Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 970 · 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 does sugar dissolve faster in warm water? (a) sugar likes the dark (b) cold water is wet (c) particles move faster (d) warm water is thicker
2. 2.True or false: a magnet is needed for the coloured flower experiment. (a) False (b) True
3. 3.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) a small cup (b) a balloon (c) water (d) cling film
4. 4.🛟 Does an empty capped bottle float or sink in water? (a) floats (b) sinks
5. 5.⚖️ 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 what we measure. (a) True (b) False
6. 6.🔍 Which is the odd one out? (a) food colour (b) baking soda (c) sugar (d) sawdust
7. 7.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
8. 8.⚖️ 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 amount of water (b) time for colour to show (c) the length of the stem
9. 9.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is what we measure? (a) the kind of clay (b) whether it floats (c) the tub of water (d) the shape of the clay
10. 10.🧺 Which of these is needed for the coloured flower experiment? (a) a white flower (b) a mirror (c) a magnet (d) a battery cell
11. 11.🛟 What should you do with popped balloon pieces? (a) give them to a baby (b) throw them away safely (c) chew them (d) keep them in your mouth
12. 12.True or false: yeast is needed for the density tower. (a) False (b) True
13. 13.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the slope of the string”? (a) we change it (b) we keep it the same (c) we measure it
14. 14.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is the one thing we change? (a) the amount of water (b) the kind of flower (c) the length of the stem (d) the room it stands in
15. 15.🧺 Do we need a big bowl for the water cycle bowl? (a) not needed (b) needed
16. 16.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) nothing ever happens (b) it turns to plastic (c) it sinks at once (d) colour climbs up it
17. 17.🛟 Which is a safe rule for the balloon rocket? (a) keep it away from faces (b) blow it till it bursts (c) put string round a neck (d) aim it at your friend
18. 18.🧺 Which of these is needed for the water rainbow? (a) yeast (b) a mirror (c) a sheet of white paper (d) a battery cell
19. 19.True or false: cotton wool is needed for the dissolving test. (a) False (b) True
20. 20.🛟 Why should only a grown-up handle any hot water? (a) hot water can scald (b) it changes colour (c) hot water is magnetic (d) hot water is heavy
21. 21.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the person dropping is what we measure. (a) True (b) False
22. 22.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: the size of the bowl is what we measure. (a) False (b) True
23. 23.📘 What do we call light bending as it passes from air into water? (a) reflection (b) magnetism (c) refraction (d) evaporation
24. 24.🔮 Predict: an empty capped bottle floats. What happens if you fill it with sand? (a) it melts (b) it floats higher (c) it sinks (d) it turns blue
25. 25.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) on a bed (c) over a laptop (d) over a sink or bucket
26. 26.🛟 Why should the glass of water stand on a steady, flat place? (a) so the Sun moves (b) so it does not fall (c) so it turns blue (d) so it gets hot
27. 27.🚁 Which of these falls slowly through the air? (a) a stone (b) a glass marble (c) a crumpled paper ball (d) a fluff of cotton
28. 28.🧺 Which of these is needed for the float-or-sink test? (a) a balloon (b) small test objects (c) a mirror (d) a magnet
29. 29.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the amount of water”? (a) we measure it (b) we keep it the same (c) we change it
30. 30.📘 What does “dense” mean? (a) very colourful (b) heavy for its size (c) very thin (d) very hot
31. 31.🧺 Do we need honey for the density tower? (a) needed (b) not needed
32. 32.🧺 Do we need a tub of water for the float-or-sink test? (a) not needed (b) needed
33. 33.🚁 Why does the paper helicopter fall slowly? (a) it has no weight (b) a magnet holds it (c) the floor pushes it (d) air pushes on its blades
34. 34.🛟 Why should you not over-blow the balloon? (a) it can pop loudly (b) it turns into a kite (c) it changes colour (d) it gets too heavy
35. 35.🥄 Does a big sugar cube dissolve faster or slower? (a) slower (b) faster
36. 36.True or false: a magnet is not needed for the dissolving test. (a) False (b) True
37. 37.🧺 Which of these is not needed for the coloured flower experiment? (a) a few hours of waiting (b) food colour (c) a glass of water (d) yeast
38. 38.🍯 Which of these is denser than water? (a) cooking oil (b) a pebble (c) an ice cube (d) a cork
39. 39.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sheet of white paper (b) a clear glass of water (c) a magnet (d) bright sunlight
40. 40.🧺 Do we need a balloon for the density tower? (a) not needed (b) needed

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