Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 641 · 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.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a glass of water (b) food colour (c) a white flower (d) turmeric powder
2. 2.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a balloon (b) a long string (c) a drinking straw (d) turmeric powder
3. 3.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is what we measure? (a) the same straw (b) how big we blow it (c) distance it travels (d) the slope of the string
4. 4.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: the order of the layers is kept the same. (a) True (b) False
5. 5.🔮 Predict: you keep adding sugar to a small glass of water and stirring. What happens in the end? (a) all of it dissolves (b) some stays undissolved (c) the water turns solid (d) the sugar turns to salt
6. 6.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is kept the same? (a) time to dissolve (b) the amount of sugar (c) the water temperature
7. 7.💧 Which of these lets water climb up it? (a) a piece of foil (b) a rubber eraser (c) a flower stem (d) a plastic ruler
8. 8.🛟 What should you do after handling food colour? (a) rub your eyes (b) wash your hands (c) wipe them on walls (d) lick your fingers
9. 9.🛟 Which is the safe way to do the float-or-sink test? (a) wipe up spills at once (b) run around the tub (c) play near a deep pond (d) leave water on the floor
10. 10.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
11. 11.True or false: cling film is needed for the water cycle bowl. (a) False (b) True
12. 12.🔮 Predict: a stem is split in two, one half in red water and one in blue. What do the petals do? (a) they turn two colours (b) they fall off at once (c) they all turn green (d) they stay white
13. 13.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
14. 14.🧺 Which of these is not needed for the balloon rocket? (a) two chairs (b) a drinking straw (c) a magnet (d) a long string
15. 15.🧺 Do we need warm water for the dissolving test? (a) not needed (b) needed
16. 16.📘 What do we call light bending as it passes from air into water? (a) evaporation (b) reflection (c) magnetism (d) refraction
17. 17.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the drop height is what we measure. (a) False (b) True
18. 18.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the kind of paper”? (a) we change it (b) we keep it the same (c) we measure it
19. 19.💧 Which of these does not let water climb? (a) a piece of chalk (b) a strip of cloth (c) a flower stem (d) a glass marble
20. 20.True or false: a balloon is needed for the dissolving test. (a) True (b) False
21. 21.🔮 A ball of clay sinks. What happens if you press it into a thin boat shape? (a) it turns to stone (b) it sinks faster (c) it dissolves (d) it can float
22. 22.🔍 How can you get the salt back from salty water? (a) stir it more (b) let the water evaporate (c) keep it in a fridge (d) add more water
23. 23.🧺 Do we need turmeric powder for the coloured flower experiment? (a) not needed (b) needed
24. 24.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is kept the same? (a) the order of the layers (b) the order of pouring (c) the same glass
25. 25.🛟 Which rule keeps you safe when working with sunlight? (a) look at it in a mirror (b) never look at the Sun (c) look at it through glass (d) stare at the Sun
26. 26.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is kept the same? (a) the tub of water (b) whether it floats (c) the shape of the clay
27. 27.🍯 Which of these is less dense than water? (a) a coin (b) air (c) a glass marble (d) very salty water
28. 28.True or false: a metal key sinks in water. (a) False (b) True
29. 29.⚖️ 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
30. 30.True or false: vinegar is not needed for the balloon rocket. (a) False (b) True
31. 31.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the shape of the clay is the one thing we change. (a) True (b) False
32. 32.🔍 Which is the odd one out? (a) a strip of cloth (b) a piece of foil (c) a cotton thread (d) a paper towel
33. 33.True or false: a flower stem lets water climb up it. (a) True (b) False
34. 34.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) a teaspoon (b) a balloon (c) sugar (d) two clear glasses
35. 35.🛟 What should you do with popped balloon pieces? (a) throw them away safely (b) give them to a baby (c) keep them in your mouth (d) chew them
36. 36.🔍 Which is the odd one out? (a) a steel spoon (b) a strip of cloth (c) a rubber eraser (d) a piece of foil
37. 37.True or false: turmeric powder is needed for the paper helicopter. (a) False (b) True
38. 38.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “distance it travels”? (a) we measure it (b) we keep it the same (c) we change it
39. 39.🌦️ To see a rainbow in the sky, where must the Sun be? (a) in front of you (b) behind you (c) under the ground (d) straight above you
40. 40.🧺 Do we need a mirror for the float-or-sink test? (a) not needed (b) needed

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