Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 617 · 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.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) colour climbs up it (b) it turns to plastic (c) nothing ever happens (d) it sinks at once
2. 2.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a vacuum cleaner (c) a suction hook (d) a compass needle
3. 3.💧 Why do water drops form on the outside of a glass of ice water? (a) ice escapes the glass (b) the glass leaks (c) vapour in air cools (d) the glass sweats
4. 4.🚀 In “push back, move forward”, which way does the rowing boat go? (a) goes forward (b) goes backward
5. 5.🧺 Do we need cotton wool for the dissolving test? (a) needed (b) not needed
6. 6.🌈 In VIBGYOR, what number colour is violet?
7. 7.True or false: cooking oil is less dense than water. (a) True (b) False
8. 8.⚖️ 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
9. 9.🧺 Do we need a clear glass of water for the water rainbow? (a) not needed (b) needed
10. 10.🧺 Do we need a glass of water for the coloured flower experiment? (a) needed (b) not needed
11. 11.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the amount of water”? (a) we measure it (b) we change it (c) we keep it the same
12. 12.True or false: a balloon is needed for the density tower. (a) True (b) False
13. 13.💧 Which change is this: a misty bathroom mirror? (a) melting (b) evaporation (c) freezing (d) condensation
14. 14.🥄 Does sugar stirred well dissolve faster or slower? (a) slower (b) faster
15. 15.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is the one thing we change? (a) the same three liquids (b) the order of the layers (c) how much of each liquid (d) the order of pouring
16. 16.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: the same three liquids is kept the same. (a) True (b) False
17. 17.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) yeast (c) a sheet of white paper (d) bright sunlight
18. 18.⚖️ 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) whether the card stays (b) the same glass (c) how full the glass is (d) the same card
19. 19.🛟 Why should the glass of water stand on a steady, flat place? (a) so the Sun moves (b) so it turns blue (c) so it gets hot (d) so it does not fall
20. 20.🔮 Predict: you keep adding sugar to a small glass of water and stirring. What happens in the end? (a) the sugar turns to salt (b) the water turns solid (c) some stays undissolved (d) all of it dissolves
21. 21.🛟 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 win a prize (d) to keep children safe
22. 22.🧺 Do we need safety scissors for the paper helicopter? (a) not needed (b) needed
23. 23.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) sunlight (b) a magnet (c) cling film (d) water
24. 24.🛟 Who should trim the flower stem? (a) a grown-up (b) a pet (c) a toddler (d) anyone, without looking
25. 25.True or false: a glass marble floats on water. (a) True (b) False
26. 26.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is what we measure? (a) the amount of water (b) the same white paper (c) brightness of rainbow (d) the same glass
27. 27.🥄 Does a big sugar cube dissolve faster or slower? (a) faster (b) slower
28. 28.🔮 Predict: does stirring make sugar dissolve faster or slower? (a) the same (b) slower (c) faster (d) not at all
29. 29.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) a balloon (b) two clear glasses (c) cold water (d) a teaspoon
30. 30.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is kept the same? (a) sun or shade (b) how many drops form (c) the cling film cover
31. 31.⚖️ 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 pouring (b) the same three liquids (c) the order of the layers
32. 32.🧺 Do we need water with food colour for the density tower? (a) not needed (b) needed
33. 33.🔮 Predict: the string slopes uphill. What happens? (a) it speeds up (b) it goes backward first (c) it travels farther (d) it travels less far
34. 34.🥛 Why is it best to fill the glass right to the top? (a) it looks nicer (b) the card gets wet (c) water is heavier (d) little air left inside
35. 35.🛟 What should you do with popped balloon pieces? (a) keep them in your mouth (b) give them to a baby (c) throw them away safely (d) chew them
36. 36.🧺 Which of these is not needed for the float-or-sink test? (a) a tub of water (b) small test objects (c) a mirror (d) a towel for spills
37. 37.🥄 Which of these dissolves in water? (a) sand (b) table salt (c) sawdust (d) cooking oil
38. 38.True or false: sunlight is not needed for the water cycle bowl. (a) False (b) True
39. 39.🌼 How does coloured water reach the petals? (a) through tiny stem tubes (b) through the air (c) it rains on them (d) it is sprayed on
40. 40.🔍 Which is the odd one out? (a) sugar (b) baking soda (c) sand (d) table salt

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