Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 41 · 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 — do the layers end up in the same order if we pour the liquids in a different order? True or false: the order of pouring is the one thing we change. (a) True (b) False
2. 2.🥄 Does a big sugar cube dissolve faster or slower? (a) faster (b) slower
3. 3.🧺 Which of these is needed for the paper helicopter? (a) turmeric powder (b) a strip of paper (c) a mirror (d) a balloon
4. 4.True or false: a balloon is needed for the density tower. (a) True (b) False
5. 5.🥄 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
6. 6.🧺 Do we need a magnet for the density tower? (a) needed (b) not needed
7. 7.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the water temperature is kept the same. (a) False (b) True
8. 8.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is what we measure? (a) the same window (b) the amount of water (c) the same white paper (d) brightness of rainbow
9. 9.🔮 A cork floats in tap water. What happens in very salty water? (a) it dissolves (b) it turns white (c) it still floats (d) it sinks
10. 10.📘 Every push has an equal push in the opposite direction. Which toy shows this? (a) a fridge magnet (b) a mirror (c) a sundial (d) a balloon rocket
11. 11.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a sink or a bucket (c) yeast (d) a stiff postcard
12. 12.True or false: turmeric powder is needed for the paper helicopter. (a) True (b) False
13. 13.🚀 Which of these goes forward? (a) gas from the rocket (b) water a swimmer pushes (c) air from the balloon (d) the rocket
14. 14.True or false: an ice cube is denser than water. (a) False (b) True
15. 15.🛟 Which of these floats on water? (a) a ping-pong ball (b) a coin (c) a steel spoon (d) a pebble
16. 16.🔮 Predict: wet clothes are hung out on a sunny, windy day. How do they dry? (a) faster (b) they never dry (c) slower (d) they turn to ice
17. 17.True or false: yeast is needed for the balloon rocket. (a) False (b) True
18. 18.True or false: yeast is not needed for the paper helicopter. (a) False (b) True
19. 19.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the amount of colour is kept the same. (a) True (b) False
20. 20.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same glass is kept the same. (a) False (b) True
21. 21.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is what we measure? (a) how big we blow it (b) the slope of the string (c) the same tape (d) distance it travels
22. 22.🔮 Predict: you blow the balloon up only a little. What happens? (a) it goes less far (b) it goes much farther (c) it turns into a kite (d) it flies off the string
23. 23.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the amount of water”? (a) we measure it (b) we change it (c) we keep it the same
24. 24.🥚 A fresh egg sinks in plain water. What makes it float? (a) more plain water (b) a little shaking (c) a few ice cubes (d) lots of salt stirred in
25. 25.🛟 Which rule keeps you safe when working with sunlight? (a) stare at the Sun (b) never look at the Sun (c) look at it in a mirror (d) look at it through glass
26. 26.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a glass of water (c) a battery cell (d) a sink or a bucket
27. 27.💧 Which of these does not let water climb? (a) a piece of chalk (b) a sugar cube (c) a cotton thread (d) a steel spoon
28. 28.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) red (b) yellow (c) violet (d) orange
29. 29.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) in the honey layer (b) in the water layer (c) under the honey (d) on top of the oil
30. 30.🛟 Which scissors should children use to cut the paper? (a) sharp kitchen shears (b) a paper cutter (c) gardening shears (d) safety scissors
31. 31.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “whether the card stays”? (a) we change it (b) we keep it the same (c) we measure it
32. 32.🛟 Where is a safe place to drop the helicopter from? (a) a wobbly chair (b) a high window ledge (c) a roof edge (d) from your raised hand
33. 33.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “whether it floats”? (a) we keep it the same (b) we measure it (c) we change it
34. 34.🛟 Which is a safe rule for the balloon rocket? (a) put string round a neck (b) keep it away from faces (c) aim it at your friend (d) blow it till it bursts
35. 35.🧺 Which of these is needed for the float-or-sink test? (a) a balloon (b) turmeric powder (c) a magnet (d) a results table
36. 36.🧺 Which of these is not needed for the water cycle bowl? (a) a small cup (b) cling film (c) turmeric powder (d) a big bowl
37. 37.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “how big we blow it”? (a) we change it (b) we keep it the same (c) we measure it
38. 38.⚖️ 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 measure it (c) we keep it the same
39. 39.⚖️ 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 three liquids”? (a) we measure it (b) we change it (c) we keep it the same
40. 40.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to win a prize (b) to splash everyone (c) to keep children safe (d) to hide the corks

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