Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 527 · 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.🔮 Predict: you blow the balloon up only a little. What happens? (a) it flies off the string (b) it goes much farther (c) it goes less far (d) it turns into a kite
2. 2.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a balloon (c) a towel (d) a glass of water
3. 3.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns all red (b) it floats away (c) the rainbow fades (d) it turns brighter
4. 4.⚖️ 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) True (b) False
5. 5.🔮 Predict: you put ice cubes on top of the cling film. What happens? (a) fewer drops form (b) the water turns red (c) more drops form (d) the bowl freezes
6. 6.True or false: a plastic ruler lets water climb up it. (a) True (b) False
7. 7.🧺 Which of these is not needed for the paper helicopter? (a) a magnet (b) a pencil (c) a strip of paper (d) a ruler
8. 8.🔍 Which is the odd one out? (a) a ping-pong ball (b) honey (c) air (d) cooking oil
9. 9.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) on a bed (c) near a plug point (d) over a sink or bucket
10. 10.🧺 Which of these is needed for the water cycle bowl? (a) ice cubes (b) a mirror (c) a balloon (d) a battery cell
11. 11.🧺 Which of these is needed for the density tower? (a) a spoon (b) a balloon (c) a magnet (d) turmeric powder
12. 12.🔍 Which is the odd one out? (a) a cork (b) air (c) a ping-pong ball (d) very salty water
13. 13.🔮 A ball of clay sinks. What happens if you press it into a thin boat shape? (a) it can float (b) it sinks faster (c) it dissolves (d) it turns to stone
14. 14.⚖️ 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) the time of day (b) the same glass (c) the same white paper (d) the amount of water
15. 15.🔮 Predict: an empty capped bottle floats. What happens if you fill it with sand? (a) it floats higher (b) it melts (c) it turns blue (d) it sinks
16. 16.📘 What is water vapour? (a) tiny ice cubes (b) salty water (c) a kind of smoke (d) water as a gas
17. 17.True or false: a balloon is not needed for the float-or-sink test. (a) True (b) False
18. 18.🥄 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
19. 19.True or false: an ice cube floats on water. (a) False (b) True
20. 20.⚖️ 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) the way we turn it (d) whether the card stays
21. 21.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) under the honey (b) on top of the oil (c) in the honey layer (d) in the water layer
22. 22.🧺 Do we need a mirror for the water rainbow? (a) needed (b) not needed
23. 23.🌊 What pushes a floating cork upward? (a) the water (b) the cork itself (c) the air above (d) the tub
24. 24.🛟 Which is the safe way to do the float-or-sink test? (a) play near a deep pond (b) leave water on the floor (c) wipe up spills at once (d) run around the tub
25. 25.🧺 Which of these is not needed for the coloured flower experiment? (a) food colour (b) a white flower (c) a mirror (d) a glass of water
26. 26.⚖️ 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
27. 27.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “whether it floats”? (a) we keep it the same (b) we measure it (c) we change it
28. 28.True or false: a steel spoon does not let water climb. (a) True (b) False
29. 29.🛟 Does a glass marble float or sink in water? (a) sinks (b) floats
30. 30.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is kept the same? (a) the same glass (b) the order of the layers (c) the order of pouring
31. 31.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the amount of sugar”? (a) we measure it (b) we keep it the same (c) we change it
32. 32.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a drinking straw (b) a long string (c) a balloon (d) a magnet
33. 33.🧺 Which of these is not needed for the balloon rocket? (a) a drinking straw (b) a battery cell (c) sticky tape (d) a long string
34. 34.💧 Which of these is freezing? (a) dew on morning grass (b) sweat drying on skin (c) butter going runny (d) a pond icing over
35. 35.🛟 Why should you not over-blow the balloon? (a) it changes colour (b) it turns into a kite (c) it gets too heavy (d) it can pop loudly
36. 36.🧺 Do we need a magnet for the dissolving test? (a) needed (b) not needed
37. 37.True or false: yeast is not needed for the coloured flower experiment. (a) True (b) False
38. 38.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is what we measure? (a) the same tape (b) how big we blow it (c) the same straw (d) distance it travels
39. 39.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) small test objects (b) a results table (c) a mirror (d) a towel for spills
40. 40.🧺 Do we need a results table for the float-or-sink test? (a) not needed (b) needed

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