Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 780 · 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: you use a rough, thick string instead of a smooth one. (a) no change at all (b) less friction (c) it goes faster (d) more friction, less far
2. 2.⚖️ 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 keep it the same (b) we change it (c) we measure it
3. 3.True or false: a balloon is needed for the water cycle bowl. (a) True (b) False
4. 4.True or false: honey is denser than water. (a) True (b) False
5. 5.True or false: a magnet is needed for the water cycle bowl. (a) True (b) False
6. 6.🍯 Is air denser or less dense than water? (a) denser than water (b) less dense than water
7. 7.⚖️ 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 the one thing we change. (a) True (b) False
8. 8.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is what we measure? (a) time to dissolve (b) the kind of sugar (c) the amount of sugar (d) the water temperature
9. 9.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the length of the blades”? (a) we measure it (b) we keep it the same (c) we change it
10. 10.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a mirror (b) food colour (c) a white flower (d) a few hours of waiting
11. 11.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: how big we blow it is kept the same. (a) False (b) True
12. 12.🌈 In VIBGYOR, what number colour is green?
13. 13.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: time to dissolve is what we measure. (a) True (b) False
14. 14.🧺 Which of these is not needed for the balloon rocket? (a) a battery cell (b) a long string (c) a balloon (d) two chairs
15. 15.True or false: turmeric powder is not needed for the paper helicopter. (a) True (b) False
16. 16.True or false: a balloon is not needed for the balloon rocket. (a) True (b) False
17. 17.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is the one thing we change? (a) the amount of water (b) time to dissolve (c) the water temperature (d) the kind of sugar
18. 18.🔮 Predict: you put ice cubes on top of the cling film. What happens? (a) more drops form (b) the water turns red (c) fewer drops form (d) the bowl freezes
19. 19.🔍 Which is the odd one out? (a) a cotton thread (b) a paper towel (c) a piece of foil (d) a strip of cloth
20. 20.🔍 Which is the odd one out? (a) a piece of foil (b) a glass marble (c) a sugar cube (d) a plastic ruler
21. 21.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
22. 22.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) water with food colour (b) yeast (c) cooking oil (d) a tall clear glass
23. 23.🧺 Which of these is needed for the paper helicopter? (a) a mirror (b) a balloon (c) a pencil (d) yeast
24. 24.🍯 Which of these is denser than water? (a) an ice cube (b) a ping-pong ball (c) cooking oil (d) honey
25. 25.🫗 Why does cooking oil float on top of water? (a) oil is sticky (b) oil is less dense (c) oil is heavier (d) oil is hot
26. 26.🛟 Which rule keeps you safe when working with sunlight? (a) never look at the Sun (b) look at it through glass (c) stare at the Sun (d) look at it in a mirror
27. 27.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
28. 28.🥄 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
29. 29.🧺 Do we need honey for the density tower? (a) needed (b) not needed
30. 30.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the tub of water”? (a) we change it (b) we keep it the same (c) we measure it
31. 31.True or false: the rowing boat goes forward. (a) False (b) True
32. 32.🌈 In VIBGYOR, what number colour is orange?
33. 33.🧺 Which of these is not needed for the water cycle bowl? (a) ice cubes (b) cling film (c) a small cup (d) turmeric powder
34. 34.🧺 Which of these is not needed for the water rainbow? (a) bright sunlight (b) a magnet (c) a sheet of white paper (d) a sunny window
35. 35.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is kept the same? (a) the amount of water (b) time to dissolve (c) the water temperature
36. 36.True or false: air is denser than water. (a) True (b) False
37. 37.True or false: turmeric powder is needed for the balloon rocket. (a) True (b) False
38. 38.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) ice cubes (b) water (c) sunlight (d) a mirror
39. 39.🛟 Who should pour the warm water in the dissolving test? (a) a grown-up (b) a friend who is running (c) nobody needs to (d) the youngest child
40. 40.🧺 Do we need yeast for the balloon rocket? (a) not needed (b) needed

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