Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 637 · 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: an empty capped bottle floats. What happens if you fill it with sand? (a) it floats higher (b) it turns blue (c) it sinks (d) it melts
2. 2.🔮 Predict: a bowl of water is left uncovered in the hot sun all day. What happens? (a) it turns to ice (b) some water evaporates (c) the water increases (d) it turns to salt
3. 3.🛟 Which scissors should children use to cut the paper? (a) gardening shears (b) a paper cutter (c) safety scissors (d) sharp kitchen shears
4. 4.🧺 Do we need a mirror for the water rainbow? (a) needed (b) not needed
5. 5.🧺 Which of these is needed for the float-or-sink test? (a) small test objects (b) a magnet (c) yeast (d) a mirror
6. 6.🧺 Do we need a battery cell for the float-or-sink test? (a) not needed (b) needed
7. 7.🎈 Why does the balloon rocket move along the string? (a) escaping air pushes it (b) the straw is heavy (c) a magnet pulls it (d) the string pulls it
8. 8.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) False (b) True
9. 9.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a towel for spills (b) a magnet (c) a results table (d) a tub of water
10. 10.☀️ What is white sunlight really made of? (a) only yellow light (b) tiny drops of water (c) tiny bits of dust (d) many colours mixed
11. 11.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same window”? (a) we change it (b) we measure it (c) we keep it the same
12. 12.📘 What is it called when water climbs up thin tubes or paper by itself? (a) melting (b) capillary action (c) magnetism (d) evaporation
13. 13.True or false: a balloon is not needed for the paper helicopter. (a) False (b) True
14. 14.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: the same glass is what we measure. (a) False (b) True
15. 15.💧 Which of these does not let water climb? (a) a paper towel (b) a flower stem (c) a sugar cube (d) a plastic ruler
16. 16.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same glass”? (a) we change it (b) we measure it (c) we keep it the same
17. 17.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a battery cell (c) a towel (d) a magnet
18. 18.🔍 Which is the odd one out? (a) ice becoming water (b) drops on a cold glass (c) butter going runny (d) snow turning to water
19. 19.🔍 Which is the odd one out? (a) an ice-cream stick (b) a steel spoon (c) a feather (d) a cork
20. 20.True or false: a magnet is not needed for the balloon rocket. (a) True (b) False
21. 21.True or false: two chairs is not needed for the balloon rocket. (a) True (b) False
22. 22.🛟 How should you check if the sugar has dissolved? (a) smell it closely (b) taste it (c) poke it with a finger (d) look for leftover grains
23. 23.🧺 Which of these is not needed for the float-or-sink test? (a) a battery cell (b) a tub of water (c) small test objects (d) a towel for spills
24. 24.True or false: the rocket goes backward. (a) False (b) True
25. 25.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) near a plug point (c) over a sink or bucket (d) on a bed
26. 26.🛟 What should you do after handling food colour? (a) wash your hands (b) rub your eyes (c) wipe them on walls (d) lick your fingers
27. 27.🔍 Which is the odd one out? (a) a pebble (b) air (c) a ping-pong ball (d) cooking oil
28. 28.🛟 Which is a safe rule for the balloon rocket? (a) put string round a neck (b) keep it away from faces (c) blow it till it bursts (d) aim it at your friend
29. 29.🍯 Which of these is denser than water? (a) an ice cube (b) cooking oil (c) a ping-pong ball (d) honey
30. 30.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same white paper”? (a) we change it (b) we keep it the same (c) we measure it
31. 31.🧺 Which of these is needed for the float-or-sink test? (a) a towel for spills (b) a magnet (c) a battery cell (d) a balloon
32. 32.🌈 In VIBGYOR, what number colour is indigo?
33. 33.True or false: air from the balloon goes backward. (a) False (b) True
34. 34.🔮 Predict: you put ice cubes on top of the cling film. What happens? (a) the bowl freezes (b) fewer drops form (c) the water turns red (d) more drops form
35. 35.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a paper clip (b) a balloon (c) a strip of paper (d) a pencil
36. 36.True or false: an iron nail sinks in water. (a) False (b) True
37. 37.🛟 What should you do with wet floors after the experiment? (a) slide on them (b) leave them wet (c) pour more water (d) wipe them dry
38. 38.🧺 Do we need yeast for the paper helicopter? (a) needed (b) not needed
39. 39.🥛 Which of these works by magnetism? (a) a drinking straw (b) a bicycle pump (c) a magnetic chess set (d) a vacuum cleaner
40. 40.🚁 Why does the paper helicopter fall slowly? (a) a magnet holds it (b) it has no weight (c) the floor pushes it (d) air pushes on its blades

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