Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 78 · 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.⚖️ 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 keep it the same (c) we change it
2. 2.True or false: a balloon is needed for the dissolving test. (a) True (b) False
3. 3.🛟 What should you do with wet floors after the experiment? (a) slide on them (b) leave them wet (c) pour more water (d) wipe them dry
4. 4.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) little air left inside (c) it looks nicer (d) the card gets wet
5. 5.🚁 Which of these falls slowly through the air? (a) a stone (b) a crumpled paper ball (c) a feather (d) a glass marble
6. 6.🧺 Which of these is not needed for the float-or-sink test? (a) a tub of water (b) a battery cell (c) a results table (d) small test objects
7. 7.🥛 Which of these works by air pressure? (a) a drinking straw (b) a compass needle (c) a magnetic chess set (d) a fridge magnet
8. 8.🛟 Why should you not over-blow the balloon? (a) it turns into a kite (b) it can pop loudly (c) it gets too heavy (d) it changes colour
9. 9.🛟 Which is a safe rule for the balloon rocket? (a) blow it till it bursts (b) aim it at your friend (c) put string round a neck (d) keep it away from faces
10. 10.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) small test objects (b) a towel for spills (c) a results table (d) a magnet
11. 11.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the person dropping is what we measure. (a) False (b) True
12. 12.🧺 Do we need a battery cell for the coloured flower experiment? (a) not needed (b) needed
13. 13.🍯 Which of these is denser than water? (a) air (b) very salty water (c) an ice cube (d) cooking oil
14. 14.💧 Which of these lets water climb up it? (a) a steel spoon (b) a glass marble (c) a paper towel (d) a rubber eraser
15. 15.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) turmeric powder (b) a balloon (c) a drinking straw (d) sticky tape
16. 16.🛟 What should you do with popped balloon pieces? (a) chew them (b) give them to a baby (c) keep them in your mouth (d) throw them away safely
17. 17.🧺 Which of these is not needed for the dissolving test? (a) two clear glasses (b) sugar (c) cold water (d) cotton wool
18. 18.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to hide the corks (b) to win a prize (c) to keep children safe (d) to splash everyone
19. 19.🍯 Which of these is less dense than water? (a) a ping-pong ball (b) a glass marble (c) honey (d) a pebble
20. 20.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
21. 21.True or false: bright sunlight is not needed for the water rainbow. (a) True (b) False
22. 22.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “time to reach the floor”? (a) we measure it (b) we keep it the same (c) we change it
23. 23.🛟 Which is the safe way to do the float-or-sink test? (a) wipe up spills at once (b) play near a deep pond (c) run around the tub (d) leave water on the floor
24. 24.⚖️ 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 keep it the same (b) we change it (c) we measure it
25. 25.🔮 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
26. 26.🧺 Which of these is not needed for the dissolving test? (a) a clock or timer (b) sugar (c) a teaspoon (d) a balloon
27. 27.🧺 Which of these is needed for the coloured flower experiment? (a) a battery cell (b) a mirror (c) food colour (d) yeast
28. 28.🥚 A fresh egg sinks in plain water. What makes it float? (a) more plain water (b) lots of salt stirred in (c) a little shaking (d) a few ice cubes
29. 29.🧺 Do we need a balloon for the density tower? (a) not needed (b) needed
30. 30.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the amount of water”? (a) we keep it the same (b) we measure it (c) we change it
31. 31.🥄 Which of these dissolves in water? (a) sand (b) table salt (c) sawdust (d) chalk powder
32. 32.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the cling film cover”? (a) we keep it the same (b) we measure it (c) we change it
33. 33.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: the same three liquids is what we measure. (a) True (b) False
34. 34.⚖️ 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) time for colour to show (c) the kind of flower
35. 35.True or false: food colour is not needed for the coloured flower experiment. (a) True (b) False
36. 36.🛟 Why should the glass of water stand on a steady, flat place? (a) so it does not fall (b) so it turns blue (c) so it gets hot (d) so the Sun moves
37. 37.🧺 Do we need a magnet for the density tower? (a) not needed (b) needed
38. 38.🍯 Which of these is denser than water? (a) air (b) a cork (c) cooking oil (d) honey
39. 39.True or false: a comb is needed for the dissolving test. (a) False (b) True
40. 40.True or false: a white flower is needed for the coloured flower experiment. (a) False (b) True

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