Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 332 · 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? Which of these is what we measure? (a) how much of each liquid (b) the same three liquids (c) the order of the layers (d) the order of pouring
2. 2.🥚 A fresh egg sinks in plain water. What makes it float? (a) more plain water (b) a few ice cubes (c) lots of salt stirred in (d) a little shaking
3. 3.🌈 In VIBGYOR, what number colour is yellow?
4. 4.True or false: a magnet is not needed for the water rainbow. (a) True (b) False
5. 5.True or false: air from the balloon goes forward. (a) True (b) False
6. 6.🧺 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) a towel for spills (d) turmeric powder
7. 7.True or false: two clear glasses is not needed for the dissolving test. (a) False (b) True
8. 8.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a towel for spills (b) a magnet (c) a tub of water (d) small test objects
9. 9.🚀 Which of these goes backward? (a) the balloon (b) the swimmer (c) the rowing boat (d) water a swimmer pushes
10. 10.🔍 Which is the odd one out? (a) a rubber eraser (b) a glass marble (c) a piece of chalk (d) a piece of foil
11. 11.🎈 When does the balloon rocket stop? (a) when the air runs out (b) when it gets cold (c) when it turns blue (d) it never stops
12. 12.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) the card gets wet (c) little air left inside (d) it looks nicer
13. 13.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the room it stands in is kept the same. (a) True (b) False
14. 14.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “distance it travels”? (a) we keep it the same (b) we measure it (c) we change it
15. 15.🔍 Sand is stirred into water. What do you see after a while? (a) it dissolves (b) it settles at the bottom (c) it floats up (d) it turns blue
16. 16.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is kept the same? (a) time to reach the floor (b) the paper clip (c) the length of the blades
17. 17.📘 What does “dense” mean? (a) very colourful (b) very hot (c) very thin (d) heavy for its size
18. 18.🚢 Why can a heavy steel ship float on the sea? (a) steel is very light (b) it has a magnet (c) its hollow shape (d) sea water is warm
19. 19.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the amount of water”? (a) we keep it the same (b) we measure it (c) we change it
20. 20.True or false: a crumpled paper ball falls slowly through the air. (a) True (b) False
21. 21.True or false: turmeric powder is needed for the paper helicopter. (a) True (b) False
22. 22.🔍 Which is the odd one out? (a) a stone (b) a paper helicopter (c) a coin (d) a crumpled paper ball
23. 23.🧺 Do we need a magnet for the coloured flower experiment? (a) not needed (b) needed
24. 24.🧺 Which of these is needed for the water cycle bowl? (a) turmeric powder (b) a mirror (c) ice cubes (d) a balloon
25. 25.True or false: vinegar is needed for the balloon rocket. (a) True (b) False
26. 26.🔍 Which is the odd one out? (a) a pond icing over (b) drops on a cold glass (c) making ice lollies (d) water becoming ice
27. 27.🛟 Which rule keeps you safe when working with sunlight? (a) never look at the Sun (b) look at it through glass (c) look at it in a mirror (d) stare at the Sun
28. 28.🧺 Which of these is needed for the paper helicopter? (a) turmeric powder (b) a ruler (c) a magnet (d) a battery cell
29. 29.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
30. 30.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a suction hook (c) a compass needle (d) a drinking straw
31. 31.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) orange (b) red (c) violet (d) yellow
32. 32.🧺 Which of these is needed for the dissolving test? (a) sugar (b) a balloon (c) a comb (d) a magnet
33. 33.🚁 Dropped from a raised hand, does a stone fall slowly or fast? (a) falls slowly (b) falls fast
34. 34.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same string is the one thing we change. (a) True (b) False
35. 35.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the shape of the clay”? (a) we change it (b) we keep it the same (c) we measure it
36. 36.🔍 Which is the odd one out? (a) baking soda (b) sand (c) glucose powder (d) sugar
37. 37.🌼 How does coloured water reach the petals? (a) it rains on them (b) through the air (c) it is sprayed on (d) through tiny stem tubes
38. 38.🔮 Predict: a stem is split in two, one half in red water and one in blue. What do the petals do? (a) they all turn green (b) they fall off at once (c) they turn two colours (d) they stay white
39. 39.🔍 Which is the odd one out? (a) a stone (b) a steel spoon (c) an open sheet of paper (d) a glass marble
40. 40.True or false: a bicycle pump works by air pressure. (a) True (b) False

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