Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 655 · 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: cooking oil is less dense than water. (a) True (b) False
2. 2.True or false: air from the balloon goes backward. (a) True (b) False
3. 3.🌊 What pushes a floating cork upward? (a) the tub (b) the cork itself (c) the water (d) the air above
4. 4.True or false: a small cup is needed for the water cycle bowl. (a) True (b) False
5. 5.🛟 Does a dry leaf float or sink in water? (a) floats (b) sinks
6. 6.🧺 Which of these is not needed for the dissolving test? (a) cold water (b) a clock or timer (c) a mirror (d) a teaspoon
7. 7.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the drop height”? (a) we change it (b) we keep it the same (c) we measure it
8. 8.🔮 Predict: an empty capped bottle floats. What happens if you fill it with sand? (a) it sinks (b) it turns blue (c) it melts (d) it floats higher
9. 9.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the amount of water is kept the same. (a) False (b) True
10. 10.True or false: ice cubes is needed for the water cycle bowl. (a) False (b) True
11. 11.🧺 Do we need turmeric powder for the balloon rocket? (a) needed (b) not needed
12. 12.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
13. 13.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the time of day”? (a) we change it (b) we keep it the same (c) we measure it
14. 14.True or false: a results table is not needed for the float-or-sink test. (a) True (b) False
15. 15.🧺 Which of these is needed for the float-or-sink test? (a) a battery cell (b) a magnet (c) a tub of water (d) yeast
16. 16.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same tape”? (a) we change it (b) we keep it the same (c) we measure it
17. 17.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is the one thing we change? (a) the same straw (b) distance it travels (c) the same string (d) how big we blow it
18. 18.🧺 Do we need a balloon for the paper helicopter? (a) not needed (b) needed
19. 19.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a pencil (b) safety scissors (c) a balloon (d) a ruler
20. 20.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) the card gets wet (c) little air left inside (d) it looks nicer
21. 21.🧺 Do we need a balloon for the coloured flower experiment? (a) needed (b) not needed
22. 22.🧺 Which of these is not needed for the coloured flower experiment? (a) a glass of water (b) turmeric powder (c) a few hours of waiting (d) food colour
23. 23.🧺 Which of these is needed for the float-or-sink test? (a) yeast (b) a battery cell (c) a towel for spills (d) turmeric powder
24. 24.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to keep children safe (b) to hide the corks (c) to splash everyone (d) to win a prize
25. 25.True or false: honey is not needed for the density tower. (a) False (b) True
26. 26.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a paper clip (b) a ruler (c) a mirror (d) a pencil
27. 27.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same window is kept the same. (a) True (b) False
28. 28.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is kept the same? (a) the order of the layers (b) the same three liquids (c) the order of pouring
29. 29.🔍 Which is the odd one out? (a) a flower stem (b) a strip of cloth (c) a rubber eraser (d) a piece of chalk
30. 30.🍯 Is a coin denser or less dense than water? (a) denser than water (b) less dense than water
31. 31.🧺 Do we need a big bowl for the water cycle bowl? (a) not needed (b) needed
32. 32.True or false: an ice cube sinks in water. (a) False (b) True
33. 33.True or false: bright sunlight is not needed for the water rainbow. (a) True (b) False
34. 34.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a pencil (b) a ruler (c) a strip of paper (d) a magnet
35. 35.True or false: a glass marble floats on water. (a) False (b) True
36. 36.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the amount of water is what we measure. (a) True (b) False
37. 37.True or false: yeast is not needed for the balloon rocket. (a) True (b) False
38. 38.True or false: a steel spoon lets water climb up it. (a) False (b) True
39. 39.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: how big we blow it is the one thing we change. (a) True (b) False
40. 40.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a towel for spills (b) small test objects (c) a mirror (d) a results table

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