Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 366 · 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.🛟 What should you do after handling food colour? (a) rub your eyes (b) wash your hands (c) wipe them on walls (d) lick your fingers
2. 2.🧺 Do we need honey for the density tower? (a) not needed (b) needed
3. 3.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) prisms (b) balloons (c) magnets (d) clouds
4. 4.True or false: a balloon is not needed for the density tower. (a) True (b) False
5. 5.🍯 Is a glass marble denser or less dense than water? (a) less dense than water (b) denser than water
6. 6.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is the one thing we change? (a) how big we blow it (b) the same string (c) the same tape (d) the same straw
7. 7.🧺 Which of these is needed for the water cycle bowl? (a) yeast (b) turmeric powder (c) a magnet (d) a big bowl
8. 8.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a results table (b) a towel for spills (c) a battery cell (d) a tub of water
9. 9.🔮 Predict: you gently drop a coin into the tower. Where does it end up? (a) at the very bottom (b) in the water layer (c) in the oil layer (d) on top of the oil
10. 10.🧺 Which of these is not needed for the density tower? (a) cooking oil (b) honey (c) water with food colour (d) a mirror
11. 11.💧 Which of these is evaporation? (a) a misty bathroom mirror (b) drops under a pot lid (c) dew on morning grass (d) sweat drying on skin
12. 12.🔍 Which is the odd one out? (a) a cotton thread (b) a glass marble (c) a steel spoon (d) a rubber eraser
13. 13.True or false: a towel is needed for the card-on-a-glass trick. (a) True (b) False
14. 14.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is kept the same? (a) brightness of rainbow (b) the time of day (c) the amount of water
15. 15.🛟 Who should pour the warm water in the dissolving test? (a) nobody needs to (b) a friend who is running (c) the youngest child (d) a grown-up
16. 16.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the water turns to ice (c) the card flies away (d) the card stays on
17. 17.True or false: a battery cell is not needed for the float-or-sink test. (a) True (b) False
18. 18.True or false: a balloon is not needed for the balloon rocket. (a) True (b) False
19. 19.🥄 Which of these dissolves in water? (a) sand (b) sawdust (c) chalk powder (d) baking soda
20. 20.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: the order of the layers is what we measure. (a) True (b) False
21. 21.🛟 Why should we wipe up spilled oil at once? (a) oil turns into honey (b) oil makes it rain (c) oil attracts magnets (d) spilled oil is slippery
22. 22.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
23. 23.🛟 Which rule keeps the density tower experiment safe? (a) taste each layer (b) do not lick the spoon (c) throw the glass (d) pour it on the floor
24. 24.🫗 Why does cooking oil float on top of water? (a) oil is hot (b) oil is less dense (c) oil is heavier (d) oil is sticky
25. 25.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “distance it travels”? (a) we change it (b) we measure it (c) we keep it the same
26. 26.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: brightness of rainbow is the one thing we change. (a) True (b) False
27. 27.🧺 Do we need a battery cell for the paper helicopter? (a) not needed (b) needed
28. 28.🛟 Why should the glass of water stand on a steady, flat place? (a) so it gets hot (b) so it turns blue (c) so the Sun moves (d) so it does not fall
29. 29.🌈 How many colours do we name in a rainbow (VIBGYOR)?
30. 30.🧺 Which of these is not needed for the water rainbow? (a) a sunny window (b) a battery cell (c) a sheet of white paper (d) bright sunlight
31. 31.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a shadow of ice (b) a small rainbow (c) snow falling (d) a magnet
32. 32.💧 What happens to water vapour when it touches the cold cling film? (a) it turns to salt (b) it disappears (c) it turns to smoke (d) it turns to drops
33. 33.True or false: two clear glasses is needed for the dissolving test. (a) False (b) True
34. 34.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a balloon (c) a sink or a bucket (d) a magnet
35. 35.🔍 Sugar is stirred into water and seems to disappear. Where did it go? (a) it spread in the water (b) it became air (c) it vanished for ever (d) it sank as sand
36. 36.🛟 Where is a safe place to drop the helicopter from? (a) a wobbly chair (b) a roof edge (c) a high window ledge (d) from your raised hand
37. 37.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is the one thing we change? (a) the shape of the clay (b) the tub of water (c) whether it floats (d) the kind of clay
38. 38.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) cooking oil (b) a spoon (c) water with food colour (d) a magnet
39. 39.True or false: a small cup is not needed for the water cycle bowl. (a) False (b) True
40. 40.🔮 Predict: wet clothes are hung out on a sunny, windy day. How do they dry? (a) they never dry (b) faster (c) slower (d) they turn to ice

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