Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 744 · 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 many colours do we name in a rainbow (VIBGYOR)?
2. 2.🫗 Why does cooking oil float on top of water? (a) oil is hot (b) oil is sticky (c) oil is less dense (d) oil is heavier
3. 3.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
4. 4.🔮 A flat sheet and a crumpled ball of the same paper drop together. Which lands first? (a) a sheet of glass (b) the crumpled ball (c) neither of them (d) the flat sheet
5. 5.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the stirring”? (a) we keep it the same (b) we measure it (c) we change it
6. 6.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) on a bed (c) over a sink or bucket (d) over a laptop
7. 7.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: how big we blow it is what we measure. (a) True (b) False
8. 8.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: sun or shade is what we measure. (a) True (b) False
9. 9.🔍 Sugar is stirred into water and seems to disappear. Where did it go? (a) it vanished for ever (b) it sank as sand (c) it became air (d) it spread in the water
10. 10.True or false: a pebble sinks in water. (a) True (b) False
11. 11.🔍 Which is the odd one out? (a) chalk powder (b) small pebbles (c) sugar (d) sand
12. 12.🧺 Which of these is needed for the coloured flower experiment? (a) a glass of water (b) a mirror (c) yeast (d) a magnet
13. 13.🍯 Which of these is less dense than water? (a) cooking oil (b) honey (c) a glass marble (d) a pebble
14. 14.True or false: a ping-pong ball is less dense than water. (a) False (b) True
15. 15.🧺 Do we need a magnet for the coloured flower experiment? (a) needed (b) not needed
16. 16.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? What do we do with “the same three liquids”? (a) we keep it the same (b) we change it (c) we measure it
17. 17.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is the one thing we change? (a) the same glass (b) the same three liquids (c) the order of pouring (d) the order of the layers
18. 18.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) water is hiding there (c) air inside pushes back (d) the cap is sticky
19. 19.🔮 Predict: wet clothes are hung out on a sunny, windy day. How do they dry? (a) faster (b) slower (c) they never dry (d) they turn to ice
20. 20.🧺 Which of these is needed for the density tower? (a) a magnet (b) a battery cell (c) a balloon (d) cooking oil
21. 21.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is kept the same? (a) the water temperature (b) time to dissolve (c) the stirring
22. 22.🚀 Which of these goes backward? (a) the rocket (b) water from the oars (c) the balloon (d) the swimmer
23. 23.💧 Dip a paper towel into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
24. 24.🧺 Which of these is not needed for the coloured flower experiment? (a) a glass of water (b) a few hours of waiting (c) food colour (d) a magnet
25. 25.🚁 Dropped from a raised hand, does a glass marble fall slowly or fast? (a) falls slowly (b) falls fast
26. 26.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the stirring is kept the same. (a) False (b) True
27. 27.🧺 Do we need a battery cell for the balloon rocket? (a) needed (b) not needed
28. 28.🔍 Which is the odd one out? (a) a piece of chalk (b) a paper towel (c) a glass marble (d) a strip of cloth
29. 29.True or false: a big sugar cube dissolves faster. (a) True (b) False
30. 30.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the time of day is kept the same. (a) True (b) False
31. 31.🛟 What should you do with popped balloon pieces? (a) give them to a baby (b) throw them away safely (c) keep them in your mouth (d) chew them
32. 32.True or false: a spoon is needed for the density tower. (a) False (b) True
33. 33.🛟 Which is the safe way to do the float-or-sink test? (a) play near a deep pond (b) run around the tub (c) wipe up spills at once (d) leave water on the floor
34. 34.🧺 Do we need a balloon for the coloured flower experiment? (a) needed (b) not needed
35. 35.🧺 Do we need a white flower for the coloured flower experiment? (a) needed (b) not needed
36. 36.🥄 Which of these dissolves in water? (a) small pebbles (b) sand (c) sugar (d) chalk powder
37. 37.True or false: yeast is not needed for the paper helicopter. (a) False (b) True
38. 38.True or false: a small cup is needed for the water cycle bowl. (a) False (b) True
39. 39.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same glass”? (a) we measure it (b) we keep it the same (c) we change it
40. 40.🍯 Is an ice cube denser or less dense than water? (a) less dense than water (b) denser than water

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