Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 650 · 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.💧 Which change is this: water becoming ice? (a) condensation (b) melting (c) freezing (d) evaporation
2. 2.True or false: a paper helicopter falls fast through the air. (a) False (b) True
3. 3.🚀 In “push back, move forward”, which way does air from the balloon go? (a) goes forward (b) goes backward
4. 4.True or false: a ping-pong ball floats on water. (a) True (b) False
5. 5.🧺 Do we need a sheet of white paper for the water rainbow? (a) needed (b) not needed
6. 6.🧺 Which of these is needed for the balloon rocket? (a) yeast (b) a drinking straw (c) a magnet (d) turmeric powder
7. 7.🎈 What is the job of the straw on the string? (a) it guides the balloon (b) it blows air in (c) it holds water (d) it makes it heavier
8. 8.⚖️ 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 order of the layers”? (a) we keep it the same (b) we change it (c) we measure it
9. 9.🧺 Which of these is not needed for the coloured flower experiment? (a) food colour (b) a glass of water (c) a few hours of waiting (d) yeast
10. 10.🥄 Which of these dissolves slower? (a) powdered sugar (b) sugar stirred well (c) sugar left unstirred (d) sugar in warm water
11. 11.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the kind of paper is kept the same. (a) False (b) True
12. 12.🚁 Which of these falls slowly through the air? (a) a feather (b) a stone (c) a crumpled paper ball (d) a glass marble
13. 13.🥄 Which of these dissolves in water? (a) sugar (b) chalk powder (c) sawdust (d) cooking oil
14. 14.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is the one thing we change? (a) distance it travels (b) the same straw (c) how big we blow it (d) the same string
15. 15.🛟 Which is a safe rule for the balloon rocket? (a) keep it away from faces (b) put string round a neck (c) aim it at your friend (d) blow it till it bursts
16. 16.🥛 Which of these works by magnetism? (a) a drinking straw (b) a medicine dropper (c) a suction hook (d) a fridge magnet
17. 17.🚁 Why do we clip a paper clip to the bottom of the helicopter? (a) to weigh down the bottom (b) to make it fall slower (c) to stop the spinning (d) to make it magnetic
18. 18.🛟 Which of these sinks in water? (a) an empty capped bottle (b) an ice-cream stick (c) a metal key (d) an ice cube
19. 19.True or false: a tall clear glass is not needed for the density tower. (a) True (b) False
20. 20.🧺 Which of these is needed for the density tower? (a) a mirror (b) a balloon (c) a spoon (d) a battery cell
21. 21.🧺 Which of these is not needed for the water rainbow? (a) a sheet of white paper (b) a battery cell (c) bright sunlight (d) a clear glass of water
22. 22.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the stirring”? (a) we change it (b) we measure it (c) we keep it the same
23. 23.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the way we turn it is kept the same. (a) True (b) False
24. 24.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: the cling film cover is what we measure. (a) True (b) False
25. 25.🧺 Do we need a battery cell for the density tower? (a) needed (b) not needed
26. 26.🌈 How many colours do we name in a rainbow (VIBGYOR)?
27. 27.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the slope of the string is what we measure. (a) True (b) False
28. 28.🚢 Why can a heavy steel ship float on the sea? (a) its hollow shape (b) steel is very light (c) it has a magnet (d) sea water is warm
29. 29.🔍 Which layer is on top in the honey-water-oil tower? (a) cooking oil (b) the spoon (c) coloured water (d) honey
30. 30.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same string”? (a) we keep it the same (b) we measure it (c) we change it
31. 31.True or false: a coin floats on water. (a) False (b) True
32. 32.True or false: a mirror is not needed for the water rainbow. (a) True (b) False
33. 33.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) sand (c) air (d) smoke
34. 34.True or false: a clock or timer is needed for the dissolving test. (a) False (b) True
35. 35.🔍 Which is the odd one out? (a) a glass marble (b) a coin (c) an ice cube (d) honey
36. 36.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) ice cubes (b) water (c) cling film (d) turmeric powder
37. 37.True or false: an ice cube is denser than water. (a) False (b) True
38. 38.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a few hours of waiting (b) food colour (c) a glass of water (d) a battery cell
39. 39.🔮 Predict: an empty capped bottle floats. What happens if you fill it with sand? (a) it turns blue (b) it melts (c) it sinks (d) it floats higher
40. 40.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is the one thing we change? (a) the amount of clay (b) the tub of water (c) the shape of the clay (d) the kind of clay

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