Class 3 practice
Class 3 science questions.
Science questions for Class 3, at the level of students aged 6–8, each with its answer and a short explanation. Try each one before opening the answer.
What does water turn into when it boils?
Level 4 of 5Show the answer
Answer: Steam
Heating liquid water makes it boil. When water boils, it turns into hot water vapour called steam.
What do seeds need to sprout into plants?
Level 4 of 5Show the answer
Answer: Water, air, and warmth
A seed needs water, air, and warmth to germinate. With these three things, a new baby plant grows.
Which plant part makes food using sunlight?
Level 4 of 5Show the answer
Answer: Leaf
Green leaves use sunlight, water, and air to make food. This is why leaves are called the food factories of plants.
What makes day and night on Earth?
Level 4 of 5Show the answer
Answer: Earth spinning round
The Earth spins like a top. The side facing the Sun has day. The other side has night.
Which animal stores fat in its hump?
Level 4 of 5Show the answer
Answer: Camel
A camel stores fat in its hump. It uses this stored food when it walks in the desert.
Which object allows light to pass straight through?
Level 4 of 5Show the answer
Answer: Clear glass pane
Clear glass is transparent. Light passes easily through it, so you can see through it clearly.
Which body part protects your brain?
Level 4 of 5Show the answer
Answer: Skull
The skull is a hard bony box inside your head. It keeps your brain safe from injury.
When is your shadow shortest outside?
Level 4 of 5Show the answer
Answer: At noon
At noon, the Sun is high right above you. This makes your shadow very short.
Wet clothes dry because water becomes what?
Level 4 of 5Show the answer
Answer: Water vapour
Heat turns liquid water into a gas. This gas is called water vapour.
- True or false?
Soil is made of tiny bits of broken rock.
Level 4 of 5Show the answer
Answer: True
Wind and water break big rocks into tiny pieces. These pieces mix with decayed plants to make soil.
- True or false?
A potato plant stores food in an underground stem.
Level 4 of 5Show the answer
Answer: True
A potato is an underground stem, not a root. It stores food made by the plant.
- True or false?
Whales breathe underwater using gills.
Level 4 of 5Show the answer
Answer: False
Whales are mammals. They breathe air through lungs, not gills like fish.
- Fill in the blank.
Water warms into vapour by ___ (letter e).
Level 4 of 5Show the answer
Answer: evaporation
Evaporation happens when heat turns liquid water into invisible gas called water vapour.
- Fill in the blank.
Ice melts into water at ___ degrees Celsius.
Level 4 of 5Show the answer
Answer: 0
Ice warms up and turns into liquid water at 0 degrees Celsius.
Which one is the odd one out?
Level 4 of 5Show the answer
Answer: Dog
A dog has four legs to walk. Snakes, earthworms, and snails do not have legs.
Which material lets electricity pass through easily?
Level 4 of 5Show the answer
Answer: Copper
Copper is a metal. Metals allow electricity to flow through them easily.
Two magnets push away from each other. What parts are facing?
Level 5 of 5Show the answer
Answer: Two like poles
Like poles repel, or push each other away. This happens when North faces North, or South faces South.
Which feature is found only on birds?
Level 5 of 5Show the answer
Answer: Feathers
Only birds have feathers. Bats and insects also have wings.
Tadpoles hatch from eggs. Which adult animal do they become?
Level 5 of 5Show the answer
Answer: Frog
Frogs lay eggs in water. The eggs hatch into tadpoles, which grow legs and become frogs.
- Fill in the blank.
Light is blocked. A dark ___ forms behind it (first letter: s).
Level 5 of 5Show the answer
Answer: shadow
A shadow is formed when an opaque object blocks the path of light.
These questions come from Ado’s question bank and are written with AI help. They are never used in ranked play, so practising them here can’t change anyone’s rank.
Spot a mistake? Tell us at hi@getado.app and we’ll fix it.
Last updated:
Science for other classes
Other subjects for Class 3
Olympiads for Class 3 · Science olympiad prep
A new set every morning
Ado’s daily brings fresh questions at this level every day, ranked only against students the same age. The Ado Rank it builds never resets.
For parents of students aged 6–17. Free to start, free to rank.