Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 218 · 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.🔮 Predict: a stem is split in two, one half in red water and one in blue. What do the petals do? (a) they fall off at once (b) they all turn green (c) they turn two colours (d) they stay white
2. 2.🔍 Which is the odd one out? (a) dew on morning grass (b) a pond icing over (c) water becoming ice (d) making ice lollies
3. 3.🔍 Which is the odd one out? (a) a suction hook (b) a medicine dropper (c) a vacuum cleaner (d) a compass needle
4. 4.🧺 Which of these is not needed for the coloured flower experiment? (a) a few hours of waiting (b) a magnet (c) food colour (d) a white flower
5. 5.True or false: a paper clip is not needed for the paper helicopter. (a) True (b) False
6. 6.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “time to dissolve”? (a) we keep it the same (b) we change it (c) we measure it
7. 7.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the size of the bowl”? (a) we measure it (b) we change it (c) we keep it the same
8. 8.⚖️ 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 change it (b) we measure it (c) we keep it the same
9. 9.🛟 Why should we wipe up spilled oil at once? (a) oil turns into honey (b) oil makes it rain (c) spilled oil is slippery (d) oil attracts magnets
10. 10.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) True (b) False
11. 11.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a towel for spills (b) a tub of water (c) small test objects (d) a magnet
12. 12.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is the one thing we change? (a) the same straw (b) the slope of the string (c) the same string (d) how big we blow it
13. 13.🚀 In “push back, move forward”, which way does water a swimmer pushes go? (a) goes forward (b) goes backward
14. 14.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the paper clip is what we measure. (a) True (b) False
15. 15.🧺 Do we need a magnet for the water rainbow? (a) needed (b) not needed
16. 16.🔮 Predict: you blow the balloon up only a little. What happens? (a) it goes much farther (b) it goes less far (c) it flies off the string (d) it turns into a kite
17. 17.🫗 Why does cooking oil float on top of water? (a) oil is hot (b) oil is less dense (c) oil is sticky (d) oil is heavier
18. 18.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the person dropping”? (a) we keep it the same (b) we measure it (c) we change it
19. 19.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same glass”? (a) we change it (b) we measure it (c) we keep it the same
20. 20.⚖️ 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 measure it (b) we change it (c) we keep it the same
21. 21.🔍 Which is the odd one out? (a) a paper towel (b) a flower stem (c) a cotton thread (d) a plastic ruler
22. 22.🧺 Do we need ice cubes for the water cycle bowl? (a) not needed (b) needed
23. 23.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same straw is what we measure. (a) False (b) True
24. 24.🛟 Why should only a grown-up handle any hot water? (a) it changes colour (b) hot water is magnetic (c) hot water is heavy (d) hot water can scald
25. 25.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the time of day”? (a) we change it (b) we measure it (c) we keep it the same
26. 26.True or false: turmeric powder is needed for the density tower. (a) True (b) False
27. 27.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a clear glass of water (c) a sunny window (d) a balloon
28. 28.🧺 Which of these is not needed for the paper helicopter? (a) a pencil (b) a balloon (c) safety scissors (d) a strip of paper
29. 29.True or false: sticky tape is not needed for the balloon rocket. (a) True (b) False
30. 30.🧺 Which of these is needed for the water cycle bowl? (a) turmeric powder (b) a battery cell (c) a small cup (d) a mirror
31. 31.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a tub of water (b) small test objects (c) a towel for spills (d) turmeric powder
32. 32.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same string is kept the same. (a) False (b) True
33. 33.📘 What is the push of air on a falling thing called? (a) dissolving (b) magnetism (c) air resistance (d) floating
34. 34.True or false: a teaspoon is not needed for the dissolving test. (a) False (b) True
35. 35.🛟 Which is the safe way to do the float-or-sink test? (a) run around the tub (b) leave water on the floor (c) play near a deep pond (d) wipe up spills at once
36. 36.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a drinking straw (b) a magnet (c) a long string (d) a balloon
37. 37.🔮 A flat sheet and a crumpled ball of the same paper drop together. Which lands first? (a) the crumpled ball (b) neither of them (c) the flat sheet (d) a sheet of glass
38. 38.🧺 Do we need a mirror for the float-or-sink test? (a) needed (b) not needed
39. 39.🧺 Do we need water for the water cycle bowl? (a) not needed (b) needed
40. 40.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is what we measure? (a) sun or shade (b) the size of the bowl (c) the cling film cover (d) how many drops form

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