Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 484 · 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.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to hide the corks (b) to win a prize (c) to keep children safe (d) to splash everyone
2. 2.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “whether the card stays”? (a) we change it (b) we measure it (c) we keep it the same
3. 3.True or false: a balloon is needed for the density tower. (a) True (b) False
4. 4.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a compass needle (c) a magnetic pin holder (d) a suction hook
5. 5.🔮 What would change if the flower stood in plain water? (a) the stem turns blue (b) the flower glows (c) the petals turn red (d) no colour change
6. 6.⚖️ 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) whether the card stays (c) the same glass (d) the same card
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 flies away (c) the water turns to ice (d) the card stays on
8. 8.🧺 Do we need yeast for the water rainbow? (a) needed (b) not needed
9. 9.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) food colour (b) a white flower (c) a glass of water (d) a magnet
10. 10.🛟 Who should pour the warm water in the dissolving test? (a) nobody needs to (b) a grown-up (c) the youngest child (d) a friend who is running
11. 11.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the kind of clay”? (a) we change it (b) we keep it the same (c) we measure it
12. 12.🧺 Do we need a battery cell for the water cycle bowl? (a) needed (b) not needed
13. 13.💧 Which change is this: a puddle drying up? (a) condensation (b) evaporation (c) freezing (d) melting
14. 14.🥛 Which of these works by magnetism? (a) a fridge magnet (b) a suction hook (c) a vacuum cleaner (d) a bicycle pump
15. 15.🧺 Which of these is needed for the balloon rocket? (a) a mirror (b) a battery cell (c) turmeric powder (d) a drinking straw
16. 16.True or false: bright sunlight is not needed for the water rainbow. (a) True (b) False
17. 17.🌈 How many colours do we name in a rainbow (VIBGYOR)?
18. 18.💧 Dip a sugar cube into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
19. 19.True or false: a long string is not needed for the balloon rocket. (a) False (b) True
20. 20.🧺 Which of these is not needed for the dissolving test? (a) sugar (b) a clock or timer (c) a balloon (d) two clear glasses
21. 21.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the water temperature is kept the same. (a) True (b) False
22. 22.⚖️ 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 keep it the same (b) we change it (c) we measure it
23. 23.🛟 What should you do after handling food colour? (a) lick your fingers (b) wash your hands (c) wipe them on walls (d) rub your eyes
24. 24.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) air inside pushes back (c) the cap is sticky (d) water is hiding there
25. 25.🧺 Which of these is needed for the dissolving test? (a) warm water (b) a magnet (c) cotton wool (d) a comb
26. 26.True or false: a mirror is needed for the card-on-a-glass trick. (a) True (b) False
27. 27.🍯 Why does honey sink to the bottom of the glass? (a) it is the coldest (b) it is the densest (c) it is the stickiest (d) it is yellow
28. 28.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same white paper is the one thing we change. (a) True (b) False
29. 29.🧺 Which of these is not needed for the paper helicopter? (a) a ruler (b) a balloon (c) a strip of paper (d) safety scissors
30. 30.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a balloon (b) a pencil (c) a strip of paper (d) a ruler
31. 31.🛟 Which scissors should children use to cut the paper? (a) sharp kitchen shears (b) safety scissors (c) a paper cutter (d) gardening shears
32. 32.🚀 Which of these goes forward? (a) air from the balloon (b) water from the oars (c) water a swimmer pushes (d) the rowing boat
33. 33.🔍 Which is the odd one out? (a) a rubber eraser (b) a glass marble (c) a sugar cube (d) a steel spoon
34. 34.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is the one thing we change? (a) how much of each liquid (b) the same three liquids (c) the same glass (d) the order of pouring
35. 35.🔍 Which is the odd one out? (a) table salt (b) glucose powder (c) cooking oil (d) baking soda
36. 36.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is what we measure? (a) the size of the bowl (b) the time we wait (c) sun or shade (d) how many drops form
37. 37.🥄 Which of these dissolves faster? (a) sugar in icy water (b) a big sugar cube (c) powdered sugar (d) sugar left unstirred
38. 38.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns all red (b) it turns brighter (c) it floats away (d) the rainbow fades
39. 39.🧺 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 sunny window (d) a magnet
40. 40.🌈 In VIBGYOR, what number colour is indigo?

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