Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 306 · 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 needed for the float-or-sink test? (a) yeast (b) a magnet (c) a tub of water (d) a balloon
2. 2.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same window”? (a) we keep it the same (b) we change it (c) we measure it
3. 3.🔮 A cork floats in tap water. What happens in very salty water? (a) it still floats (b) it sinks (c) it dissolves (d) it turns white
4. 4.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) two chairs (b) a long string (c) a magnet (d) sticky tape
5. 5.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the amount of sugar”? (a) we keep it the same (b) we change it (c) we measure it
6. 6.True or false: a steel spoon falls slowly through the air. (a) True (b) False
7. 7.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a towel for spills (b) a results table (c) a magnet (d) small test objects
8. 8.🛟 How should you check if the sugar has dissolved? (a) poke it with a finger (b) smell it closely (c) look for leftover grains (d) taste it
9. 9.🧺 Do we need a tub of water for the float-or-sink test? (a) not needed (b) needed
10. 10.💧 Which of these is freezing? (a) dew on morning grass (b) butter going runny (c) making ice lollies (d) drops on a cold glass
11. 11.True or false: a coin is less dense than water. (a) False (b) True
12. 12.True or false: a battery cell is not needed for the density tower. (a) True (b) False
13. 13.True or false: an open sheet of paper falls fast through the air. (a) False (b) True
14. 14.🧺 Which of these is needed for the water rainbow? (a) turmeric powder (b) a balloon (c) a clear glass of water (d) a magnet
15. 15.⚖️ 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) whether the card stays (b) how full the glass is (c) the same card
16. 16.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a magnet (b) a glass of water (c) food colour (d) a white flower
17. 17.🥄 Does sugar in icy water dissolve faster or slower? (a) faster (b) slower
18. 18.True or false: bright sunlight is not needed for the water rainbow. (a) True (b) False
19. 19.🔍 Which is the odd one out? (a) a feather (b) a glass marble (c) a crumpled paper ball (d) a stone
20. 20.🌦️ To see a rainbow in the sky, where must the Sun be? (a) behind you (b) in front of you (c) straight above you (d) under the ground
21. 21.🌈 In VIBGYOR, what number colour is violet?
22. 22.🧺 Which of these is not needed for the float-or-sink test? (a) a results table (b) a towel for spills (c) a balloon (d) a tub of water
23. 23.True or false: air from the balloon goes backward. (a) False (b) True
24. 24.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: the same three liquids is the one thing we change. (a) False (b) True
25. 25.True or false: yeast is not needed for the water rainbow. (a) False (b) True
26. 26.True or false: a small cup is not needed for the water cycle bowl. (a) True (b) False
27. 27.🔍 Which is the odd one out? (a) a glass marble (b) a piece of chalk (c) a rubber eraser (d) a steel spoon
28. 28.🛟 Why should only a grown-up handle any hot water? (a) hot water is heavy (b) hot water is magnetic (c) it changes colour (d) hot water can scald
29. 29.⚖️ 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 the one thing we change. (a) False (b) True
30. 30.🍯 Is a glass marble denser or less dense than water? (a) less dense than water (b) denser than water
31. 31.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) turmeric powder (b) small test objects (c) a tub of water (d) a towel for spills
32. 32.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) in the water layer (b) under the honey (c) on top of the oil (d) in the honey layer
33. 33.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the water temperature is what we measure. (a) False (b) True
34. 34.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: time for colour to show is the one thing we change. (a) True (b) False
35. 35.🛟 Which is the safe way to do the float-or-sink test? (a) play near a deep pond (b) wipe up spills at once (c) leave water on the floor (d) run around the tub
36. 36.True or false: a comb is needed for the dissolving test. (a) True (b) False
37. 37.🧺 Do we need a balloon for the water rainbow? (a) not needed (b) needed
38. 38.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) turmeric powder (b) honey (c) cooking oil (d) water with food colour
39. 39.True or false: a comb is not needed for the dissolving test. (a) True (b) False
40. 40.🔍 What do you see a day after a white flower stands in blue water? (a) the water turns green (b) the stem turns to ice (c) the petals turn bluish (d) the flower floats away

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