Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 126 · 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.🛟 Why should you not over-blow the balloon? (a) it can pop loudly (b) it gets too heavy (c) it changes colour (d) it turns into a kite
2. 2.True or false: water a swimmer pushes goes backward. (a) True (b) False
3. 3.⚖️ 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 same glass”? (a) we change it (b) we keep it the same (c) we measure it
4. 4.True or false: a long string is not needed for the balloon rocket. (a) False (b) True
5. 5.🧺 Which of these is not needed for the water cycle bowl? (a) ice cubes (b) water (c) cling film (d) a battery cell
6. 6.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same glass”? (a) we change it (b) we measure it (c) we keep it the same
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: how much of each liquid is the one thing we change. (a) True (b) False
8. 8.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) air (c) smoke (d) water
9. 9.🧺 Do we need a ruler for the paper helicopter? (a) needed (b) not needed
10. 10.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the tub of water is kept the same. (a) False (b) True
11. 11.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: whether the card stays is kept the same. (a) True (b) False
12. 12.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) a big bowl (b) a small cup (c) a magnet (d) water
13. 13.⚖️ 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 what we measure. (a) True (b) False
14. 14.🧺 Which of these is needed for the dissolving test? (a) a balloon (b) warm water (c) cotton wool (d) a comb
15. 15.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is what we measure. (a) False (b) True
16. 16.⚖️ 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
17. 17.🌈 How many colours do we name in a rainbow (VIBGYOR)?
18. 18.💧 Why do water drops form on the outside of a glass of ice water? (a) ice escapes the glass (b) the glass leaks (c) vapour in air cools (d) the glass sweats
19. 19.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the time of day is kept the same. (a) False (b) True
20. 20.True or false: the rocket goes backward. (a) True (b) False
21. 21.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) safety scissors (b) a paper clip (c) a battery cell (d) a strip of paper
22. 22.🔍 Which is the odd one out? (a) a suction hook (b) a magnetic chess set (c) a bicycle pump (d) a vacuum cleaner
23. 23.True or false: a cotton thread lets water climb up it. (a) False (b) True
24. 24.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) cold water (b) warm water (c) sugar (d) honey
25. 25.🔮 A big log and a small pebble go into a pond. Which one floats? (a) both of them (b) the big log (c) the small pebble (d) neither of them
26. 26.🧺 Do we need a teaspoon for the dissolving test? (a) not needed (b) needed
27. 27.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to make it rain (c) to grow plants (d) to catch any spills
28. 28.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: distance it travels is the one thing we change. (a) False (b) True
29. 29.🧺 Do we need a balloon for the balloon rocket? (a) not needed (b) needed
30. 30.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the amount of water is the one thing we change. (a) True (b) False
31. 31.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is what we measure? (a) the amount of colour (b) the amount of water (c) the kind of flower (d) time for colour to show
32. 32.True or false: yeast is needed for the density tower. (a) False (b) True
33. 33.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a balloon (b) a white flower (c) a few hours of waiting (d) food colour
34. 34.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) the cap is sticky (c) water is hiding there (d) air inside pushes back
35. 35.🧺 Which of these is needed for the water cycle bowl? (a) a magnet (b) ice cubes (c) a battery cell (d) yeast
36. 36.🔮 Predict: an empty capped bottle floats. What happens if you fill it with sand? (a) it floats higher (b) it turns blue (c) it sinks (d) it melts
37. 37.🛟 Who should trim the flower stem? (a) a toddler (b) a grown-up (c) anyone, without looking (d) a pet
38. 38.🔮 Predict: you use a rough, thick string instead of a smooth one. (a) less friction (b) no change at all (c) it goes faster (d) more friction, less far
39. 39.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is kept the same? (a) sun or shade (b) the time we wait (c) how many drops form
40. 40.True or false: a fridge magnet works by air pressure. (a) True (b) False

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