Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 175 · 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.💧 Which change is this: butter going runny? (a) melting (b) evaporation (c) freezing (d) condensation
2. 2.🛟 Why should we wipe up spilled oil at once? (a) oil makes it rain (b) oil attracts magnets (c) spilled oil is slippery (d) oil turns into honey
3. 3.🛟 Does a piece of thermocol float or sink in water? (a) floats (b) sinks
4. 4.🚀 Which of these goes forward? (a) water a swimmer pushes (b) water from the oars (c) the balloon (d) air from the balloon
5. 5.⚖️ 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
6. 6.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is what we measure? (a) the order of pouring (b) the same glass (c) the same three liquids (d) the order of the layers
7. 7.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is kept the same? (a) the amount of water (b) brightness of rainbow (c) the same glass
8. 8.True or false: small test objects is not needed for the float-or-sink test. (a) True (b) False
9. 9.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: whether the card stays is what we measure. (a) False (b) True
10. 10.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
11. 11.💧 What happens to water vapour when it touches the cold cling film? (a) it turns to salt (b) it disappears (c) it turns to smoke (d) it turns to drops
12. 12.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the amount of water”? (a) we keep it the same (b) we change it (c) we measure it
13. 13.🧺 Which of these is not needed for the water rainbow? (a) a balloon (b) bright sunlight (c) a clear glass of water (d) a sheet of white paper
14. 14.🔮 Predict: you use a rough, thick string instead of a smooth one. (a) it goes faster (b) more friction, less far (c) less friction (d) no change at all
15. 15.🛟 Which is the safe way to do the float-or-sink test? (a) run around the tub (b) play near a deep pond (c) leave water on the floor (d) wipe up spills at once
16. 16.True or false: sand dissolves in water. (a) True (b) False
17. 17.💧 Dip a sugar cube into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
18. 18.True or false: a piece of chalk lets water climb up it. (a) True (b) False
19. 19.⚖️ 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) the time we wait (b) the size of the bowl (c) sun or shade (d) how many drops form
20. 20.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is kept the same. (a) True (b) False
21. 21.🧺 Which of these is not needed for the coloured flower experiment? (a) a battery cell (b) a white flower (c) a few hours of waiting (d) a glass of water
22. 22.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: whether the card stays is kept the same. (a) True (b) False
23. 23.🛟 Who should pour the warm water in the dissolving test? (a) a friend who is running (b) a grown-up (c) nobody needs to (d) the youngest child
24. 24.🧺 Which of these is needed for the dissolving test? (a) sugar (b) a comb (c) a balloon (d) honey
25. 25.🔮 A ball of clay sinks. What happens if you press it into a thin boat shape? (a) it can float (b) it turns to stone (c) it dissolves (d) it sinks faster
26. 26.🧺 Do we need two clear glasses for the dissolving test? (a) not needed (b) needed
27. 27.🌈 How many colours do we name in a rainbow (VIBGYOR)?
28. 28.🧺 Which of these is needed for the water rainbow? (a) turmeric powder (b) a balloon (c) a sunny window (d) a magnet
29. 29.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the amount of water”? (a) we change it (b) we keep it the same (c) we measure it
30. 30.True or false: a feather falls slowly through the air. (a) True (b) False
31. 31.🔍 Which is the odd one out? (a) small pebbles (b) glucose powder (c) sand (d) chalk powder
32. 32.⚖️ 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 glass (b) how full the glass is (c) whether the card stays (d) the way we turn it
33. 33.🧺 Do we need a long string for the balloon rocket? (a) not needed (b) needed
34. 34.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is the one thing we change? (a) the slope of the string (b) the same tape (c) distance it travels (d) how big we blow it
35. 35.🧺 Do we need a balloon for the water cycle bowl? (a) not needed (b) needed
36. 36.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a tub of water (b) a magnet (c) small test objects (d) a towel for spills
37. 37.True or false: vinegar is needed for the balloon rocket. (a) False (b) True
38. 38.🧺 Do we need a magnet for the dissolving test? (a) needed (b) not needed
39. 39.📘 What pulls the paper helicopter down to the floor? (a) gravity (b) the wind (c) magnetism (d) air pressure
40. 40.🍯 Which of these is less dense than water? (a) a glass marble (b) an ice cube (c) very salty water (d) honey

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