Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 187 · 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 — do longer blades make the paper helicopter fall more slowly? What do we do with “time to reach the floor”? (a) we measure it (b) we keep it the same (c) we change it
2. 2.📘 What do we call light bending as it passes from air into water? (a) reflection (b) evaporation (c) refraction (d) magnetism
3. 3.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) yeast (b) food colour (c) a few hours of waiting (d) a glass of water
4. 4.💧 In the covered bowl, where does the water vapour come from? (a) the cling film (b) water warmed by the Sun (c) the air outside (d) the bowl itself
5. 5.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the amount of water is what we measure. (a) True (b) False
6. 6.🛟 Which rule keeps you safe when working with sunlight? (a) never look at the Sun (b) stare at the Sun (c) look at it in a mirror (d) look at it through glass
7. 7.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: time to reach the floor is the one thing we change. (a) True (b) False
8. 8.True or false: a ping-pong ball sinks in water. (a) True (b) False
9. 9.🌈 In VIBGYOR, what number colour is violet?
10. 10.🛟 Which of these floats on water? (a) a ping-pong ball (b) a coin (c) a pebble (d) a metal key
11. 11.📘 What is it called when water climbs up thin tubes or paper by itself? (a) melting (b) magnetism (c) capillary action (d) evaporation
12. 12.🧺 Which of these is needed for the coloured flower experiment? (a) a white flower (b) a mirror (c) a balloon (d) a battery cell
13. 13.True or false: a battery cell is needed for the balloon rocket. (a) True (b) False
14. 14.🛟 Which scissors should children use to cut the paper? (a) safety scissors (b) a paper cutter (c) gardening shears (d) sharp kitchen shears
15. 15.🛟 Does an empty capped bottle float or sink in water? (a) sinks (b) floats
16. 16.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the amount of clay”? (a) we change it (b) we measure it (c) we keep it the same
17. 17.🚁 Why do we clip a paper clip to the bottom of the helicopter? (a) to make it fall slower (b) to stop the spinning (c) to make it magnetic (d) to weigh down the bottom
18. 18.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) cling film (b) ice cubes (c) a battery cell (d) sunlight
19. 19.🔮 Predict: you put ice cubes on top of the cling film. What happens? (a) fewer drops form (b) more drops form (c) the water turns red (d) the bowl freezes
20. 20.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure
21. 21.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) under the honey (b) in the water layer (c) in the honey layer (d) on top of the oil
22. 22.🛟 Who should trim the flower stem? (a) a grown-up (b) a pet (c) a toddler (d) anyone, without looking
23. 23.🧺 Which of these is not needed for the water rainbow? (a) bright sunlight (b) a sheet of white paper (c) a balloon (d) a clear glass of water
24. 24.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is the one thing we change. (a) False (b) True
25. 25.True or false: a comb is not needed for the dissolving test. (a) True (b) False
26. 26.True or false: a sugar cube does not let water climb. (a) False (b) True
27. 27.🥄 Does sugar left unstirred dissolve faster or slower? (a) slower (b) faster
28. 28.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is the one thing we change? (a) brightness of rainbow (b) the amount of water (c) the time of day (d) the same glass
29. 29.True or false: small test objects is not needed for the float-or-sink test. (a) False (b) True
30. 30.💧 Dip a sugar cube into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
31. 31.🧺 Which of these is not needed for the coloured flower experiment? (a) a mirror (b) a few hours of waiting (c) a glass of water (d) food colour
32. 32.🔮 Predict: you use a rough, thick string instead of a smooth one. (a) no change at all (b) it goes faster (c) more friction, less far (d) less friction
33. 33.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “brightness of rainbow”? (a) we change it (b) we measure it (c) we keep it the same
34. 34.🥄 Does sugar stirred well dissolve faster or slower? (a) faster (b) slower
35. 35.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) it turns to plastic (b) it sinks at once (c) nothing ever happens (d) colour climbs up it
36. 36.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a stiff postcard (c) a magnet (d) a towel
37. 37.🧺 Do we need a balloon for the water rainbow? (a) not needed (b) needed
38. 38.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to hide the corks (b) to splash everyone (c) to keep children safe (d) to win a prize
39. 39.🛟 What should you do after handling food colour? (a) rub your eyes (b) wash your hands (c) wipe them on walls (d) lick your fingers
40. 40.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same glass is kept the same. (a) False (b) True

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