Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 121 · 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 is the odd one out? (a) a cork (b) a ping-pong ball (c) a pebble (d) cooking oil
2. 2.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same straw is what we measure. (a) True (b) False
3. 3.🚁 Dropped from a raised hand, does a stone fall slowly or fast? (a) falls fast (b) falls slowly
4. 4.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is what we measure? (a) time to dissolve (b) the stirring (c) the water temperature (d) the amount of sugar
5. 5.🛟 Where is a safe place to drop the helicopter from? (a) a roof edge (b) from your raised hand (c) a high window ledge (d) a wobbly chair
6. 6.🍯 Is air denser or less dense than water? (a) denser than water (b) less dense than water
7. 7.True or false: a balloon is needed for the card-on-a-glass trick. (a) False (b) True
8. 8.⚖️ 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 what we measure. (a) True (b) False
9. 9.🧺 Do we need a glass of water for the coloured flower experiment? (a) not needed (b) needed
10. 10.📘 Every push has an equal push in the opposite direction. Which toy shows this? (a) a sundial (b) a mirror (c) a balloon rocket (d) a fridge magnet
11. 11.🍯 Which of these is denser than water? (a) an ice cube (b) a glass marble (c) cooking oil (d) a ping-pong ball
12. 12.🧺 Which of these is not needed for the balloon rocket? (a) sticky tape (b) a long string (c) a balloon (d) a magnet
13. 13.True or false: a strip of cloth does not let water climb. (a) True (b) False
14. 14.True or false: sugar left unstirred dissolves faster. (a) True (b) False
15. 15.🛟 Why should the glass of water stand on a steady, flat place? (a) so the Sun moves (b) so it gets hot (c) so it does not fall (d) so it turns blue
16. 16.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the length of the stem is the one thing we change. (a) False (b) True
17. 17.🍯 Which of these is less dense than water? (a) honey (b) very salty water (c) a coin (d) air
18. 18.🧺 Do we need sunlight for the water cycle bowl? (a) not needed (b) needed
19. 19.🧺 Do we need cold water for the dissolving test? (a) needed (b) not needed
20. 20.True or false: safety scissors is not needed for the paper helicopter. (a) False (b) True
21. 21.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is kept the same? (a) the length of the stem (b) time for colour to show (c) the kind of flower
22. 22.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the kind of paper”? (a) we measure it (b) we keep it the same (c) we change it
23. 23.🍯 Is a glass marble denser or less dense than water? (a) less dense than water (b) denser than water
24. 24.🔮 Predict: you add two more paper clips. How does it fall? (a) slower (b) faster (c) it stops in the air (d) it floats up
25. 25.🧺 Do we need a magnet for the water cycle bowl? (a) not needed (b) needed
26. 26.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the person dropping is what we measure. (a) True (b) False
27. 27.⚖️ 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 measure it (b) we keep it the same (c) we change it
28. 28.🛟 How should you check if the sugar has dissolved? (a) look for leftover grains (b) poke it with a finger (c) taste it (d) smell it closely
29. 29.🧺 Which of these is not needed for the paper helicopter? (a) a ruler (b) safety scissors (c) a strip of paper (d) yeast
30. 30.🌈 In VIBGYOR, what number colour is red?
31. 31.True or false: sugar is needed for the dissolving test. (a) True (b) False
32. 32.🌈 How many colours do we name in a rainbow (VIBGYOR)?
33. 33.🧺 Which of these is needed for the water rainbow? (a) turmeric powder (b) a balloon (c) a battery cell (d) a clear glass of water
34. 34.True or false: a misty bathroom mirror is evaporation. (a) False (b) True
35. 35.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same glass”? (a) we change it (b) we keep it the same (c) we measure it
36. 36.🚁 Why does the paper helicopter fall slowly? (a) a magnet holds it (b) air pushes on its blades (c) it has no weight (d) the floor pushes it
37. 37.True or false: a tall clear glass is needed for the density tower. (a) True (b) False
38. 38.⚖️ 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 kept the same. (a) True (b) False
39. 39.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is the one thing we change? (a) distance it travels (b) the same string (c) the same straw (d) how big we blow it
40. 40.True or false: a medicine dropper works by air pressure. (a) False (b) True

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