Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 755 · 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 falls fast through the air? (a) a crumpled paper ball (b) an open sheet of paper (c) a fluff of cotton (d) a feather
2. 2.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a shadow of ice (b) a magnet (c) snow falling (d) a small rainbow
3. 3.⚖️ 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
4. 4.🧺 Which of these is not needed for the balloon rocket? (a) a balloon (b) a mirror (c) sticky tape (d) a long string
5. 5.🧺 Which of these is needed for the float-or-sink test? (a) a tub of water (b) a battery cell (c) a magnet (d) a balloon
6. 6.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a stiff postcard (c) a sink or a bucket (d) yeast
7. 7.🛟 Which scissors should children use to cut the paper? (a) sharp kitchen shears (b) safety scissors (c) gardening shears (d) a paper cutter
8. 8.🧺 Which of these is not needed for the paper helicopter? (a) a ruler (b) a pencil (c) safety scissors (d) a battery cell
9. 9.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
10. 10.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a mirror (b) a clear glass of water (c) a sheet of white paper (d) bright sunlight
11. 11.🔍 Which layer is on top in the honey-water-oil tower? (a) cooking oil (b) honey (c) coloured water (d) the spoon
12. 12.🍯 Is very salty water denser or less dense than water? (a) less dense than water (b) denser than water
13. 13.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a glass of water (c) a balloon (d) a sink or a bucket
14. 14.True or false: a mirror is needed for the water rainbow. (a) True (b) False
15. 15.🧺 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) turmeric powder (d) a glass of water
16. 16.True or false: yeast is not needed for the card-on-a-glass trick. (a) True (b) False
17. 17.🔍 Which is the odd one out? (a) wet clothes drying (b) snow turning to water (c) wet hair drying (d) sweat drying on skin
18. 18.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) two chairs (b) a battery cell (c) a long string (d) a drinking straw
19. 19.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is kept the same? (a) how full the glass is (b) whether the card stays (c) the way we turn it
20. 20.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) air (c) water (d) sand
21. 21.⚖️ 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) True (b) False
22. 22.⚖️ 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 kind of flower (b) the amount of water (c) the room it stands in (d) time for colour to show
23. 23.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a balloon (b) a clear glass of water (c) bright sunlight (d) a sunny window
24. 24.🧺 Do we need a mirror for the paper helicopter? (a) needed (b) not needed
25. 25.True or false: a glass of water is not needed for the coloured flower experiment. (a) True (b) False
26. 26.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a tall clear glass (b) a mirror (c) honey (d) a spoon
27. 27.🥄 Which of these dissolves faster? (a) sugar stirred well (b) sugar left unstirred (c) a big sugar cube (d) sugar in icy water
28. 28.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is the one thing we change? (a) the amount of water (b) the same glass (c) the same white paper (d) brightness of rainbow
29. 29.🛟 Why should only a grown-up handle any hot water? (a) hot water is heavy (b) it changes colour (c) hot water is magnetic (d) hot water can scald
30. 30.🥚 A fresh egg sinks in plain water. What makes it float? (a) a few ice cubes (b) lots of salt stirred in (c) more plain water (d) a little shaking
31. 31.True or false: turmeric powder is needed for the water rainbow. (a) False (b) True
32. 32.🔮 A ball of clay sinks. What happens if you press it into a thin boat shape? (a) it turns to stone (b) it dissolves (c) it sinks faster (d) it can float
33. 33.🧺 Which of these is not needed for the paper helicopter? (a) a ruler (b) safety scissors (c) a balloon (d) a pencil
34. 34.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same white paper”? (a) we keep it the same (b) we change it (c) we measure it
35. 35.🔍 Which is the odd one out? (a) dew on morning grass (b) wet clothes drying (c) drops under a pot lid (d) drops on a cold glass
36. 36.True or false: honey is not needed for the density tower. (a) False (b) True
37. 37.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is kept the same? (a) how big we blow it (b) the same straw (c) distance it travels
38. 38.🛟 Which is the safe way to do the float-or-sink test? (a) play near a deep pond (b) leave water on the floor (c) wipe up spills at once (d) run around the tub
39. 39.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a paper clip (b) a ruler (c) turmeric powder (d) a pencil
40. 40.🛟 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

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