Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 420 · 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 the glass of water stand on a steady, flat place? (a) so it turns blue (b) so the Sun moves (c) so it does not fall (d) so it gets hot
2. 2.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “how many drops form”? (a) we keep it the same (b) we change it (c) we measure it
3. 3.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a tub of water (b) a towel for spills (c) a mirror (d) a results table
4. 4.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) air inside pushes back (c) the bottle is magnetic (d) water is hiding there
5. 5.True or false: a battery cell is needed for the density tower. (a) False (b) True
6. 6.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same tape is kept the same. (a) True (b) False
7. 7.📘 What does “dense” mean? (a) heavy for its size (b) very hot (c) very colourful (d) very thin
8. 8.🧺 Which of these is needed for the dissolving test? (a) two clear glasses (b) a magnet (c) a balloon (d) a comb
9. 9.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is the one thing we change? (a) time to dissolve (b) the amount of sugar (c) the water temperature (d) the amount of water
10. 10.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “whether the card stays”? (a) we change it (b) we keep it the same (c) we measure it
11. 11.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the slope of the string”? (a) we keep it the same (b) we measure it (c) we change it
12. 12.🔍 Which is the odd one out? (a) a pebble (b) a glass marble (c) a cork (d) a coin
13. 13.⚖️ 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 size of the bowl (b) the cling film cover (c) sun or shade (d) the time we wait
14. 14.🧺 Which of these is not needed for the water cycle bowl? (a) a small cup (b) water (c) a big bowl (d) a battery cell
15. 15.🧺 Do we need a magnet for the paper helicopter? (a) not needed (b) needed
16. 16.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is what we measure? (a) the same straw (b) the same string (c) the slope of the string (d) distance it travels
17. 17.True or false: a ruler is needed for the paper helicopter. (a) True (b) False
18. 18.🧺 Which of these is not needed for the float-or-sink test? (a) a battery cell (b) a tub of water (c) small test objects (d) a results table
19. 19.🔮 A big log and a small pebble go into a pond. Which one floats? (a) neither of them (b) both of them (c) the small pebble (d) the big log
20. 20.True or false: a magnet is needed for the dissolving test. (a) True (b) False
21. 21.True or false: a battery cell is needed for the card-on-a-glass trick. (a) True (b) False
22. 22.🧺 Which of these is not needed for the balloon rocket? (a) sticky tape (b) a long string (c) vinegar (d) two chairs
23. 23.🧺 Which of these is not needed for the density tower? (a) a spoon (b) a magnet (c) honey (d) a tall clear glass
24. 24.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) sticky tape (b) turmeric powder (c) two chairs (d) a balloon
25. 25.🔮 Predict: wet clothes are hung out on a sunny, windy day. How do they dry? (a) they never dry (b) slower (c) they turn to ice (d) faster
26. 26.🧺 Which of these is not needed for the dissolving test? (a) a mirror (b) a teaspoon (c) sugar (d) warm water
27. 27.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is hotter (c) it will not break (d) it is magnetic
28. 28.🧺 Which of these is not needed for the coloured flower experiment? (a) a few hours of waiting (b) a white flower (c) a balloon (d) food colour
29. 29.🍯 Is cooking oil denser or less dense than water? (a) less dense than water (b) denser than water
30. 30.True or false: turmeric powder is needed for the balloon rocket. (a) True (b) False
31. 31.🛟 Which is the safe way to do the float-or-sink test? (a) leave water on the floor (b) run around the tub (c) play near a deep pond (d) wipe up spills at once
32. 32.🥄 Which of these dissolves faster? (a) sugar left unstirred (b) a big sugar cube (c) sugar in icy water (d) powdered sugar
33. 33.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same string is what we measure. (a) False (b) True
34. 34.💧 Which change is this: butter going runny? (a) freezing (b) evaporation (c) melting (d) condensation
35. 35.🧺 Do we need ice cubes for the water cycle bowl? (a) not needed (b) needed
36. 36.🛟 Where is a safe place to drop the helicopter from? (a) a wobbly chair (b) a roof edge (c) a high window ledge (d) from your raised hand
37. 37.🍯 Is a coin denser or less dense than water? (a) denser than water (b) less dense than water
38. 38.🔍 Which is the odd one out? (a) baking soda (b) sand (c) sawdust (d) cooking oil
39. 39.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sheet of white paper (b) a clear glass of water (c) a balloon (d) a sunny window
40. 40.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is the one thing we change? (a) the way we turn it (b) the same card (c) whether the card stays (d) how full the glass is

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