Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 849 · 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: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) the cap is sticky (c) air inside pushes back (d) water is hiding there
2. 2.🔍 Which is the odd one out? (a) a fluff of cotton (b) a paper helicopter (c) a feather (d) a steel spoon
3. 3.🛟 What should you do with wet floors after the experiment? (a) leave them wet (b) slide on them (c) pour more water (d) wipe them dry
4. 4.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same card”? (a) we keep it the same (b) we change it (c) we measure it
5. 5.True or false: food colour is needed for the coloured flower experiment. (a) False (b) True
6. 6.🔍 Which layer is on top in the honey-water-oil tower? (a) cooking oil (b) coloured water (c) honey (d) the spoon
7. 7.⚖️ 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 kept the same. (a) True (b) False
8. 8.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same straw”? (a) we measure it (b) we keep it the same (c) we change it
9. 9.⚖️ 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 shape of the clay (b) the tub of water (c) the kind of clay (d) the amount of clay
10. 10.True or false: safety scissors is needed for the paper helicopter. (a) False (b) True
11. 11.True or false: sugar stirred well dissolves faster. (a) False (b) True
12. 12.💧 Which of these is evaporation? (a) water becoming ice (b) sweat drying on skin (c) ice becoming water (d) drops on a cold glass
13. 13.True or false: small pebbles does not dissolve in water. (a) False (b) True
14. 14.🧺 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 magnet (d) a sunny window
15. 15.🔮 A cork floats in tap water. What happens in very salty water? (a) it dissolves (b) it turns white (c) it still floats (d) it sinks
16. 16.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
17. 17.🛟 Which of these sinks in water? (a) an empty capped bottle (b) a steel spoon (c) a cork (d) a dry leaf
18. 18.True or false: a cotton thread does not let water climb. (a) True (b) False
19. 19.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure
20. 20.True or false: vinegar is needed for the balloon rocket. (a) True (b) False
21. 21.🥄 Why does sugar dissolve faster in warm water? (a) cold water is wet (b) particles move faster (c) warm water is thicker (d) sugar likes the dark
22. 22.🚀 In “push back, move forward”, which way does the balloon go? (a) goes forward (b) goes backward
23. 23.🛟 Where is a safe place to drop the helicopter from? (a) from your raised hand (b) a roof edge (c) a wobbly chair (d) a high window ledge
24. 24.🔍 Which is the odd one out? (a) honey (b) a coin (c) a pebble (d) an ice cube
25. 25.🛟 Which of these sinks in water? (a) a metal key (b) a cork (c) an ice-cream stick (d) an empty capped bottle
26. 26.True or false: sugar does not dissolve in water. (a) False (b) True
27. 27.🛟 Which scissors should children use to cut the paper? (a) gardening shears (b) sharp kitchen shears (c) a paper cutter (d) safety scissors
28. 28.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the stirring”? (a) we change it (b) we measure it (c) we keep it the same
29. 29.💧 Why do water drops form on the outside of a glass of ice water? (a) the glass leaks (b) ice escapes the glass (c) vapour in air cools (d) the glass sweats
30. 30.🔮 Predict: a bowl of water is left uncovered in the hot sun all day. What happens? (a) it turns to salt (b) the water increases (c) some water evaporates (d) it turns to ice
31. 31.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the length of the blades is what we measure. (a) False (b) True
32. 32.⚖️ 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) how full the glass is (b) the way we turn it (c) whether the card stays (d) the same card
33. 33.True or false: a battery cell is not needed for the float-or-sink test. (a) False (b) True
34. 34.⚖️ 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 keep it the same (c) we change it
35. 35.🛟 Who should trim the flower stem? (a) a grown-up (b) a pet (c) anyone, without looking (d) a toddler
36. 36.🛟 Which of these floats on water? (a) a steel spoon (b) an empty capped bottle (c) a coin (d) a glass marble
37. 37.🥄 Does sugar in icy water dissolve faster or slower? (a) slower (b) faster
38. 38.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “time to reach the floor”? (a) we change it (b) we measure it (c) we keep it the same
39. 39.🔮 Predict: does stirring make sugar dissolve faster or slower? (a) the same (b) slower (c) not at all (d) faster
40. 40.🔮 What would change if the flower stood in plain water? (a) the petals turn red (b) no colour change (c) the flower glows (d) the stem turns blue

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