Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 15 · 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: sugar is not needed for the dissolving test. (a) False (b) True
2. 2.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
3. 3.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is the one thing we change? (a) the amount of sugar (b) the amount of water (c) the water temperature (d) the kind of sugar
4. 4.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) little air left inside (c) the card gets wet (d) it looks nicer
5. 5.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a magnet (c) a battery cell (d) a towel
6. 6.📘 What does “dense” mean? (a) heavy for its size (b) very thin (c) very hot (d) very colourful
7. 7.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: the order of the layers is kept the same. (a) False (b) True
8. 8.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the length of the stem is the one thing we change. (a) False (b) True
9. 9.🧺 Do we need a magnet for the paper helicopter? (a) not needed (b) needed
10. 10.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) air inside pushes back (c) water is hiding there (d) the cap is sticky
11. 11.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same tape”? (a) we measure it (b) we change it (c) we keep it the same
12. 12.True or false: honey is not needed for the density tower. (a) True (b) False
13. 13.🥄 Which of these does not dissolve in water? (a) table salt (b) sugar (c) chalk powder (d) food colour
14. 14.🚢 Why can a heavy steel ship float on the sea? (a) it has a magnet (b) sea water is warm (c) its hollow shape (d) steel is very light
15. 15.💧 In the covered bowl, where does the water vapour come from? (a) water warmed by the Sun (b) the air outside (c) the bowl itself (d) the cling film
16. 16.🛟 Which rule keeps you safe when working with sunlight? (a) stare at the Sun (b) look at it through glass (c) look at it in a mirror (d) never look at the Sun
17. 17.🍯 Which of these is less dense than water? (a) a glass marble (b) a coin (c) air (d) honey
18. 18.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is kept the same? (a) the same white paper (b) brightness of rainbow (c) the amount of water
19. 19.True or false: turmeric powder is needed for the coloured flower experiment. (a) True (b) False
20. 20.🔮 Predict: a stem is split in two, one half in red water and one in blue. What do the petals do? (a) they turn two colours (b) they all turn green (c) they fall off at once (d) they stay white
21. 21.🧺 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 results table (d) a mirror
22. 22.True or false: a towel for spills is not needed for the float-or-sink test. (a) True (b) False
23. 23.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is magnetic (c) it is hotter (d) it will not break
24. 24.🔮 Predict: you add two more paper clips. How does it fall? (a) it floats up (b) it stops in the air (c) slower (d) faster
25. 25.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a long string (b) a drinking straw (c) a balloon (d) a mirror
26. 26.💧 Which of these does not let water climb? (a) a piece of chalk (b) a sugar cube (c) a piece of foil (d) a paper towel
27. 27.⚖️ 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
28. 28.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: the order of the layers is what we measure. (a) False (b) True
29. 29.🧺 Do we need cooking oil for the density tower? (a) needed (b) not needed
30. 30.🔍 Which is the odd one out? (a) a plastic ruler (b) a cotton thread (c) a piece of chalk (d) a flower stem
31. 31.🧺 Do we need a magnet for the water rainbow? (a) needed (b) not needed
32. 32.🛟 Which is the safe way to do the float-or-sink test? (a) leave water on the floor (b) run around the tub (c) wipe up spills at once (d) play near a deep pond
33. 33.True or false: a rubber eraser does not let water climb. (a) True (b) False
34. 34.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same window is the one thing we change. (a) True (b) False
35. 35.🛟 What should you do with wet floors after the experiment? (a) slide on them (b) wipe them dry (c) pour more water (d) leave them wet
36. 36.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “time to reach the floor”? (a) we keep it the same (b) we measure it (c) we change it
37. 37.⚖️ 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 change it (b) we keep it the same (c) we measure it
38. 38.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same straw is the one thing we change. (a) True (b) False
39. 39.🔍 Which is the odd one out? (a) a fluff of cotton (b) a paper helicopter (c) a feather (d) a steel spoon
40. 40.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same card”? (a) we measure it (b) we keep it the same (c) we change it

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