Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 445 · 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.🧺 Do we need turmeric powder for the float-or-sink test? (a) not needed (b) needed
2. 2.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) blue (b) green (c) red (d) violet
3. 3.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: how full the glass is is the one thing we change. (a) False (b) True
4. 4.True or false: sand does not dissolve in water. (a) True (b) False
5. 5.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a mirror (b) a stiff postcard (c) a sink or a bucket (d) a glass of water
6. 6.🔮 Predict: you put ice cubes on top of the cling film. What happens? (a) the water turns red (b) more drops form (c) the bowl freezes (d) fewer drops form
7. 7.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the card stays on (c) the card flies away (d) the water turns to ice
8. 8.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is what we measure? (a) the room it stands in (b) time for colour to show (c) the kind of flower (d) the length of the stem
9. 9.🔍 Which layer is on top in the honey-water-oil tower? (a) cooking oil (b) the spoon (c) coloured water (d) honey
10. 10.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a mirror (b) small test objects (c) a towel for spills (d) a results table
11. 11.🔍 Which is the odd one out? (a) sand (b) small pebbles (c) cooking oil (d) table salt
12. 12.True or false: a mirror is needed for the dissolving test. (a) True (b) False
13. 13.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is kept the same? (a) whether the card stays (b) the way we turn it (c) how full the glass is
14. 14.🧺 Which of these is not needed for the paper helicopter? (a) a pencil (b) a paper clip (c) a strip of paper (d) turmeric powder
15. 15.🥛 Which of these works by air pressure? (a) a compass needle (b) a medicine dropper (c) a magnetic chess set (d) a magnetic pin holder
16. 16.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “how full the glass is”? (a) we measure it (b) we change it (c) we keep it the same
17. 17.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) water with food colour (b) honey (c) a tall clear glass (d) turmeric powder
18. 18.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same window”? (a) we measure it (b) we change it (c) we keep it the same
19. 19.🔮 Predict: a stem is split in two, one half in red water and one in blue. What do the petals do? (a) they stay white (b) they all turn green (c) they turn two colours (d) they fall off at once
20. 20.🛟 Why should the glass of water stand on a steady, flat place? (a) so it turns blue (b) so it gets hot (c) so it does not fall (d) so the Sun moves
21. 21.🔮 Predict: you blow the balloon up only a little. What happens? (a) it flies off the string (b) it goes much farther (c) it goes less far (d) it turns into a kite
22. 22.🛟 What should you do with popped balloon pieces? (a) keep them in your mouth (b) chew them (c) throw them away safely (d) give them to a baby
23. 23.🔍 Which is the odd one out? (a) very salty water (b) air (c) a glass marble (d) honey
24. 24.🛟 Which scissors should children use to cut the paper? (a) gardening shears (b) safety scissors (c) sharp kitchen shears (d) a paper cutter
25. 25.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is kept the same? (a) how big we blow it (b) distance it travels (c) the same string
26. 26.True or false: a magnet is needed for the float-or-sink test. (a) True (b) False
27. 27.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a balloon (b) bright sunlight (c) a clear glass of water (d) a sunny window
28. 28.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is the one thing we change? (a) the amount of clay (b) the shape of the clay (c) the kind of clay (d) the tub of water
29. 29.True or false: a mirror is needed for the float-or-sink test. (a) False (b) True
30. 30.🍯 Which of these is less dense than water? (a) honey (b) very salty water (c) an ice cube (d) a pebble
31. 31.🌦️ To see a rainbow in the sky, where must the Sun be? (a) under the ground (b) behind you (c) in front of you (d) straight above you
32. 32.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
33. 33.🔍 Which is the odd one out? (a) a steel spoon (b) a pebble (c) an iron nail (d) a dry leaf
34. 34.⚖️ 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 glass is what we measure. (a) True (b) False
35. 35.🧺 Which of these is not needed for the float-or-sink test? (a) small test objects (b) yeast (c) a results table (d) a towel for spills
36. 36.🧺 Do we need a small cup for the water cycle bowl? (a) not needed (b) needed
37. 37.🧺 Which of these is not needed for the paper helicopter? (a) a pencil (b) a magnet (c) a paper clip (d) safety scissors
38. 38.True or false: yeast is needed for the density tower. (a) False (b) True
39. 39.🛟 Does a cork float or sink in water? (a) sinks (b) floats
40. 40.🔍 Which is the odd one out? (a) a puddle drying up (b) butter going runny (c) ice becoming water (d) snow turning to water

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