Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 506 · 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.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) honey (b) cooking oil (c) a magnet (d) a tall clear glass
2. 2.True or false: a mirror is needed for the density tower. (a) True (b) False
3. 3.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same straw”? (a) we keep it the same (b) we measure it (c) we change it
4. 4.🧺 Which of these is not needed for the coloured flower experiment? (a) a mirror (b) a white flower (c) a glass of water (d) food colour
5. 5.🔍 Which is the odd one out? (a) a metal key (b) a steel spoon (c) a cork (d) a pebble
6. 6.True or false: a mirror is not needed for the balloon rocket. (a) True (b) False
7. 7.True or false: a ruler is needed for the paper helicopter. (a) False (b) True
8. 8.🔮 Predict: you put ice cubes on top of the cling film. What happens? (a) fewer drops form (b) more drops form (c) the water turns red (d) the bowl freezes
9. 9.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a glass of water (b) a white flower (c) a battery cell (d) food colour
10. 10.True or false: sugar left unstirred dissolves faster. (a) False (b) True
11. 11.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same tape”? (a) we keep it the same (b) we measure it (c) we change it
12. 12.True or false: a few hours of waiting is needed for the coloured flower experiment. (a) True (b) False
13. 13.True or false: an iron nail floats on water. (a) False (b) True
14. 14.⚖️ 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 glass is what we measure. (a) False (b) True
15. 15.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) magnets (b) balloons (c) clouds (d) prisms
16. 16.True or false: a mirror is needed for the dissolving test. (a) True (b) False
17. 17.🔍 What do you see after pouring honey, water and oil into one glass? (a) bubbles of gas (b) one mixed colour (c) three separate layers (d) the glass gets hot
18. 18.True or false: a cotton thread does not let water climb. (a) True (b) False
19. 19.🧺 Do we need small test objects for the float-or-sink test? (a) not needed (b) needed
20. 20.🔮 What would change if the flower stood in plain water? (a) the flower glows (b) the petals turn red (c) no colour change (d) the stem turns blue
21. 21.True or false: a balloon is needed for the water rainbow. (a) True (b) False
22. 22.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the stirring”? (a) we change it (b) we measure it (c) we keep it the same
23. 23.True or false: sugar in warm water dissolves slower. (a) True (b) False
24. 24.🍯 Which of these is denser than water? (a) a cork (b) an ice cube (c) very salty water (d) a ping-pong ball
25. 25.🚀 In “push back, move forward”, which way does the swimmer go? (a) goes backward (b) goes forward
26. 26.True or false: sugar stirred well dissolves faster. (a) True (b) False
27. 27.True or false: cotton wool is needed for the dissolving test. (a) False (b) True
28. 28.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a glass of water (c) a stiff postcard (d) a balloon
29. 29.🎈 Why does the balloon rocket move along the string? (a) a magnet pulls it (b) the straw is heavy (c) escaping air pushes it (d) the string pulls it
30. 30.🔍 Which is the odd one out? (a) a ping-pong ball (b) an ice cube (c) a steel spoon (d) a cork
31. 31.🚁 Dropped from a raised hand, does a paper helicopter fall slowly or fast? (a) falls slowly (b) falls fast
32. 32.🧺 Do we need a towel for spills for the float-or-sink test? (a) needed (b) not needed
33. 33.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same tape is kept the same. (a) True (b) False
34. 34.🧺 Do we need yeast for the coloured flower experiment? (a) needed (b) not needed
35. 35.🔍 Sugar is stirred into water and seems to disappear. Where did it go? (a) it vanished for ever (b) it sank as sand (c) it became air (d) it spread in the water
36. 36.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the amount of water is kept the same. (a) True (b) False
37. 37.📘 What is the push of air on a falling thing called? (a) magnetism (b) dissolving (c) floating (d) air resistance
38. 38.🛟 Why should you not over-blow the balloon? (a) it gets too heavy (b) it changes colour (c) it turns into a kite (d) it can pop loudly
39. 39.True or false: chalk powder does not dissolve in water. (a) True (b) False
40. 40.🔮 Predict: you use a rough, thick string instead of a smooth one. (a) it goes faster (b) more friction, less far (c) less friction (d) no change at all

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