Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 373 · 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.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a mirror (b) water with food colour (c) honey (d) cooking oil
2. 2.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the time we wait”? (a) we measure it (b) we keep it the same (c) we change it
3. 3.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same string”? (a) we keep it the same (b) we measure it (c) we change it
4. 4.True or false: a dry leaf sinks in water. (a) True (b) False
5. 5.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “time to reach the floor”? (a) we change it (b) we measure it (c) we keep it the same
6. 6.🧺 Which of these is needed for the paper helicopter? (a) a magnet (b) a mirror (c) a ruler (d) yeast
7. 7.🛟 Why should we wipe up spilled oil at once? (a) oil turns into honey (b) oil makes it rain (c) spilled oil is slippery (d) oil attracts magnets
8. 8.🧺 Do we need honey for the dissolving test? (a) needed (b) not needed
9. 9.🔮 Predict: you fold the two blades the other way. What changes? (a) it falls upward (b) it spins the other way (c) it does not fall (d) it turns blue
10. 10.🛟 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
11. 11.🔮 Predict: you blow the balloon up only a little. What happens? (a) it goes less far (b) it goes much farther (c) it flies off the string (d) it turns into a kite
12. 12.🛟 Why should the glass of water stand on a steady, flat place? (a) so it does not fall (b) so it gets hot (c) so it turns blue (d) so the Sun moves
13. 13.🛟 How should you check if the sugar has dissolved? (a) taste it (b) look for leftover grains (c) smell it closely (d) poke it with a finger
14. 14.🧺 Which of these is not needed for the density tower? (a) a tall clear glass (b) a spoon (c) a magnet (d) cooking oil
15. 15.True or false: chalk powder dissolves in water. (a) True (b) False
16. 16.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the amount of clay is kept the same. (a) True (b) False
17. 17.🧺 Do we need yeast for the water rainbow? (a) needed (b) not needed
18. 18.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a tub of water (b) a towel for spills (c) a magnet (d) a results table
19. 19.True or false: a small cup is needed for the water cycle bowl. (a) False (b) True
20. 20.🚁 Why do we clip a paper clip to the bottom of the helicopter? (a) to stop the spinning (b) to weigh down the bottom (c) to make it magnetic (d) to make it fall slower
21. 21.True or false: cooking oil is not needed for the density tower. (a) False (b) True
22. 22.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) honey (b) a tall clear glass (c) yeast (d) a spoon
23. 23.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is the one thing we change. (a) True (b) False
24. 24.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is heavier (c) it is hotter (d) it is magnetic
25. 25.True or false: a toy parachute falls fast through the air. (a) False (b) True
26. 26.🧺 Do we need a balloon for the density tower? (a) needed (b) not needed
27. 27.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) small test objects (b) a results table (c) a towel for spills (d) a mirror
28. 28.🧺 Which of these is needed for the float-or-sink test? (a) a battery cell (b) a balloon (c) yeast (d) a results table
29. 29.🥄 Which of these does not dissolve in water? (a) glucose powder (b) cooking oil (c) food colour (d) sugar
30. 30.🛟 Why should only a grown-up handle any hot water? (a) hot water is heavy (b) hot water can scald (c) it changes colour (d) hot water is magnetic
31. 31.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it floats away (b) it turns all red (c) it turns brighter (d) the rainbow fades
32. 32.💧 Dip a paper towel into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
33. 33.🧺 Do we need yeast for the density tower? (a) not needed (b) needed
34. 34.🧺 Do we need a battery cell for the float-or-sink test? (a) not needed (b) needed
35. 35.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: the time we wait is what we measure. (a) True (b) False
36. 36.True or false: water with food colour is not needed for the density tower. (a) False (b) True
37. 37.🌧️ The drops falling back into the bowl are like which part of the real water cycle? (a) sunshine (b) rain (c) lightning (d) wind
38. 38.🔮 Predict: a stem is split in two, one half in red water and one in blue. What do the petals do? (a) they all turn green (b) they turn two colours (c) they stay white (d) they fall off at once
39. 39.True or false: a mirror is needed for the card-on-a-glass trick. (a) True (b) False
40. 40.🌈 Why does sunlight make a rainbow through a glass of water? (a) water splits the light (b) the glass is painted (c) the paper makes colours (d) the water is coloured

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