Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 149 · 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 of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a stiff postcard (c) a balloon (d) a towel
2. 2.🧺 Which of these is not needed for the water rainbow? (a) a sunny window (b) a balloon (c) bright sunlight (d) a sheet of white paper
3. 3.True or false: a battery cell is not needed for the water rainbow. (a) True (b) False
4. 4.True or false: a paper clip is needed for the paper helicopter. (a) False (b) True
5. 5.🧺 Which of these is needed for the density tower? (a) a mirror (b) yeast (c) a battery cell (d) water with food colour
6. 6.🔮 Predict: a stem is split in two, one half in red water and one in blue. What do the petals do? (a) they stay white (b) they all turn green (c) they turn two colours (d) they fall off at once
7. 7.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same glass”? (a) we change it (b) we keep it the same (c) we measure it
8. 8.🔮 A cork floats in tap water. What happens in very salty water? (a) it turns white (b) it still floats (c) it sinks (d) it dissolves
9. 9.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
10. 10.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the amount of colour”? (a) we measure it (b) we keep it the same (c) we change it
11. 11.True or false: food colour is not needed for the coloured flower experiment. (a) True (b) False
12. 12.True or false: a suction hook works by air pressure. (a) True (b) False
13. 13.🔍 Which is the odd one out? (a) an ice-cream stick (b) a coin (c) a ping-pong ball (d) an ice cube
14. 14.🚁 Why does the paper helicopter fall slowly? (a) it has no weight (b) the floor pushes it (c) a magnet holds it (d) air pushes on its blades
15. 15.True or false: a long string is needed for the balloon rocket. (a) False (b) True
16. 16.🎈 When does the balloon rocket stop? (a) when it turns blue (b) when it gets cold (c) it never stops (d) when the air runs out
17. 17.🥄 Does a big sugar cube dissolve faster or slower? (a) faster (b) slower
18. 18.True or false: a puddle drying up is melting. (a) True (b) False
19. 19.⚖️ 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 “how much of each liquid”? (a) we measure it (b) we keep it the same (c) we change it
20. 20.🛟 Which rule keeps you safe when working with sunlight? (a) look at it through glass (b) never look at the Sun (c) stare at the Sun (d) look at it in a mirror
21. 21.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) a comb (b) sugar (c) cold water (d) a clock or timer
22. 22.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is what we measure? (a) how full the glass is (b) the same card (c) the way we turn it (d) whether the card stays
23. 23.🔍 Which is the odd one out? (a) a drinking straw (b) a magnetic chess set (c) a medicine dropper (d) a bicycle pump
24. 24.🛟 Does a coin float or sink in water? (a) sinks (b) floats
25. 25.🔍 Which is the odd one out? (a) drops on a cold glass (b) a pond icing over (c) drops under a pot lid (d) a misty bathroom mirror
26. 26.True or false: bright sunlight is needed for the water rainbow. (a) True (b) False
27. 27.🍯 Is an ice cube denser or less dense than water? (a) less dense than water (b) denser than water
28. 28.🧺 Which of these is needed for the float-or-sink test? (a) a magnet (b) a mirror (c) yeast (d) a tub of water
29. 29.🔮 Predict: which dissolves faster — a sugar cube or the same amount of powdered sugar? (a) neither of them (b) powdered sugar (c) both the same (d) the sugar cube
30. 30.True or false: a mirror is not needed for the balloon rocket. (a) True (b) False
31. 31.📘 What is water vapour? (a) a kind of smoke (b) tiny ice cubes (c) salty water (d) water as a gas
32. 32.True or false: a cork sinks in water. (a) True (b) False
33. 33.🛟 Why should we wipe up spilled oil at once? (a) oil turns into honey (b) oil makes it rain (c) oil attracts magnets (d) spilled oil is slippery
34. 34.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the kind of sugar is what we measure. (a) True (b) False
35. 35.🧺 Do we need bright sunlight for the water rainbow? (a) needed (b) not needed
36. 36.🔍 Which is the odd one out? (a) a ball of clay (b) a glass marble (c) a coin (d) an ice cube
37. 37.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is kept the same? (a) distance it travels (b) the same string (c) how big we blow it
38. 38.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: how full the glass is is kept the same. (a) False (b) True
39. 39.🛟 Which scissors should children use to cut the paper? (a) gardening shears (b) sharp kitchen shears (c) a paper cutter (d) safety scissors
40. 40.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the kind of flower”? (a) we measure it (b) we change it (c) we keep it the same

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