Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 28 · 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.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is kept the same? (a) time to dissolve (b) the water temperature (c) the amount of water
2. 2.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
3. 3.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same white paper”? (a) we measure it (b) we change it (c) we keep it the same
4. 4.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) two clear glasses (b) a teaspoon (c) a balloon (d) a clock or timer
5. 5.🛟 Why should the glass of water stand on a steady, flat place? (a) so it turns blue (b) so it does not fall (c) so it gets hot (d) so the Sun moves
6. 6.🍯 Is air denser or less dense than water? (a) denser than water (b) less dense than water
7. 7.🧺 Which of these is not needed for the dissolving test? (a) cold water (b) a teaspoon (c) a mirror (d) warm water
8. 8.True or false: a sheet of white paper is not needed for the water rainbow. (a) False (b) True
9. 9.🧺 Do we need cold water for the dissolving test? (a) needed (b) not needed
10. 10.True or false: a clock or timer is needed for the dissolving test. (a) False (b) True
11. 11.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a glass of water (b) a mirror (c) food colour (d) a white flower
12. 12.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) safety scissors (b) a battery cell (c) a paper clip (d) a pencil
13. 13.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is what we measure? (a) the stirring (b) the amount of sugar (c) time to dissolve (d) the kind of sugar
14. 14.🧺 Do we need a mirror for the density tower? (a) not needed (b) needed
15. 15.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
16. 16.🧺 Do we need a mirror for the water rainbow? (a) needed (b) not needed
17. 17.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is what we measure? (a) the same card (b) the same glass (c) the way we turn it (d) whether the card stays
18. 18.True or false: a glass marble does not let water climb. (a) False (b) True
19. 19.🧺 Which of these is needed for the density tower? (a) a mirror (b) turmeric powder (c) a magnet (d) a spoon
20. 20.💧 Why do water drops form on the outside of a glass of ice water? (a) ice escapes the glass (b) the glass leaks (c) the glass sweats (d) vapour in air cools
21. 21.🫗 Why does cooking oil float on top of water? (a) oil is heavier (b) oil is less dense (c) oil is hot (d) oil is sticky
22. 22.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
23. 23.⚖️ 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 glass”? (a) we keep it the same (b) we change it (c) we measure it
24. 24.⚖️ 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) False (b) True
25. 25.🛟 Who should pour the warm water in the dissolving test? (a) a friend who is running (b) a grown-up (c) the youngest child (d) nobody needs to
26. 26.🧺 Do we need water for the water cycle bowl? (a) needed (b) not needed
27. 27.🔮 A flat sheet and a crumpled ball of the same paper drop together. Which lands first? (a) neither of them (b) a sheet of glass (c) the flat sheet (d) the crumpled ball
28. 28.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is what we measure? (a) the same string (b) distance it travels (c) the same straw (d) how big we blow it
29. 29.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) the cold water (c) air pushing up (d) glue on the card
30. 30.🧺 Which of these is not needed for the balloon rocket? (a) a battery cell (b) a drinking straw (c) a balloon (d) a long string
31. 31.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is the one thing we change? (a) the drop height (b) the length of the blades (c) the paper clip (d) the person dropping
32. 32.🔍 Sand is stirred into water. What do you see after a while? (a) it turns blue (b) it floats up (c) it settles at the bottom (d) it dissolves
33. 33.🧺 Do we need a few hours of waiting for the coloured flower experiment? (a) needed (b) not needed
34. 34.🧺 Do we need small test objects for the float-or-sink test? (a) needed (b) not needed
35. 35.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same straw is kept the same. (a) False (b) True
36. 36.🧺 Do we need yeast for the balloon rocket? (a) needed (b) not needed
37. 37.True or false: cooking oil is denser than water. (a) False (b) True
38. 38.🥄 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
39. 39.True or false: a ping-pong ball floats on water. (a) False (b) True
40. 40.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) the card gets wet (c) it looks nicer (d) little air left inside

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