Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 740 · 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 — does colour reach the petals faster with a short stem or a long stem? What do we do with “the room it stands in”? (a) we keep it the same (b) we measure it (c) we change it
2. 2.True or false: a spoon is not needed for the density tower. (a) True (b) False
3. 3.🧺 Which of these is needed for the density tower? (a) a mirror (b) yeast (c) cooking oil (d) a magnet
4. 4.🔮 What would change if the flower stood in plain water? (a) the petals turn red (b) the stem turns blue (c) the flower glows (d) no colour change
5. 5.🧺 Do we need cooking oil for the density tower? (a) not needed (b) needed
6. 6.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the time we wait”? (a) we measure it (b) we change it (c) we keep it the same
7. 7.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) clouds (b) balloons (c) magnets (d) prisms
8. 8.🧺 Do we need food colour for the coloured flower experiment? (a) not needed (b) needed
9. 9.⚖️ 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 keep it the same (b) we change it (c) we measure it
10. 10.🧺 Which of these is needed for the coloured flower experiment? (a) a mirror (b) yeast (c) a balloon (d) a few hours of waiting
11. 11.🔮 Predict: you blow the balloon up only a little. What happens? (a) it flies off the string (b) it goes less far (c) it turns into a kite (d) it goes much farther
12. 12.⚖️ 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 amount of water (b) the cling film cover (c) sun or shade (d) the size of the bowl
13. 13.🔍 Which is the odd one out? (a) a piece of thermocol (b) a dry leaf (c) a steel spoon (d) a cork
14. 14.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to grow plants (c) to make it rain (d) to catch any spills
15. 15.📘 What do we call light bending as it passes from air into water? (a) refraction (b) evaporation (c) reflection (d) magnetism
16. 16.🧺 Do we need a towel for spills for the float-or-sink test? (a) not needed (b) needed
17. 17.True or false: yeast is needed for the water cycle bowl. (a) False (b) True
18. 18.🧺 Which of these is needed for the density tower? (a) a magnet (b) yeast (c) water with food colour (d) a balloon
19. 19.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) under the honey (b) in the honey layer (c) in the water layer (d) on top of the oil
20. 20.True or false: a balloon is needed for the water cycle bowl. (a) True (b) False
21. 21.🥄 Does table salt dissolve in water? (a) dissolves in water (b) does not dissolve
22. 22.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) two chairs (b) sticky tape (c) turmeric powder (d) a balloon
23. 23.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) sunlight (b) a battery cell (c) cling film (d) ice cubes
24. 24.True or false: a bicycle pump works by magnetism. (a) False (b) True
25. 25.🎈 When does the balloon rocket stop? (a) it never stops (b) when the air runs out (c) when it gets cold (d) when it turns blue
26. 26.True or false: a coin is denser than water. (a) True (b) False
27. 27.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is kept the same? (a) the same card (b) how full the glass is (c) whether the card stays
28. 28.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
29. 29.🛟 Which rule keeps you safe when working with sunlight? (a) stare at the Sun (b) look at it in a mirror (c) never look at the Sun (d) look at it through glass
30. 30.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a results table (b) a balloon (c) a towel for spills (d) small test objects
31. 31.🧺 Do we need a big bowl for the water cycle bowl? (a) not needed (b) needed
32. 32.🧺 Which of these is not needed for the paper helicopter? (a) a strip of paper (b) a ruler (c) turmeric powder (d) safety scissors
33. 33.True or false: turmeric powder is needed for the balloon rocket. (a) True (b) False
34. 34.True or false: a fridge magnet works by air pressure. (a) True (b) False
35. 35.🛟 What should you do with wet floors after the experiment? (a) pour more water (b) leave them wet (c) slide on them (d) wipe them dry
36. 36.🔍 Which is the odd one out? (a) sugar (b) baking soda (c) chalk powder (d) food colour
37. 37.⚖️ 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 measure it (b) we keep it the same (c) we change it
38. 38.🧺 Do we need vinegar for the balloon rocket? (a) not needed (b) needed
39. 39.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) the cold water (c) air pushing up (d) a magnet
40. 40.🧺 Do we need a balloon for the density tower? (a) needed (b) not needed

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