Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 658 · 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.🛟 Why should only a grown-up handle any hot water? (a) hot water can scald (b) hot water is magnetic (c) it changes colour (d) hot water is heavy
2. 2.🌊 What pushes a floating cork upward? (a) the cork itself (b) the water (c) the air above (d) the tub
3. 3.🔮 Predict: wet clothes are hung out on a sunny, windy day. How do they dry? (a) slower (b) they turn to ice (c) faster (d) they never dry
4. 4.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same window is kept the same. (a) False (b) True
5. 5.⚖️ 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 change it (c) we keep it the same
6. 6.💧 Dip a paper towel into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
7. 7.True or false: a balloon is not needed for the water rainbow. (a) False (b) True
8. 8.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is the one thing we change? (a) the time we wait (b) the amount of water (c) the cling film cover (d) sun or shade
9. 9.🔮 Predict: you fold the two blades the other way. What changes? (a) it spins the other way (b) it does not fall (c) it turns blue (d) it falls upward
10. 10.🥄 Why does sugar dissolve faster in warm water? (a) sugar likes the dark (b) cold water is wet (c) particles move faster (d) warm water is thicker
11. 11.🛟 Why should we wipe up spilled oil at once? (a) oil attracts magnets (b) spilled oil is slippery (c) oil turns into honey (d) oil makes it rain
12. 12.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a paper clip (b) a ruler (c) a mirror (d) a pencil
13. 13.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a ruler (b) yeast (c) a paper clip (d) a strip of paper
14. 14.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a balloon (b) a strip of paper (c) a ruler (d) a pencil
15. 15.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a results table (b) small test objects (c) yeast (d) a tub of water
16. 16.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a mirror (b) a clear glass of water (c) bright sunlight (d) a sheet of white paper
17. 17.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same window”? (a) we keep it the same (b) we measure it (c) we change it
18. 18.🛟 Which is a safe rule for the balloon rocket? (a) aim it at your friend (b) blow it till it bursts (c) put string round a neck (d) keep it away from faces
19. 19.🧺 Which of these is not needed for the paper helicopter? (a) a strip of paper (b) safety scissors (c) a battery cell (d) a ruler
20. 20.🎈 When does the balloon rocket stop? (a) when it gets cold (b) when the air runs out (c) it never stops (d) when it turns blue
21. 21.🍯 Which of these is denser than water? (a) an ice cube (b) a cork (c) a glass marble (d) cooking oil
22. 22.📘 What pulls the paper helicopter down to the floor? (a) the wind (b) air pressure (c) magnetism (d) gravity
23. 23.🧺 Do we need a long string for the balloon rocket? (a) needed (b) not needed
24. 24.True or false: a glass of water is not needed for the coloured flower experiment. (a) True (b) False
25. 25.🎈 What is the job of the straw on the string? (a) it blows air in (b) it guides the balloon (c) it holds water (d) it makes it heavier
26. 26.🫗 Why does cooking oil float on top of water? (a) oil is hot (b) oil is heavier (c) oil is sticky (d) oil is less dense
27. 27.🔮 Predict: you shake oil and water hard in a closed bottle and wait. What happens? (a) they turn to honey (b) they mix for ever (c) they become solid (d) they separate again
28. 28.🧺 Do we need two chairs for the balloon rocket? (a) needed (b) not needed
29. 29.🧺 Do we need sugar for the dissolving test? (a) needed (b) not needed
30. 30.🧺 Which of these is needed for the water rainbow? (a) a mirror (b) yeast (c) bright sunlight (d) a magnet
31. 31.🧺 Which of these is not needed for the water cycle bowl? (a) a small cup (b) a big bowl (c) sunlight (d) a magnet
32. 32.🛟 What should you do after handling food colour? (a) wipe them on walls (b) lick your fingers (c) rub your eyes (d) wash your hands
33. 33.🧺 Which of these is not needed for the dissolving test? (a) a clock or timer (b) two clear glasses (c) a mirror (d) a teaspoon
34. 34.🧺 Do we need food colour for the coloured flower experiment? (a) needed (b) not needed
35. 35.🧺 Do we need a magnet for the water rainbow? (a) not needed (b) needed
36. 36.🛟 Which rule keeps the density tower experiment safe? (a) throw the glass (b) pour it on the floor (c) do not lick the spoon (d) taste each layer
37. 37.🔍 Which layer is on top in the honey-water-oil tower? (a) coloured water (b) the spoon (c) cooking oil (d) honey
38. 38.🔮 What would change if the flower stood in plain water? (a) the stem turns blue (b) the flower glows (c) the petals turn red (d) no colour change
39. 39.🍯 Is honey denser or less dense than water? (a) denser than water (b) less dense than water
40. 40.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a balloon (b) yeast (c) sticky tape (d) two chairs

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