Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 208 · 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.☀️ What is white sunlight really made of? (a) tiny bits of dust (b) many colours mixed (c) tiny drops of water (d) only yellow light
2. 2.🎈 Why does the balloon rocket move along the string? (a) escaping air pushes it (b) a magnet pulls it (c) the straw is heavy (d) the string pulls it
3. 3.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns all red (b) the rainbow fades (c) it turns brighter (d) it floats away
4. 4.🔍 Which is the odd one out? (a) a cotton thread (b) a piece of chalk (c) a strip of cloth (d) a plastic ruler
5. 5.🔮 Predict: you shake oil and water hard in a closed bottle and wait. What happens? (a) they turn to honey (b) they become solid (c) they separate again (d) they mix for ever
6. 6.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a sink or a bucket (c) a stiff postcard (d) a mirror
7. 7.🛟 Where is a safe place to drop the helicopter from? (a) a wobbly chair (b) from your raised hand (c) a roof edge (d) a high window ledge
8. 8.True or false: a ping-pong ball is less dense than water. (a) True (b) False
9. 9.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the amount of water is what we measure. (a) True (b) False
10. 10.🛟 Does an ice cube float or sink in water? (a) sinks (b) floats
11. 11.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) True (b) False
12. 12.🧺 Which of these is needed for the paper helicopter? (a) yeast (b) a balloon (c) a battery cell (d) a pencil
13. 13.💧 Which of these is melting? (a) snow turning to water (b) wet hair drying (c) wet clothes drying (d) dew on morning grass
14. 14.True or false: a battery cell is needed for the paper helicopter. (a) False (b) True
15. 15.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) yeast (c) a glass of water (d) a balloon
16. 16.True or false: wet clothes drying is evaporation. (a) True (b) False
17. 17.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “time for colour to show”? (a) we change it (b) we keep it the same (c) we measure it
18. 18.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the way we turn it”? (a) we change it (b) we measure it (c) we keep it the same
19. 19.🛟 Why should the glass of water stand on a steady, flat place? (a) so it gets hot (b) so it does not fall (c) so it turns blue (d) so the Sun moves
20. 20.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same tape”? (a) we measure it (b) we change it (c) we keep it the same
21. 21.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same string is what we measure. (a) False (b) True
22. 22.🔮 Predict: which dissolves faster — a sugar cube or the same amount of powdered sugar? (a) neither of them (b) powdered sugar (c) both the same (d) the sugar cube
23. 23.True or false: a drinking straw works by magnetism. (a) True (b) False
24. 24.🚁 Which of these falls slowly through the air? (a) a stone (b) an open sheet of paper (c) a steel spoon (d) a coin
25. 25.🛟 Why should we wipe up spilled oil at once? (a) oil makes it rain (b) oil attracts magnets (c) oil turns into honey (d) spilled oil is slippery
26. 26.True or false: sticky tape is needed for the balloon rocket. (a) True (b) False
27. 27.True or false: a pebble is denser than water. (a) False (b) True
28. 28.🔍 Sugar is stirred into water and seems to disappear. Where did it go? (a) it spread in the water (b) it became air (c) it sank as sand (d) it vanished for ever
29. 29.⚖️ 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 keep it the same (b) we change it (c) we measure it
30. 30.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is kept the same? (a) brightness of rainbow (b) the same white paper (c) the amount of water
31. 31.🚢 Why can a heavy steel ship float on the sea? (a) sea water is warm (b) it has a magnet (c) its hollow shape (d) steel is very light
32. 32.🥄 Which of these dissolves faster? (a) sugar in warm water (b) sugar in icy water (c) a big sugar cube (d) sugar left unstirred
33. 33.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a white flower (b) a glass of water (c) a few hours of waiting (d) turmeric powder
34. 34.⚖️ 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) the same card (b) the way we turn it (c) whether the card stays (d) how full the glass is
35. 35.🧺 Which of these is needed for the balloon rocket? (a) turmeric powder (b) a mirror (c) a magnet (d) a long string
36. 36.🧺 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) yeast (d) food colour
37. 37.True or false: a battery cell is needed for the water rainbow. (a) False (b) True
38. 38.True or false: turmeric powder is needed for the water rainbow. (a) True (b) False
39. 39.⚖️ 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 same glass”? (a) we keep it the same (b) we measure it (c) we change it
40. 40.🔍 What do you see a day after a white flower stands in blue water? (a) the flower floats away (b) the petals turn bluish (c) the stem turns to ice (d) the water turns green

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