Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 451 · 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.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the water temperature is the one thing we change. (a) False (b) True
2. 2.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to hide the corks (b) to splash everyone (c) to keep children safe (d) to win a prize
3. 3.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) turmeric powder (b) a tall clear glass (c) cooking oil (d) water with food colour
4. 4.💧 Why do water drops form on the outside of a glass of ice water? (a) vapour in air cools (b) the glass leaks (c) ice escapes the glass (d) the glass sweats
5. 5.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is what we measure? (a) the room it stands in (b) the amount of water (c) the kind of flower (d) time for colour to show
6. 6.🔍 Which is the odd one out? (a) a paper helicopter (b) a stone (c) a feather (d) an open sheet of paper
7. 7.🔍 Which layer is on top in the honey-water-oil tower? (a) the spoon (b) honey (c) cooking oil (d) coloured water
8. 8.🔮 A cork floats in tap water. What happens in very salty water? (a) it still floats (b) it sinks (c) it turns white (d) it dissolves
9. 9.🚁 Which of these falls fast through the air? (a) a stone (b) a fluff of cotton (c) a feather (d) a paper helicopter
10. 10.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is the one thing we change? (a) the time we wait (b) the size of the bowl (c) sun or shade (d) how many drops form
11. 11.True or false: yeast is needed for the card-on-a-glass trick. (a) True (b) False
12. 12.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is the one thing we change? (a) brightness of rainbow (b) the same white paper (c) the amount of water (d) the time of day
13. 13.📘 What does “dense” mean? (a) very thin (b) very hot (c) very colourful (d) heavy for its size
14. 14.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is kept the same? (a) distance it travels (b) the same string (c) how big we blow it
15. 15.🧺 Do we need two chairs for the balloon rocket? (a) not needed (b) needed
16. 16.🛟 Does an ice cube float or sink in water? (a) sinks (b) floats
17. 17.🧺 Which of these is needed for the dissolving test? (a) a magnet (b) cotton wool (c) a clock or timer (d) honey
18. 18.🚁 Which of these falls fast through the air? (a) an open sheet of paper (b) a fluff of cotton (c) a toy parachute (d) a crumpled paper ball
19. 19.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “distance it travels”? (a) we keep it the same (b) we measure it (c) we change it
20. 20.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) a battery cell (b) water (c) a big bowl (d) cling film
21. 21.True or false: water with food colour is not needed for the density tower. (a) True (b) False
22. 22.🔮 A flat sheet and a crumpled ball of the same paper drop together. Which lands first? (a) the crumpled ball (b) a sheet of glass (c) neither of them (d) the flat sheet
23. 23.True or false: sugar in icy water dissolves faster. (a) True (b) False
24. 24.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) sticky tape (b) a balloon (c) two chairs (d) turmeric powder
25. 25.🚁 Dropped from a raised hand, does a fluff of cotton fall slowly or fast? (a) falls fast (b) falls slowly
26. 26.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is what we measure. (a) True (b) False
27. 27.🌦️ To see a rainbow in the sky, where must the Sun be? (a) in front of you (b) straight above you (c) behind you (d) under the ground
28. 28.🚁 Which of these falls slowly through the air? (a) a glass marble (b) a crumpled paper ball (c) a steel spoon (d) a fluff of cotton
29. 29.🧺 Do we need a balloon for the balloon rocket? (a) needed (b) not needed
30. 30.🛟 Which scissors should children use to cut the paper? (a) safety scissors (b) gardening shears (c) a paper cutter (d) sharp kitchen shears
31. 31.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the time of day”? (a) we keep it the same (b) we measure it (c) we change it
32. 32.True or false: yeast is not needed for the water rainbow. (a) False (b) True
33. 33.🔍 Which is the odd one out? (a) a crumpled paper ball (b) a stone (c) a feather (d) a steel spoon
34. 34.🧺 Do we need a magnet for the water cycle bowl? (a) not needed (b) needed
35. 35.🧺 Do we need a clear glass of water for the water rainbow? (a) needed (b) not needed
36. 36.🚁 Which of these falls fast through the air? (a) a glass marble (b) a toy parachute (c) a feather (d) a paper helicopter
37. 37.🧺 Do we need a drinking straw for the balloon rocket? (a) needed (b) not needed
38. 38.🧺 Do we need a mirror for the water cycle bowl? (a) needed (b) not needed
39. 39.True or false: a compass needle works by air pressure. (a) False (b) True
40. 40.🛟 Who should trim the flower stem? (a) anyone, without looking (b) a pet (c) a toddler (d) a grown-up

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