Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 678 · 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.True or false: air is less dense than water. (a) True (b) False
2. 2.🔮 Predict: the string slopes uphill. What happens? (a) it speeds up (b) it travels farther (c) it travels less far (d) it goes backward first
3. 3.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) sand (c) water (d) air
4. 4.🔍 Which is the odd one out? (a) a paper towel (b) a cotton thread (c) a steel spoon (d) a strip of cloth
5. 5.🛟 Where is a safe place to drop the helicopter from? (a) a high window ledge (b) from your raised hand (c) a wobbly chair (d) a roof edge
6. 6.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is what we measure? (a) the amount of water (b) the stirring (c) the water temperature (d) time to dissolve
7. 7.🚀 Which of these goes forward? (a) air from the balloon (b) the rocket (c) gas from the rocket (d) water a swimmer pushes
8. 8.True or false: a balloon is not needed for the float-or-sink test. (a) False (b) True
9. 9.🌈 In VIBGYOR, what number colour is blue?
10. 10.🧺 Which of these is not needed for the paper helicopter? (a) a pencil (b) a ruler (c) safety scissors (d) a magnet
11. 11.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is kept the same? (a) the length of the stem (b) the amount of colour (c) time for colour to show
12. 12.🧺 Which of these is needed for the dissolving test? (a) a magnet (b) a balloon (c) warm water (d) a comb
13. 13.🔍 Sugar is stirred into water and seems to disappear. Where did it go? (a) it became air (b) it sank as sand (c) it spread in the water (d) it vanished for ever
14. 14.True or false: a sheet of white paper is not needed for the water rainbow. (a) True (b) False
15. 15.🔮 Predict: a bowl of water is left uncovered in the hot sun all day. What happens? (a) some water evaporates (b) it turns to ice (c) the water increases (d) it turns to salt
16. 16.True or false: a balloon is needed for the density tower. (a) False (b) True
17. 17.🧺 Do we need a big bowl for the water cycle bowl? (a) needed (b) not needed
18. 18.True or false: small test objects is not needed for the float-or-sink test. (a) False (b) True
19. 19.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “how big we blow it”? (a) we keep it the same (b) we change it (c) we measure it
20. 20.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: brightness of rainbow is the one thing we change. (a) False (b) True
21. 21.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) water with food colour (b) cooking oil (c) a balloon (d) a tall clear glass
22. 22.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
23. 23.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) a sheet of white paper (c) a balloon (d) a sunny window
24. 24.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a balloon (c) a battery cell (d) a towel
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) the same glass (b) how full the glass is (c) whether the card stays (d) the way we turn it
26. 26.🧺 Do we need yeast for the float-or-sink test? (a) needed (b) not needed
27. 27.🛟 Who should pour the warm water in the dissolving test? (a) a grown-up (b) the youngest child (c) nobody needs to (d) a friend who is running
28. 28.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) False (b) True
29. 29.📘 What is it called when water climbs up thin tubes or paper by itself? (a) magnetism (b) melting (c) evaporation (d) capillary action
30. 30.True or false: sugar in warm water dissolves slower. (a) False (b) True
31. 31.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same string”? (a) we measure it (b) we change it (c) we keep it the same
32. 32.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same glass is what we measure. (a) True (b) False
33. 33.🧺 Do we need turmeric powder for the balloon rocket? (a) needed (b) not needed
34. 34.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “time for colour to show”? (a) we keep it the same (b) we change it (c) we measure it
35. 35.🔍 Which is the odd one out? (a) a steel spoon (b) a sugar cube (c) a piece of foil (d) a plastic ruler
36. 36.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: the size of the bowl is what we measure. (a) True (b) False
37. 37.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a towel (c) a magnet (d) a sink or a bucket
38. 38.🧺 Which of these is needed for the dissolving test? (a) honey (b) a comb (c) a magnet (d) two clear glasses
39. 39.🧺 Which of these is not needed for the paper helicopter? (a) a paper clip (b) a strip of paper (c) a ruler (d) a mirror
40. 40.🔮 Predict: an empty capped bottle floats. What happens if you fill it with sand? (a) it turns blue (b) it floats higher (c) it sinks (d) it melts

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