Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 653 · 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.🔮 Predict: a bowl of water is left uncovered in the hot sun all day. What happens? (a) the water increases (b) it turns to ice (c) it turns to salt (d) some water evaporates
2. 2.True or false: a long string is needed for the balloon rocket. (a) True (b) False
3. 3.🛟 How should you check if the sugar has dissolved? (a) look for leftover grains (b) smell it closely (c) taste it (d) poke it with a finger
4. 4.True or false: a dry leaf floats on water. (a) True (b) False
5. 5.🛟 Which of these floats on water? (a) a steel spoon (b) a glass marble (c) an ice-cream stick (d) a pebble
6. 6.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) water with food colour (b) a tall clear glass (c) turmeric powder (d) cooking oil
7. 7.True or false: a sunny window is needed for the water rainbow. (a) True (b) False
8. 8.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) magnets (b) balloons (c) prisms (d) clouds
9. 9.💧 Which of these is melting? (a) a pond icing over (b) butter going runny (c) a puddle drying up (d) sweat drying on skin
10. 10.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is kept the same? (a) sun or shade (b) how many drops form (c) the amount of water
11. 11.True or false: bright sunlight is not needed for the water rainbow. (a) True (b) False
12. 12.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a glass of water (b) a few hours of waiting (c) a battery cell (d) food colour
13. 13.True or false: a balloon is not needed for the card-on-a-glass trick. (a) True (b) False
14. 14.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the slope of the string is the one thing we change. (a) True (b) False
15. 15.🚁 Which of these falls slowly through the air? (a) a fluff of cotton (b) a steel spoon (c) a glass marble (d) a crumpled paper ball
16. 16.🥄 Which of these dissolves in water? (a) chalk powder (b) sawdust (c) glucose powder (d) sand
17. 17.🚀 In “push back, move forward”, which way does the rowing boat go? (a) goes forward (b) goes backward
18. 18.True or false: a medicine dropper works by magnetism. (a) True (b) False
19. 19.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the way we turn it is kept the same. (a) True (b) False
20. 20.True or false: a long string is not needed for the balloon rocket. (a) False (b) True
21. 21.🌈 How many colours do we name in a rainbow (VIBGYOR)?
22. 22.🧺 Do we need a clock or timer for the dissolving test? (a) not needed (b) needed
23. 23.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the kind of flower”? (a) we keep it the same (b) we change it (c) we measure it
24. 24.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the length of the blades is the one thing we change. (a) True (b) False
25. 25.🫗 Why does cooking oil float on top of water? (a) oil is less dense (b) oil is heavier (c) oil is hot (d) oil is sticky
26. 26.🧺 Which of these is not needed for the float-or-sink test? (a) a results table (b) a towel for spills (c) turmeric powder (d) small test objects
27. 27.🧺 Which of these is not needed for the paper helicopter? (a) a magnet (b) a ruler (c) a strip of paper (d) a paper clip
28. 28.True or false: a medicine dropper works by air pressure. (a) True (b) False
29. 29.True or false: a ping-pong ball is less dense than water. (a) True (b) False
30. 30.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a long string (b) a balloon (c) a drinking straw (d) a magnet
31. 31.⚖️ 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) the same glass (b) the order of pouring (c) the order of the layers (d) how much of each liquid
32. 32.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) water (b) turmeric powder (c) a small cup (d) sunlight
33. 33.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the kind of clay”? (a) we keep it the same (b) we measure it (c) we change it
34. 34.🧺 Which of these is not needed for the float-or-sink test? (a) a tub of water (b) a towel for spills (c) a balloon (d) a results table
35. 35.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is what we measure? (a) the kind of clay (b) the tub of water (c) the shape of the clay (d) whether it floats
36. 36.True or false: a balloon is needed for the card-on-a-glass trick. (a) True (b) False
37. 37.🛟 Why should we wipe up spilled oil at once? (a) oil attracts magnets (b) spilled oil is slippery (c) oil turns into honey (d) oil makes it rain
38. 38.True or false: a magnet is needed for the balloon rocket. (a) False (b) True
39. 39.🍯 Is an ice cube denser or less dense than water? (a) less dense than water (b) denser than water
40. 40.🧺 Which of these is not needed for the dissolving test? (a) cotton wool (b) warm water (c) a teaspoon (d) two clear glasses

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