Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 852 · 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 denser than water? (a) air (b) a cork (c) a glass marble (d) a ping-pong ball
2. 2.🔍 Which is the odd one out? (a) sawdust (b) chalk powder (c) cooking oil (d) food colour
3. 3.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the way we turn it”? (a) we change it (b) we keep it the same (c) we measure it
4. 4.True or false: a coin falls slowly through the air. (a) True (b) False
5. 5.🛟 Who should trim the flower stem? (a) anyone, without looking (b) a pet (c) a toddler (d) a grown-up
6. 6.⚖️ 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) how big we blow it (d) the same straw
7. 7.🧺 Which of these is not needed for the float-or-sink test? (a) a towel for spills (b) a tub of water (c) small test objects (d) a balloon
8. 8.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “time for colour to show”? (a) we measure it (b) we keep it the same (c) we change it
9. 9.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a drinking straw (c) a compass needle (d) a suction hook
10. 10.True or false: a plastic ruler does not let water climb. (a) True (b) False
11. 11.🔮 A cork floats in tap water. What happens in very salty water? (a) it dissolves (b) it turns white (c) it sinks (d) it still floats
12. 12.🧺 Which of these is not needed for the dissolving test? (a) warm water (b) two clear glasses (c) a balloon (d) cold water
13. 13.🛟 Which is the safe way to do the float-or-sink test? (a) play near a deep pond (b) leave water on the floor (c) run around the tub (d) wipe up spills at once
14. 14.🌼 Why do the petals keep pulling water up the stem? (a) petals are magnetic (b) petals like colour (c) the stem is hot (d) petals lose water to air
15. 15.True or false: food colour is not needed for the coloured flower experiment. (a) True (b) False
16. 16.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? What do we do with “how much of each liquid”? (a) we change it (b) we keep it the same (c) we measure it
17. 17.🥄 Which of these dissolves in water? (a) chalk powder (b) sugar (c) small pebbles (d) cooking oil
18. 18.🔍 Which is the odd one out? (a) a medicine dropper (b) a magnetic chess set (c) a suction hook (d) a vacuum cleaner
19. 19.🔍 Which is the odd one out? (a) dew on morning grass (b) drops on a cold glass (c) a misty bathroom mirror (d) wet clothes drying
20. 20.True or false: small test objects is not needed for the float-or-sink test. (a) True (b) False
21. 21.🥄 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
22. 22.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to win a prize (b) to keep children safe (c) to splash everyone (d) to hide the corks
23. 23.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) small test objects (b) a magnet (c) a tub of water (d) a towel for spills
24. 24.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: how much of each liquid is the one thing we change. (a) False (b) True
25. 25.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is the one thing we change? (a) the kind of flower (b) the length of the stem (c) time for colour to show (d) the room it stands in
26. 26.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
27. 27.🔍 Which is the odd one out? (a) an empty capped bottle (b) a coin (c) an ice cube (d) a cork
28. 28.True or false: a mirror is needed for the water rainbow. (a) False (b) True
29. 29.🛟 How should you check if the sugar has dissolved? (a) poke it with a finger (b) taste it (c) smell it closely (d) look for leftover grains
30. 30.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) a sunny window (c) a balloon (d) a sheet of white paper
31. 31.🧺 Which of these is needed for the water rainbow? (a) yeast (b) a balloon (c) a mirror (d) a clear glass of water
32. 32.⚖️ 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 amount of water (b) the amount of colour (c) the room it stands in (d) time for colour to show
33. 33.🛟 Which of these floats on water? (a) a steel spoon (b) a metal key (c) a feather (d) a ball of clay
34. 34.🧺 Do we need turmeric powder for the paper helicopter? (a) not needed (b) needed
35. 35.💧 Dip a rubber eraser into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
36. 36.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is what we measure? (a) the length of the blades (b) the drop height (c) time to reach the floor (d) the kind of paper
37. 37.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the amount of colour is kept the same. (a) True (b) False
38. 38.🔍 Sugar is stirred into water and seems to disappear. Where did it go? (a) it vanished for ever (b) it sank as sand (c) it became air (d) it spread in the water
39. 39.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a balloon (c) a sink or a bucket (d) turmeric powder
40. 40.🧺 Do we need yeast for the density tower? (a) needed (b) not needed

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