Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 529 · 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.🛟 Why should only a grown-up handle any hot water? (a) it changes colour (b) hot water is heavy (c) hot water is magnetic (d) hot water can scald
2. 2.🚀 Which of these goes backward? (a) air from the balloon (b) the rocket (c) the rowing boat (d) the balloon
3. 3.🧺 Do we need turmeric powder for the density tower? (a) not needed (b) needed
4. 4.🌈 How many colours do we name in a rainbow (VIBGYOR)?
5. 5.🥄 Does powdered sugar dissolve faster or slower? (a) faster (b) slower
6. 6.🔍 Which is the odd one out? (a) a suction hook (b) a vacuum cleaner (c) a fridge magnet (d) a drinking straw
7. 7.True or false: a crumpled paper ball falls slowly through the air. (a) True (b) False
8. 8.🌧️ The drops falling back into the bowl are like which part of the real water cycle? (a) wind (b) rain (c) lightning (d) sunshine
9. 9.True or false: a strip of cloth lets water climb up it. (a) False (b) True
10. 10.🛟 Who should pour the warm water in the dissolving test? (a) a friend who is running (b) a grown-up (c) the youngest child (d) nobody needs to
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 measure it (c) we change it
12. 12.🛟 Which scissors should children use to cut the paper? (a) a paper cutter (b) sharp kitchen shears (c) gardening shears (d) safety scissors
13. 13.🚁 Which of these falls slowly through the air? (a) an open sheet of paper (b) a crumpled paper ball (c) a steel spoon (d) a coin
14. 14.🔍 Which is the odd one out? (a) a suction hook (b) a drinking straw (c) a magnetic chess set (d) a vacuum cleaner
15. 15.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same window is what we measure. (a) False (b) True
16. 16.🚁 Why does the paper helicopter fall slowly? (a) a magnet holds it (b) air pushes on its blades (c) the floor pushes it (d) it has no weight
17. 17.🥄 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
18. 18.🔮 Predict: an empty capped bottle floats. What happens if you fill it with sand? (a) it sinks (b) it melts (c) it turns blue (d) it floats higher
19. 19.🛟 Which is the safe way to do the float-or-sink test? (a) wipe up spills at once (b) run around the tub (c) play near a deep pond (d) leave water on the floor
20. 20.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) over a sink or bucket (c) over a laptop (d) on a bed
21. 21.🛟 Who should trim the flower stem? (a) a toddler (b) a pet (c) a grown-up (d) anyone, without looking
22. 22.🛟 Does a pebble float or sink in water? (a) floats (b) sinks
23. 23.🛟 Where is a safe place to drop the helicopter from? (a) a wobbly chair (b) a roof edge (c) from your raised hand (d) a high window ledge
24. 24.🔮 Predict: you blow the balloon up only a little. What happens? (a) it goes much farther (b) it flies off the string (c) it goes less far (d) it turns into a kite
25. 25.🛟 Why should we wipe up spilled oil at once? (a) spilled oil is slippery (b) oil makes it rain (c) oil turns into honey (d) oil attracts magnets
26. 26.🧺 Do we need a battery cell for the float-or-sink test? (a) not needed (b) needed
27. 27.🚁 Why do we clip a paper clip to the bottom of the helicopter? (a) to weigh down the bottom (b) to make it magnetic (c) to stop the spinning (d) to make it fall slower
28. 28.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: the cling film cover is the one thing we change. (a) False (b) True
29. 29.True or false: yeast is needed for the balloon rocket. (a) True (b) False
30. 30.🧺 Do we need a towel for spills for the float-or-sink test? (a) needed (b) not needed
31. 31.🔍 Which is the odd one out? (a) a toy parachute (b) a glass marble (c) a fluff of cotton (d) an open sheet of paper
32. 32.True or false: yeast is needed for the density tower. (a) True (b) False
33. 33.⚖️ 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 glass”? (a) we measure it (b) we change it (c) we keep it the same
34. 34.🥄 Which of these does not dissolve in water? (a) food colour (b) sawdust (c) sugar (d) table salt
35. 35.🔮 Predict: wet clothes are hung out on a sunny, windy day. How do they dry? (a) faster (b) they never dry (c) slower (d) they turn to ice
36. 36.🍯 Which of these is denser than water? (a) air (b) a pebble (c) a ping-pong ball (d) an ice cube
37. 37.🛟 Which of these floats on water? (a) an iron nail (b) a coin (c) a glass marble (d) a ping-pong ball
38. 38.True or false: sugar stirred well dissolves slower. (a) True (b) False
39. 39.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the kind of clay is the one thing we change. (a) False (b) True
40. 40.True or false: snow turning to water is evaporation. (a) True (b) False

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