Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 616 · 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 of these is denser than water? (a) a glass marble (b) a ping-pong ball (c) a cork (d) air
2. 2.🛟 Which rule keeps the density tower experiment safe? (a) throw the glass (b) pour it on the floor (c) do not lick the spoon (d) taste each layer
3. 3.🥛 Why is it best to fill the glass right to the top? (a) it looks nicer (b) little air left inside (c) water is heavier (d) the card gets wet
4. 4.🥄 Which of these dissolves in water? (a) cooking oil (b) sugar (c) sand (d) chalk powder
5. 5.🧺 Do we need vinegar for the balloon rocket? (a) needed (b) not needed
6. 6.🛟 Which of these floats on water? (a) a coin (b) a ping-pong ball (c) a pebble (d) a glass marble
7. 7.True or false: sugar in warm water dissolves faster. (a) False (b) True
8. 8.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a magnetic pin holder (c) a suction hook (d) a drinking straw
9. 9.💧 Which change is this: drops under a pot lid? (a) freezing (b) condensation (c) evaporation (d) melting
10. 10.⚖️ 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 what we measure. (a) False (b) True
11. 11.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a drinking straw (b) sticky tape (c) two chairs (d) a magnet
12. 12.🌈 How many colours do we name in a rainbow (VIBGYOR)?
13. 13.🛟 Why should we wipe up spilled oil at once? (a) oil turns into honey (b) oil attracts magnets (c) oil makes it rain (d) spilled oil is slippery
14. 14.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is what we measure? (a) brightness of rainbow (b) the time of day (c) the same glass (d) the same window
15. 15.True or false: a piece of thermocol floats on water. (a) True (b) False
16. 16.True or false: a comb is needed for the dissolving test. (a) False (b) True
17. 17.True or false: a battery cell is needed for the float-or-sink test. (a) True (b) False
18. 18.🥄 Which of these dissolves faster? (a) a big sugar cube (b) sugar in icy water (c) sugar stirred well (d) sugar left unstirred
19. 19.True or false: cooking oil is needed for the density tower. (a) False (b) True
20. 20.⚖️ 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 order of pouring”? (a) we keep it the same (b) we measure it (c) we change it
21. 21.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) sticky tape (b) a drinking straw (c) a mirror (d) a balloon
22. 22.🔮 What would change if the flower stood in plain water? (a) the flower glows (b) the stem turns blue (c) no colour change (d) the petals turn red
23. 23.True or false: sugar left unstirred dissolves slower. (a) False (b) True
24. 24.🧺 Do we need turmeric powder for the water cycle bowl? (a) not needed (b) needed
25. 25.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is the one thing we change? (a) how full the glass is (b) the same glass (c) whether the card stays (d) the same card
26. 26.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) honey (b) cooking oil (c) water with food colour (d) turmeric powder
27. 27.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the size of the bowl”? (a) we measure it (b) we keep it the same (c) we change it
28. 28.🔮 Predict: you fold the two blades the other way. What changes? (a) it spins the other way (b) it falls upward (c) it does not fall (d) it turns blue
29. 29.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a tall clear glass (b) a spoon (c) water with food colour (d) a magnet
30. 30.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) a sink or a bucket (c) a mirror (d) yeast
31. 31.🔮 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
32. 32.🔍 Which is the odd one out? (a) a paper helicopter (b) a glass marble (c) a crumpled paper ball (d) a stone
33. 33.🧺 Which of these is needed for the coloured flower experiment? (a) a balloon (b) a magnet (c) yeast (d) food colour
34. 34.🧺 Which of these is needed for the float-or-sink test? (a) a magnet (b) yeast (c) a balloon (d) a towel for spills
35. 35.🔮 Predict: you use a rough, thick string instead of a smooth one. (a) it goes faster (b) less friction (c) more friction, less far (d) no change at all
36. 36.🧺 Which of these is needed for the water cycle bowl? (a) a magnet (b) yeast (c) turmeric powder (d) a small cup
37. 37.📘 What does “dense” mean? (a) very colourful (b) very thin (c) very hot (d) heavy for its size
38. 38.🛟 Which is a safe rule for the balloon rocket? (a) blow it till it bursts (b) put string round a neck (c) aim it at your friend (d) keep it away from faces
39. 39.True or false: a metal key sinks in water. (a) False (b) True
40. 40.🧺 Do we need a mirror for the paper helicopter? (a) needed (b) not needed

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