Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 44 · 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.True or false: a battery cell is needed for the density tower. (a) True (b) False
2. 2.🔮 What would change if the flower stood in plain water? (a) no colour change (b) the stem turns blue (c) the flower glows (d) the petals turn red
3. 3.True or false: a sunny window is not needed for the water rainbow. (a) True (b) False
4. 4.🔍 What do you see a day after a white flower stands in blue water? (a) the petals turn bluish (b) the water turns green (c) the stem turns to ice (d) the flower floats away
5. 5.True or false: a balloon is not needed for the density tower. (a) True (b) False
6. 6.True or false: a mirror is needed for the density tower. (a) False (b) True
7. 7.🧺 Which of these is needed for the density tower? (a) a magnet (b) a mirror (c) turmeric powder (d) a spoon
8. 8.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is what we measure? (a) the tub of water (b) the shape of the clay (c) whether it floats (d) the kind of clay
9. 9.⚖️ 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 “the same glass”? (a) we keep it the same (b) we change it (c) we measure it
10. 10.True or false: a steel spoon does not let water climb. (a) False (b) True
11. 11.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) False (b) True
12. 12.🔍 Which layer is on top in the honey-water-oil tower? (a) honey (b) the spoon (c) cooking oil (d) coloured water
13. 13.🛟 Why should only a grown-up handle any hot water? (a) hot water is heavy (b) it changes colour (c) hot water is magnetic (d) hot water can scald
14. 14.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is kept the same? (a) the length of the blades (b) time to reach the floor (c) the drop height
15. 15.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a mirror (b) a sunny window (c) a clear glass of water (d) bright sunlight
16. 16.🍯 Which of these is denser than water? (a) a cork (b) a ping-pong ball (c) air (d) a pebble
17. 17.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) nothing ever happens (b) colour climbs up it (c) it sinks at once (d) it turns to plastic
18. 18.⚖️ 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 time we wait (b) the amount of water (c) how many drops form (d) the cling film cover
19. 19.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “sun or shade”? (a) we measure it (b) we change it (c) we keep it the same
20. 20.True or false: yeast is not needed for the paper helicopter. (a) False (b) True
21. 21.🚁 Why do we clip a paper clip to the bottom of the helicopter? (a) to weigh down the bottom (b) to make it fall slower (c) to make it magnetic (d) to stop the spinning
22. 22.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: brightness of rainbow is kept the same. (a) False (b) True
23. 23.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the room it stands in is what we measure. (a) True (b) False
24. 24.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is what we measure? (a) how big we blow it (b) distance it travels (c) the same tape (d) the same straw
25. 25.🥄 Which of these dissolves faster? (a) a big sugar cube (b) sugar in icy water (c) sugar in warm water (d) sugar left unstirred
26. 26.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the amount of water is the one thing we change. (a) True (b) False
27. 27.💧 Which change is this: a misty bathroom mirror? (a) freezing (b) condensation (c) melting (d) evaporation
28. 28.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to hide the corks (b) to keep children safe (c) to splash everyone (d) to win a prize
29. 29.🛟 What should you do after handling food colour? (a) rub your eyes (b) lick your fingers (c) wipe them on walls (d) wash your hands
30. 30.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “distance it travels”? (a) we change it (b) we keep it the same (c) we measure it
31. 31.📘 What pulls the paper helicopter down to the floor? (a) gravity (b) the wind (c) magnetism (d) air pressure
32. 32.🧺 Do we need a mirror for the float-or-sink test? (a) not needed (b) needed
33. 33.🧺 Do we need a clock or timer for the dissolving test? (a) not needed (b) needed
34. 34.🛟 Why should you not over-blow the balloon? (a) it changes colour (b) it gets too heavy (c) it turns into a kite (d) it can pop loudly
35. 35.🧺 Do we need a mirror for the balloon rocket? (a) not needed (b) needed
36. 36.🧺 Which of these is not needed for the float-or-sink test? (a) a tub of water (b) a towel for spills (c) a magnet (d) a results table
37. 37.True or false: table salt dissolves in water. (a) False (b) True
38. 38.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: distance it travels is what we measure. (a) True (b) False
39. 39.🔍 Which is the odd one out? (a) a bicycle pump (b) a fridge magnet (c) a vacuum cleaner (d) a drinking straw
40. 40.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) safety scissors (b) a ruler (c) a mirror (d) a strip of paper

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