Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 822 · 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 of these is evaporation? (a) butter going runny (b) snow turning to water (c) drops on a cold glass (d) sweat drying on skin
2. 2.True or false: sugar stirred well dissolves slower. (a) True (b) False
3. 3.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same glass is kept the same. (a) False (b) True
4. 4.🧺 Do we need a battery cell for the water rainbow? (a) not needed (b) needed
5. 5.🧺 Do we need food colour for the coloured flower experiment? (a) needed (b) not needed
6. 6.🔮 A ball of clay sinks. What happens if you press it into a thin boat shape? (a) it can float (b) it sinks faster (c) it dissolves (d) it turns to stone
7. 7.True or false: butter going runny is melting. (a) True (b) False
8. 8.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: how much of each liquid is kept the same. (a) True (b) False
9. 9.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) cold water (b) a clock or timer (c) cotton wool (d) sugar
10. 10.🥄 Which of these dissolves in water? (a) chalk powder (b) sawdust (c) table salt (d) cooking oil
11. 11.🎈 What is the job of the straw on the string? (a) it holds water (b) it makes it heavier (c) it blows air in (d) it guides the balloon
12. 12.💧 Which of these lets water climb up it? (a) a glass marble (b) a steel spoon (c) a rubber eraser (d) a strip of cloth
13. 13.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a tall clear glass (b) a mirror (c) cooking oil (d) water with food colour
14. 14.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: how many drops form is kept the same. (a) True (b) False
15. 15.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the length of the blades”? (a) we change it (b) we keep it the same (c) we measure it
16. 16.🧺 Do we need warm water for the dissolving test? (a) not needed (b) needed
17. 17.💧 Dip a paper towel into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
18. 18.⚖️ 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) whether the card stays (b) the way we turn it (c) the same glass (d) how full the glass is
19. 19.🔮 Predict: the string slopes uphill. What happens? (a) it speeds up (b) it travels farther (c) it travels less far (d) it goes backward first
20. 20.True or false: a towel is needed for the card-on-a-glass trick. (a) False (b) True
21. 21.⚖️ 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) False (b) True
22. 22.💧 Why do water drops form on the outside of a glass of ice water? (a) ice escapes the glass (b) the glass sweats (c) vapour in air cools (d) the glass leaks
23. 23.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is what we measure? (a) the time we wait (b) how many drops form (c) the cling film cover (d) the size of the bowl
24. 24.True or false: honey is less dense than water. (a) True (b) False
25. 25.⚖️ 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) sun or shade (b) the cling film cover (c) the size of the bowl (d) the amount of water
26. 26.🛟 Why should you not over-blow the balloon? (a) it gets too heavy (b) it changes colour (c) it turns into a kite (d) it can pop loudly
27. 27.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is kept the same? (a) the amount of water (b) the same white paper (c) brightness of rainbow
28. 28.🔍 Which is the odd one out? (a) a compass needle (b) a vacuum cleaner (c) a bicycle pump (d) a drinking straw
29. 29.🍯 Is air denser or less dense than water? (a) denser than water (b) less dense than water
30. 30.📘 Every push has an equal push in the opposite direction. Which toy shows this? (a) a balloon rocket (b) a fridge magnet (c) a sundial (d) a mirror
31. 31.🔍 Which is the odd one out? (a) sawdust (b) sand (c) chalk powder (d) sugar
32. 32.🚢 Why can a heavy steel ship float on the sea? (a) it has a magnet (b) steel is very light (c) its hollow shape (d) sea water is warm
33. 33.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “how big we blow it”? (a) we keep it the same (b) we change it (c) we measure it
34. 34.True or false: a magnet is not needed for the density tower. (a) False (b) True
35. 35.📘 What is it called when water climbs up thin tubes or paper by itself? (a) magnetism (b) capillary action (c) melting (d) evaporation
36. 36.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is kept the same? (a) the amount of water (b) the same glass (c) brightness of rainbow
37. 37.True or false: sand does not dissolve in water. (a) True (b) False
38. 38.🔍 Which is the odd one out? (a) water becoming ice (b) a pond icing over (c) dew on morning grass (d) making ice lollies
39. 39.💧 Dip a glass marble into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
40. 40.True or false: yeast is needed for the float-or-sink test. (a) False (b) True

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