Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 186 · 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.🛟 Does a feather float or sink in water? (a) sinks (b) floats
2. 2.⚖️ 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 order of pouring”? (a) we measure it (b) we change it (c) we keep it the same
3. 3.🎈 Why does the balloon rocket move along the string? (a) a magnet pulls it (b) the string pulls it (c) the straw is heavy (d) escaping air pushes it
4. 4.🔍 Which is the odd one out? (a) drops under a pot lid (b) water becoming ice (c) a pond icing over (d) making ice lollies
5. 5.🔮 Predict: a stem is split in two, one half in red water and one in blue. What do the petals do? (a) they fall off at once (b) they stay white (c) they all turn green (d) they turn two colours
6. 6.True or false: a tub of water is not needed for the float-or-sink test. (a) False (b) True
7. 7.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns all red (b) it turns brighter (c) it floats away (d) the rainbow fades
8. 8.True or false: yeast is needed for the paper helicopter. (a) True (b) False
9. 9.🌈 How many colours do we name in a rainbow (VIBGYOR)?
10. 10.True or false: a steel spoon floats on water. (a) True (b) False
11. 11.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the kind of clay is kept the same. (a) False (b) True
12. 12.🔮 Predict: you put ice cubes on top of the cling film. What happens? (a) more drops form (b) fewer drops form (c) the water turns red (d) the bowl freezes
13. 13.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) cling film (b) sunlight (c) turmeric powder (d) ice cubes
14. 14.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same tape is the one thing we change. (a) True (b) False
15. 15.True or false: a coin floats on water. (a) False (b) True
16. 16.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) two chairs (b) a balloon (c) a long string (d) yeast
17. 17.🔍 Which is the odd one out? (a) a pebble (b) honey (c) a glass marble (d) a cork
18. 18.⚖️ 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 amount of colour (b) the kind of flower (c) time for colour to show (d) the length of the stem
19. 19.🛟 Which of these sinks in water? (a) a cork (b) a coin (c) a dry leaf (d) a ping-pong ball
20. 20.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) yeast (b) a spoon (c) water with food colour (d) a tall clear glass
21. 21.🥄 Which of these dissolves faster? (a) sugar left unstirred (b) sugar in icy water (c) sugar stirred well (d) a big sugar cube
22. 22.True or false: cotton wool is needed for the dissolving test. (a) False (b) True
23. 23.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a magnet (b) a glass of water (c) a white flower (d) food colour
24. 24.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is the one thing we change? (a) how much of each liquid (b) the same glass (c) the order of the layers (d) the order of pouring
25. 25.🛟 Does a cork float or sink in water? (a) floats (b) sinks
26. 26.⚖️ 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) whether the card stays (b) the way we turn it (c) how full the glass is (d) the same glass
27. 27.🍯 Why does honey sink to the bottom of the glass? (a) it is the coldest (b) it is yellow (c) it is the stickiest (d) it is the densest
28. 28.🔮 Predict: an empty capped bottle floats. What happens if you fill it with sand? (a) it turns blue (b) it sinks (c) it floats higher (d) it melts
29. 29.🧺 Do we need turmeric powder for the density tower? (a) needed (b) not needed
30. 30.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the room it stands in”? (a) we measure it (b) we change it (c) we keep it the same
31. 31.🥄 Which of these dissolves faster? (a) sugar left unstirred (b) a big sugar cube (c) sugar in icy water (d) sugar in warm water
32. 32.True or false: a plastic ruler lets water climb up it. (a) True (b) False
33. 33.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same window is the one thing we change. (a) False (b) True
34. 34.🧺 Do we need a towel for spills for the float-or-sink test? (a) not needed (b) needed
35. 35.🚀 In “push back, move forward”, which way does air from the balloon go? (a) goes backward (b) goes forward
36. 36.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a results table (b) a tub of water (c) turmeric powder (d) small test objects
37. 37.🥄 Does sugar stirred well dissolve faster or slower? (a) slower (b) faster
38. 38.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
39. 39.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same window is kept the same. (a) True (b) False
40. 40.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) small test objects (b) yeast (c) a results table (d) a towel for spills

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