Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 940 · 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 should we wipe up spilled oil at once? (a) oil makes it rain (b) oil attracts magnets (c) oil turns into honey (d) spilled oil is slippery
2. 2.🛟 Where is a safe place to drop the helicopter from? (a) a roof edge (b) from your raised hand (c) a wobbly chair (d) a high window ledge
3. 3.True or false: sand dissolves in water. (a) True (b) False
4. 4.True or false: a sheet of white paper is needed for the water rainbow. (a) False (b) True
5. 5.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) sticky tape (b) turmeric powder (c) a balloon (d) two chairs
6. 6.True or false: a big sugar cube dissolves faster. (a) False (b) True
7. 7.⚖️ 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 keep it the same (b) we measure it (c) we change it
8. 8.🧺 Do we need a white flower for the coloured flower experiment? (a) needed (b) not needed
9. 9.⚖️ 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) False (b) True
10. 10.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same glass is the one thing we change. (a) False (b) True
11. 11.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) in the honey layer (b) on top of the oil (c) in the water layer (d) under the honey
12. 12.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) True (b) False
13. 13.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) sunlight (b) ice cubes (c) yeast (d) a small cup
14. 14.🚀 In “push back, move forward”, which way does water from the oars go? (a) goes backward (b) goes forward
15. 15.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a magnet (c) a sheet of white paper (d) a sunny window
16. 16.🔍 Which is the odd one out? (a) honey (b) a glass marble (c) a ping-pong ball (d) very salty water
17. 17.🔍 Which is the odd one out? (a) snow turning to water (b) butter going runny (c) a misty bathroom mirror (d) ice becoming water
18. 18.🎈 What is the job of the straw on the string? (a) it blows air in (b) it makes it heavier (c) it holds water (d) it guides the balloon
19. 19.🔍 Which layer is on top in the honey-water-oil tower? (a) honey (b) coloured water (c) the spoon (d) cooking oil
20. 20.🧺 Do we need a magnet for the dissolving test? (a) needed (b) not needed
21. 21.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) the bottle is magnetic (c) the cap is sticky (d) air inside pushes back
22. 22.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the kind of paper is what we measure. (a) True (b) False
23. 23.🛟 Does an empty capped bottle float or sink in water? (a) floats (b) sinks
24. 24.🧺 Which of these is needed for the balloon rocket? (a) vinegar (b) a battery cell (c) sticky tape (d) turmeric powder
25. 25.📘 What does “dense” mean? (a) heavy for its size (b) very colourful (c) very hot (d) very thin
26. 26.🛟 Does an ice-cream stick float or sink in water? (a) floats (b) sinks
27. 27.🛟 What should you do after handling food colour? (a) rub your eyes (b) wipe them on walls (c) wash your hands (d) lick your fingers
28. 28.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is the one thing we change? (a) the time we wait (b) sun or shade (c) the cling film cover (d) how many drops form
29. 29.🔍 Sand is stirred into water. What do you see after a while? (a) it dissolves (b) it floats up (c) it settles at the bottom (d) it turns blue
30. 30.🧺 Do we need a few hours of waiting for the coloured flower experiment? (a) not needed (b) needed
31. 31.🌼 Why do the petals keep pulling water up the stem? (a) petals lose water to air (b) petals like colour (c) petals are magnetic (d) the stem is hot
32. 32.🧺 Which of these is not needed for the dissolving test? (a) a clock or timer (b) two clear glasses (c) cold water (d) a mirror
33. 33.🛟 Which rule keeps the density tower experiment safe? (a) taste each layer (b) throw the glass (c) pour it on the floor (d) do not lick the spoon
34. 34.🔮 Predict: the string slopes uphill. What happens? (a) it goes backward first (b) it speeds up (c) it travels farther (d) it travels less far
35. 35.💧 Dip a strip of cloth into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
36. 36.True or false: a mirror is needed for the water rainbow. (a) False (b) True
37. 37.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the paper clip is the one thing we change. (a) True (b) False
38. 38.🧺 Do we need a magnet for the water rainbow? (a) needed (b) not needed
39. 39.🚁 Dropped from a raised hand, does an open sheet of paper fall slowly or fast? (a) falls slowly (b) falls fast
40. 40.🧺 Which of these is not needed for the float-or-sink test? (a) a results table (b) a towel for spills (c) a tub of water (d) turmeric powder

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