Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 902 · 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.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
2. 2.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is magnetic (c) it is heavier (d) it is hotter
3. 3.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is the one thing we change? (a) the length of the blades (b) the paper clip (c) the kind of paper (d) the person dropping
4. 4.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “sun or shade”? (a) we measure it (b) we keep it the same (c) we change it
5. 5.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is kept the same? (a) the person dropping (b) the length of the blades (c) time to reach the floor
6. 6.🔮 Predict: you use a rough, thick string instead of a smooth one. (a) more friction, less far (b) no change at all (c) less friction (d) it goes faster
7. 7.🧺 Do we need a battery cell for the density tower? (a) needed (b) not needed
8. 8.🥛 Which of these works by air pressure? (a) a compass needle (b) a suction hook (c) a magnetic chess set (d) a magnetic pin holder
9. 9.🛟 Does a dry leaf float or sink in water? (a) sinks (b) floats
10. 10.🥄 Which of these dissolves faster? (a) sugar in icy water (b) sugar left unstirred (c) a big sugar cube (d) sugar in warm water
11. 11.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the stirring”? (a) we keep it the same (b) we change it (c) we measure it
12. 12.⚖️ 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
13. 13.True or false: a paper helicopter falls slowly through the air. (a) False (b) True
14. 14.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the kind of flower”? (a) we measure it (b) we change it (c) we keep it the same
15. 15.🍯 Is a coin denser or less dense than water? (a) less dense than water (b) denser than water
16. 16.True or false: a comb is not needed for the dissolving test. (a) False (b) True
17. 17.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is the one thing we change? (a) how big we blow it (b) the same string (c) the slope of the string (d) distance it travels
18. 18.🛟 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
19. 19.True or false: a dry leaf floats on water. (a) False (b) True
20. 20.🔮 A ball of clay sinks. What happens if you press it into a thin boat shape? (a) it can float (b) it dissolves (c) it sinks faster (d) it turns to stone
21. 21.True or false: a comb is needed for the dissolving test. (a) True (b) False
22. 22.⚖️ 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
23. 23.🍯 Is a ping-pong ball denser or less dense than water? (a) denser than water (b) less dense than water
24. 24.True or false: a mirror is not needed for the density tower. (a) False (b) True
25. 25.🧺 Which of these is not needed for the water rainbow? (a) yeast (b) a sheet of white paper (c) a sunny window (d) a clear glass of water
26. 26.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) colour climbs up it (b) nothing ever happens (c) it sinks at once (d) it turns to plastic
27. 27.🧊 Why does an ice cube float on water? (a) ice is very cold (b) ice is magnetic (c) water is sticky (d) ice is less dense
28. 28.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a white flower (b) food colour (c) a glass of water (d) a balloon
29. 29.⚖️ 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
30. 30.🔮 Predict: you add two more paper clips. How does it fall? (a) faster (b) it floats up (c) slower (d) it stops in the air
31. 31.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a balloon (b) a tub of water (c) a results table (d) small test objects
32. 32.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a battery cell (b) small test objects (c) a towel for spills (d) a results table
33. 33.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns brighter (b) it turns all red (c) the rainbow fades (d) it floats away
34. 34.🧺 Do we need yeast for the coloured flower experiment? (a) not needed (b) needed
35. 35.🧺 Do we need yeast for the balloon rocket? (a) not needed (b) needed
36. 36.True or false: a balloon is needed for the coloured flower experiment. (a) True (b) False
37. 37.True or false: a coin is denser than water. (a) False (b) True
38. 38.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) honey (b) a tall clear glass (c) cooking oil (d) a magnet
39. 39.True or false: yeast is needed for the paper helicopter. (a) True (b) False
40. 40.🧺 Which of these is not needed for the density tower? (a) a tall clear glass (b) a spoon (c) a battery cell (d) water with food colour

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