Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 584 · 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.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns brighter (b) it turns all red (c) it floats away (d) the rainbow fades
2. 2.True or false: sugar in icy water dissolves slower. (a) False (b) True
3. 3.🧺 Which of these is not needed for the water rainbow? (a) a sunny window (b) bright sunlight (c) a sheet of white paper (d) a balloon
4. 4.🛟 Which of these sinks in water? (a) an ice-cream stick (b) a feather (c) an empty capped bottle (d) a glass marble
5. 5.True or false: a tub of water is not needed for the float-or-sink test. (a) True (b) False
6. 6.🧺 Which of these is needed for the card-on-a-glass trick? (a) a glass of water (b) a balloon (c) a magnet (d) a mirror
7. 7.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) a magnet (b) sunlight (c) a big bowl (d) water
8. 8.🧺 Do we need turmeric powder for the density tower? (a) needed (b) not needed
9. 9.🚀 In “push back, move forward”, which way does the swimmer go? (a) goes forward (b) goes backward
10. 10.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
11. 11.🥄 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
12. 12.🚀 Which of these goes forward? (a) water a swimmer pushes (b) water from the oars (c) the balloon (d) air from the balloon
13. 13.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) two clear glasses (b) a mirror (c) cold water (d) a teaspoon
14. 14.🧺 Do we need a magnet for the balloon rocket? (a) needed (b) not needed
15. 15.🔮 Predict: you use a rough, thick string instead of a smooth one. (a) less friction (b) more friction, less far (c) no change at all (d) it goes faster
16. 16.🔍 What do you see a day after a white flower stands in blue water? (a) the water turns green (b) the petals turn bluish (c) the stem turns to ice (d) the flower floats away
17. 17.🧺 Do we need honey for the dissolving test? (a) not needed (b) needed
18. 18.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is the one thing we change? (a) the time of day (b) the same white paper (c) the amount of water (d) brightness of rainbow
19. 19.🛟 Which scissors should children use to cut the paper? (a) gardening shears (b) sharp kitchen shears (c) safety scissors (d) a paper cutter
20. 20.🔮 Predict: which dissolves faster — a sugar cube or the same amount of powdered sugar? (a) the sugar cube (b) both the same (c) neither of them (d) powdered sugar
21. 21.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) the bottle is magnetic (c) the cap is sticky (d) air inside pushes back
22. 22.⚖️ 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 length of the stem (b) the amount of colour (c) time for colour to show (d) the kind of flower
23. 23.🧺 Which of these is not needed for the coloured flower experiment? (a) a few hours of waiting (b) a white flower (c) a glass of water (d) a magnet
24. 24.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) small test objects (b) a mirror (c) a results table (d) a tub of water
25. 25.🧺 Do we need a mirror for the coloured flower experiment? (a) not needed (b) needed
26. 26.🧺 Do we need a results table for the float-or-sink test? (a) not needed (b) needed
27. 27.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to splash everyone (b) to hide the corks (c) to win a prize (d) to keep children safe
28. 28.🔮 Predict: you put ice cubes on top of the cling film. What happens? (a) the bowl freezes (b) the water turns red (c) more drops form (d) fewer drops form
29. 29.💧 Dip a piece of foil into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
30. 30.True or false: a feather floats on water. (a) True (b) False
31. 31.🧺 Do we need a clear glass of water for the water rainbow? (a) needed (b) not needed
32. 32.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
33. 33.True or false: a cork is less dense than water. (a) True (b) False
34. 34.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a stiff postcard (c) a balloon (d) a mirror
35. 35.🛟 Why should the glass of water stand on a steady, flat place? (a) so it does not fall (b) so the Sun moves (c) so it gets hot (d) so it turns blue
36. 36.💧 Which of these is melting? (a) a pond icing over (b) butter going runny (c) wet clothes drying (d) making ice lollies
37. 37.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same string”? (a) we change it (b) we measure it (c) we keep it the same
38. 38.🥛 Which of these works by magnetism? (a) a magnetic pin holder (b) a medicine dropper (c) a suction hook (d) a vacuum cleaner
39. 39.🛟 Why should only a grown-up handle any hot water? (a) hot water can scald (b) hot water is heavy (c) it changes colour (d) hot water is magnetic
40. 40.🧺 Which of these is needed for the coloured flower experiment? (a) a balloon (b) a few hours of waiting (c) a battery cell (d) a mirror

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