Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 966 · 40 questions

What you do (Find the experiment, use the idea): 1. Read the question and find its experiment. 2. Use that experiment’s idea — density, dissolving, capillary action, light bending, air pressure, push-back, air resistance or condensation. 3. For a fair-test question, find what is changed, kept the same and measured. 4. For a safety question, choose what keeps everyone safe.

1. 1.🛟 How should you check if the sugar has dissolved? (a) look for leftover grains (b) taste it (c) poke it with a finger (d) smell it closely
2. 2.🥛 What holds the card up against the upside-down glass? (a) air pushing up (b) a magnet (c) the cold water (d) glue on the card
3. 3.🍯 Which of these is less dense than water? (a) a pebble (b) honey (c) a ping-pong ball (d) a coin
4. 4.True or false: turmeric powder is not needed for the balloon rocket. (a) False (b) True
5. 5.🔮 Predict: you fold the two blades the other way. What changes? (a) it turns blue (b) it spins the other way (c) it does not fall (d) it falls upward
6. 6.🫗 Why does cooking oil float on top of water? (a) oil is sticky (b) oil is hot (c) oil is less dense (d) oil is heavier
7. 7.🧺 Do we need turmeric powder for the float-or-sink test? (a) needed (b) not needed
8. 8.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the cling film cover”? (a) we change it (b) we measure it (c) we keep it the same
9. 9.🔮 Predict: an empty capped bottle floats. What happens if you fill it with sand? (a) it melts (b) it turns blue (c) it sinks (d) it floats higher
10. 10.True or false: a sugar cube does not let water climb. (a) True (b) False
11. 11.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a magnet (b) a glass of water (c) a stiff postcard (d) a sink or a bucket
12. 12.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to make it rain (c) to catch any spills (d) to grow plants
13. 13.True or false: a balloon is not needed for the balloon rocket. (a) True (b) False
14. 14.🥄 Which of these does not dissolve in water? (a) glucose powder (b) baking soda (c) sugar (d) sand
15. 15.True or false: a strip of paper is not needed for the paper helicopter. (a) False (b) True
16. 16.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is the one thing we change? (a) how full the glass is (b) the same card (c) whether the card stays (d) the way we turn it
17. 17.🔮 A ball of clay sinks. What happens if you press it into a thin boat shape? (a) it turns to stone (b) it can float (c) it dissolves (d) it sinks faster
18. 18.🔮 Predict: you shake oil and water hard in a closed bottle and wait. What happens? (a) they mix for ever (b) they turn to honey (c) they separate again (d) they become solid
19. 19.🔍 You drop a coin into a tub of water. What do you see? (a) it dissolves (b) it floats (c) it bounces up (d) it sinks
20. 20.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is what we measure? (a) distance it travels (b) the same straw (c) the same tape (d) how big we blow it
21. 21.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a stiff postcard (c) a towel (d) a magnet
22. 22.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the length of the stem is what we measure. (a) False (b) True
23. 23.🔮 Predict: you add two more paper clips. How does it fall? (a) it floats up (b) slower (c) faster (d) it stops in the air
24. 24.🛟 What should you do with popped balloon pieces? (a) chew them (b) throw them away safely (c) keep them in your mouth (d) give them to a baby
25. 25.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) prisms (b) balloons (c) magnets (d) clouds
26. 26.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a glass of water (b) food colour (c) a few hours of waiting (d) a mirror
27. 27.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
28. 28.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: the same glass is what we measure. (a) False (b) True
29. 29.💧 Which of these is condensation? (a) wet clothes drying (b) drops on a cold glass (c) ice becoming water (d) sweat drying on skin
30. 30.🌦️ To see a rainbow in the sky, where must the Sun be? (a) in front of you (b) straight above you (c) behind you (d) under the ground
31. 31.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) turmeric powder (c) a sheet of white paper (d) a clear glass of water
32. 32.🎈 Air rushes out of the back of the balloon. Which way does the balloon move? (a) forward (b) straight down (c) it stays still (d) backward
33. 33.🧺 Which of these is needed for the paper helicopter? (a) a mirror (b) a strip of paper (c) a battery cell (d) turmeric powder
34. 34.True or false: a comb is needed for the dissolving test. (a) True (b) False
35. 35.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
36. 36.💧 Why do water drops form on the outside of a glass of ice water? (a) ice escapes the glass (b) the glass sweats (c) vapour in air cools (d) the glass leaks
37. 37.🧺 Do we need a balloon for the paper helicopter? (a) not needed (b) needed
38. 38.🧺 Do we need turmeric powder for the paper helicopter? (a) not needed (b) needed
39. 39.🚁 Why do we clip a paper clip to the bottom of the helicopter? (a) to stop the spinning (b) to weigh down the bottom (c) to make it fall slower (d) to make it magnetic
40. 40.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: the time we wait is kept the same. (a) True (b) False

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