Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 191 · 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 not needed for the paper helicopter? (a) a strip of paper (b) a ruler (c) safety scissors (d) a battery cell
2. 2.🧺 Do we need a balloon for the float-or-sink test? (a) needed (b) not needed
3. 3.True or false: a bicycle pump works by air pressure. (a) False (b) True
4. 4.📘 What do we call light bending as it passes from air into water? (a) refraction (b) evaporation (c) magnetism (d) reflection
5. 5.🛟 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 does not fall (d) so it gets hot
6. 6.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a towel (c) a magnet (d) a sink or a bucket
7. 7.🥄 Which of these dissolves faster? (a) powdered sugar (b) sugar left unstirred (c) a big sugar cube (d) sugar in icy water
8. 8.True or false: sawdust dissolves in water. (a) True (b) False
9. 9.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is the one thing we change? (a) the person dropping (b) time to reach the floor (c) the kind of paper (d) the length of the blades
10. 10.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the amount of clay is kept the same. (a) True (b) False
11. 11.True or false: a battery cell is not needed for the density tower. (a) False (b) True
12. 12.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) a magnet (b) two clear glasses (c) a clock or timer (d) cold water
13. 13.🛟 Which rule keeps you safe when working with sunlight? (a) look at it through glass (b) look at it in a mirror (c) never look at the Sun (d) stare at the Sun
14. 14.🔮 Predict: a bowl of water is left uncovered in the hot sun all day. What happens? (a) it turns to salt (b) it turns to ice (c) some water evaporates (d) the water increases
15. 15.🧺 Do we need a battery cell for the balloon rocket? (a) needed (b) not needed
16. 16.True or false: an iron nail floats on water. (a) True (b) False
17. 17.🧺 Do we need yeast for the density tower? (a) not needed (b) needed
18. 18.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
19. 19.🍯 Why does honey sink to the bottom of the glass? (a) it is yellow (b) it is the stickiest (c) it is the densest (d) it is the coldest
20. 20.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) cooking oil (b) honey (c) a mirror (d) a spoon
21. 21.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) False (b) True
22. 22.🔍 Which is the odd one out? (a) a crumpled paper ball (b) a steel spoon (c) a paper helicopter (d) a glass marble
23. 23.🛟 Which of these sinks in water? (a) an ice cube (b) a coin (c) a dry leaf (d) a piece of thermocol
24. 24.🔍 Which is the odd one out? (a) a glass marble (b) a piece of thermocol (c) a ball of clay (d) an iron nail
25. 25.🌦️ To see a rainbow in the sky, where must the Sun be? (a) under the ground (b) straight above you (c) behind you (d) in front of you
26. 26.🧺 Do we need a sunny window for the water rainbow? (a) not needed (b) needed
27. 27.🧺 Do we need cotton wool for the dissolving test? (a) needed (b) not needed
28. 28.🛟 How should you check if the sugar has dissolved? (a) look for leftover grains (b) smell it closely (c) poke it with a finger (d) taste it
29. 29.True or false: gas from the rocket goes forward. (a) True (b) False
30. 30.🧺 Which of these is needed for the water rainbow? (a) a clear glass of water (b) yeast (c) turmeric powder (d) a mirror
31. 31.🧺 Do we need vinegar for the balloon rocket? (a) not needed (b) needed
32. 32.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same tape”? (a) we keep it the same (b) we change it (c) we measure it
33. 33.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a long string (b) two chairs (c) a mirror (d) a drinking straw
34. 34.True or false: a balloon is needed for the coloured flower experiment. (a) True (b) False
35. 35.🧺 Do we need a battery cell for the water cycle bowl? (a) needed (b) not needed
36. 36.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is what we measure? (a) the slope of the string (b) distance it travels (c) the same string (d) how big we blow it
37. 37.💧 Why do water drops form on the outside of a glass of ice water? (a) the glass leaks (b) ice escapes the glass (c) the glass sweats (d) vapour in air cools
38. 38.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the slope of the string”? (a) we keep it the same (b) we change it (c) we measure it
39. 39.🥄 Does powdered sugar dissolve faster or slower? (a) slower (b) faster
40. 40.True or false: an ice cube sinks in water. (a) False (b) True

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