Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 900 · 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.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
2. 2.🍯 Is an ice cube denser or less dense than water? (a) denser than water (b) less dense than water
3. 3.🧺 Do we need a white flower for the coloured flower experiment? (a) not needed (b) needed
4. 4.🛟 What should you do after handling food colour? (a) rub your eyes (b) wipe them on walls (c) wash your hands (d) lick your fingers
5. 5.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) a mirror (c) a sunny window (d) a sheet of white paper
6. 6.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the amount of clay”? (a) we measure it (b) we change it (c) we keep it the same
7. 7.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: sun or shade is the one thing we change. (a) False (b) True
8. 8.🛟 What should you do with popped balloon pieces? (a) chew them (b) give them to a baby (c) throw them away safely (d) keep them in your mouth
9. 9.🔮 A flat sheet and a crumpled ball of the same paper drop together. Which lands first? (a) a sheet of glass (b) the flat sheet (c) neither of them (d) the crumpled ball
10. 10.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) air pressure (b) magnetism
11. 11.True or false: a sheet of white paper is not needed for the water rainbow. (a) True (b) False
12. 12.🔍 Which is the odd one out? (a) a plastic ruler (b) a steel spoon (c) a paper towel (d) a glass marble
13. 13.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) bright sunlight (c) a sheet of white paper (d) a balloon
14. 14.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) the rainbow fades (b) it turns all red (c) it floats away (d) it turns brighter
15. 15.🥄 Which of these dissolves faster? (a) sugar in icy water (b) a big sugar cube (c) sugar stirred well (d) sugar left unstirred
16. 16.True or false: a mirror is not needed for the water cycle bowl. (a) True (b) False
17. 17.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the paper clip”? (a) we measure it (b) we change it (c) we keep it the same
18. 18.True or false: a coin is less dense than water. (a) True (b) False
19. 19.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a magnet (b) a small rainbow (c) snow falling (d) a shadow of ice
20. 20.🛟 Does an ice cube float or sink in water? (a) sinks (b) floats
21. 21.🚁 Which of these falls fast through the air? (a) a toy parachute (b) a fluff of cotton (c) a feather (d) a stone
22. 22.🔍 Which is the odd one out? (a) a drinking straw (b) a fridge magnet (c) a compass needle (d) a magnetic pin holder
23. 23.🚀 In “push back, move forward”, which way does the balloon go? (a) goes forward (b) goes backward
24. 24.🛟 Which of these floats on water? (a) an empty capped bottle (b) a coin (c) a metal key (d) a ball of clay
25. 25.🥄 Does powdered sugar dissolve faster or slower? (a) slower (b) faster
26. 26.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a balloon (b) a results table (c) small test objects (d) a tub of water
27. 27.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: whether the card stays is the one thing we change. (a) False (b) True
28. 28.🧺 Do we need a pencil for the paper helicopter? (a) not needed (b) needed
29. 29.📘 What does “dense” mean? (a) very hot (b) heavy for its size (c) very thin (d) very colourful
30. 30.🥄 Which of these dissolves faster? (a) sugar left unstirred (b) a big sugar cube (c) powdered sugar (d) sugar in icy water
31. 31.🔮 Predict: the string slopes uphill. What happens? (a) it travels less far (b) it goes backward first (c) it travels farther (d) it speeds up
32. 32.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is kept the same? (a) brightness of rainbow (b) the amount of water (c) the same glass
33. 33.🧺 Do we need a battery cell for the float-or-sink test? (a) not needed (b) needed
34. 34.🛟 Who should pour the warm water in the dissolving test? (a) the youngest child (b) a friend who is running (c) nobody needs to (d) a grown-up
35. 35.🧺 Do we need a battery cell for the water rainbow? (a) needed (b) not needed
36. 36.🧺 Do we need yeast for the balloon rocket? (a) needed (b) not needed
37. 37.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a stiff postcard (c) turmeric powder (d) a sink or a bucket
38. 38.True or false: a bicycle pump works by air pressure. (a) True (b) False
39. 39.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a few hours of waiting (b) a white flower (c) food colour (d) a magnet
40. 40.🔍 Which is the odd one out? (a) table salt (b) glucose powder (c) sand (d) sugar

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