 Q. What happens to trees and animals when there's a forest fire?
Options: The forest and their homes are gone · Animals increase · Nothing happens · The forest gets bigger
Answer: The forest and their homes are gone
Even a tiny spark matters. Watch out for forest fires!