Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 980 · 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.🔍 Which is the odd one out? (a) a steel spoon (b) a dry leaf (c) a glass marble (d) a pebble
2. 2.🔍 Sand is stirred into water. What do you see after a while? (a) it dissolves (b) it floats up (c) it settles at the bottom (d) it turns blue
3. 3.🔮 A cork floats in tap water. What happens in very salty water? (a) it dissolves (b) it still floats (c) it sinks (d) it turns white
4. 4.True or false: a sheet of white paper is not needed for the water rainbow. (a) True (b) False
5. 5.⚖️ 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 glass (b) whether the card stays (c) how full the glass is
6. 6.🛟 Why should we wipe up spilled oil at once? (a) oil makes it rain (b) oil attracts magnets (c) spilled oil is slippery (d) oil turns into honey
7. 7.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is what we measure? (a) the same glass (b) the order of the layers (c) the order of pouring (d) how much of each liquid
8. 8.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a sink or a bucket (b) a mirror (c) a stiff postcard (d) a towel
9. 9.🛟 Why should you not over-blow the balloon? (a) it gets too heavy (b) it can pop loudly (c) it changes colour (d) it turns into a kite
10. 10.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the tub of water”? (a) we change it (b) we keep it the same (c) we measure it
11. 11.True or false: a suction hook works by magnetism. (a) True (b) False
12. 12.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the water turns to ice (b) the card stays on (c) the card flies away (d) the glass breaks
13. 13.True or false: a cork sinks in water. (a) True (b) False
14. 14.True or false: warm water is needed for the dissolving test. (a) False (b) True
15. 15.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is kept the same? (a) brightness of rainbow (b) the amount of water (c) the time of day
16. 16.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: whether it floats is the one thing we change. (a) False (b) True
17. 17.🔍 Which is the odd one out? (a) an ice cube (b) air (c) honey (d) cooking oil
18. 18.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) a clock or timer (b) warm water (c) a mirror (d) sugar
19. 19.⚖️ 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
20. 20.True or false: sugar in icy water dissolves faster. (a) True (b) False
21. 21.🧺 Do we need a towel for spills for the float-or-sink test? (a) not needed (b) needed
22. 22.🥄 Which of these does not dissolve in water? (a) sugar (b) cooking oil (c) food colour (d) baking soda
23. 23.🛟 Which of these sinks in water? (a) a dry leaf (b) a metal key (c) a ping-pong ball (d) a feather
24. 24.🔮 Predict: you fold the two blades the other way. What changes? (a) it does not fall (b) it falls upward (c) it spins the other way (d) it turns blue
25. 25.💧 Which change is this: dew on morning grass? (a) evaporation (b) condensation (c) freezing (d) melting
26. 26.🥄 Why does sugar dissolve faster in warm water? (a) warm water is thicker (b) sugar likes the dark (c) particles move faster (d) cold water is wet
27. 27.🥄 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
28. 28.True or false: a balloon is needed for the card-on-a-glass trick. (a) True (b) False
29. 29.🔮 Predict: does stirring make sugar dissolve faster or slower? (a) not at all (b) faster (c) the same (d) slower
30. 30.True or false: sunlight is not needed for the water cycle bowl. (a) False (b) True
31. 31.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the kind of flower”? (a) we measure it (b) we change it (c) we keep it the same
32. 32.⚖️ 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) whether the card stays (b) how full the glass is (c) the same glass (d) the way we turn it
33. 33.🥄 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
34. 34.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic pin holder (c) a fridge magnet (d) a vacuum cleaner
35. 35.🧺 Which of these is needed for the coloured flower experiment? (a) a balloon (b) turmeric powder (c) food colour (d) a magnet
36. 36.🎈 When does the balloon rocket stop? (a) it never stops (b) when it gets cold (c) when the air runs out (d) when it turns blue
37. 37.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a small rainbow (b) a magnet (c) snow falling (d) a shadow of ice
38. 38.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same white paper is kept the same. (a) True (b) False
39. 39.🛟 Which is a safe rule for the balloon rocket? (a) keep it away from faces (b) blow it till it bursts (c) aim it at your friend (d) put string round a neck
40. 40.🧺 Do we need a sheet of white paper for the water rainbow? (a) needed (b) not needed

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