Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 368 · 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.🫗 Why does cooking oil float on top of water? (a) oil is heavier (b) oil is less dense (c) oil is hot (d) oil is sticky
2. 2.True or false: baking soda dissolves in water. (a) False (b) True
3. 3.💧 Why do water drops form on the outside of a glass of ice water? (a) vapour in air cools (b) the glass leaks (c) the glass sweats (d) ice escapes the glass
4. 4.🚁 Dropped from a raised hand, does a feather fall slowly or fast? (a) falls fast (b) falls slowly
5. 5.🧺 Which of these is not needed for the coloured flower experiment? (a) a glass of water (b) food colour (c) a white flower (d) a battery cell
6. 6.🚁 Dropped from a raised hand, does a toy parachute fall slowly or fast? (a) falls slowly (b) falls fast
7. 7.🔍 Which is the odd one out? (a) sawdust (b) baking soda (c) table salt (d) glucose powder
8. 8.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a stiff postcard (c) a towel (d) turmeric powder
9. 9.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is the one thing we change? (a) the same glass (b) whether the card stays (c) how full the glass is (d) the way we turn it
10. 10.☀️ What is white sunlight really made of? (a) many colours mixed (b) only yellow light (c) tiny bits of dust (d) tiny drops of water
11. 11.💧 Which of these does not let water climb? (a) a cotton thread (b) a paper towel (c) a plastic ruler (d) a strip of cloth
12. 12.🌈 How many colours do we name in a rainbow (VIBGYOR)?
13. 13.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) a sheet of white paper (c) a sunny window (d) a magnet
14. 14.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a mirror (b) a ruler (c) safety scissors (d) a pencil
15. 15.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) safety scissors (b) a battery cell (c) a strip of paper (d) a pencil
16. 16.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “how big we blow it”? (a) we measure it (b) we keep it the same (c) we change it
17. 17.🧺 Which of these is needed for the density tower? (a) yeast (b) a tall clear glass (c) a balloon (d) a magnet
18. 18.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “whether it floats”? (a) we keep it the same (b) we measure it (c) we change it
19. 19.True or false: food colour is needed for the coloured flower experiment. (a) True (b) False
20. 20.🔮 Predict: you keep adding sugar to a small glass of water and stirring. What happens in the end? (a) some stays undissolved (b) all of it dissolves (c) the water turns solid (d) the sugar turns to salt
21. 21.🛟 Which rule keeps you safe when working with sunlight? (a) look at it through glass (b) never look at the Sun (c) look at it in a mirror (d) stare at the Sun
22. 22.🧺 Which of these is needed for the water cycle bowl? (a) a battery cell (b) yeast (c) a magnet (d) water
23. 23.True or false: a fridge magnet works by air pressure. (a) False (b) True
24. 24.🔍 Which layer is on top in the honey-water-oil tower? (a) cooking oil (b) the spoon (c) coloured water (d) honey
25. 25.🌈 Why does sunlight make a rainbow through a glass of water? (a) the glass is painted (b) water splits the light (c) the water is coloured (d) the paper makes colours
26. 26.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) a teaspoon (b) a clock or timer (c) a magnet (d) sugar
27. 27.🎈 Why does the balloon rocket move along the string? (a) the string pulls it (b) escaping air pushes it (c) the straw is heavy (d) a magnet pulls it
28. 28.🍯 Is a cork denser or less dense than water? (a) denser than water (b) less dense than water
29. 29.True or false: turmeric powder is not needed for the paper helicopter. (a) True (b) False
30. 30.True or false: a sunny window is needed for the water rainbow. (a) False (b) True
31. 31.🧺 Which of these is not needed for the card-on-a-glass trick? (a) turmeric powder (b) a towel (c) a stiff postcard (d) a sink or a bucket
32. 32.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) cling film (b) ice cubes (c) a battery cell (d) sunlight
33. 33.⚖️ 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 kept the same. (a) False (b) True
34. 34.🧺 Do we need cotton wool for the dissolving test? (a) needed (b) not needed
35. 35.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the cling film cover”? (a) we measure it (b) we change it (c) we keep it the same
36. 36.🧺 Which of these is needed for the density tower? (a) a battery cell (b) a balloon (c) a spoon (d) turmeric powder
37. 37.🔍 Which is the odd one out? (a) a ball of clay (b) a cork (c) a dry leaf (d) a piece of thermocol
38. 38.True or false: a steel spoon sinks in water. (a) True (b) False
39. 39.🎈 What is the job of the straw on the string? (a) it guides the balloon (b) it makes it heavier (c) it blows air in (d) it holds water
40. 40.🧺 Which of these is needed for the paper helicopter? (a) a balloon (b) a magnet (c) turmeric powder (d) a strip of paper

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