Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 172 · 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 big bowl is needed for the water cycle bowl. (a) False (b) True
2. 2.🧺 Which of these is needed for the float-or-sink test? (a) a tub of water (b) a mirror (c) a balloon (d) a magnet
3. 3.True or false: a pond icing over is condensation. (a) False (b) True
4. 4.🧺 Which of these is not needed for the coloured flower experiment? (a) food colour (b) a balloon (c) a few hours of waiting (d) a white flower
5. 5.🧺 Do we need small test objects for the float-or-sink test? (a) not needed (b) needed
6. 6.🍯 Which of these is denser than water? (a) cooking oil (b) a pebble (c) an ice cube (d) a cork
7. 7.🧺 Which of these is needed for the water rainbow? (a) turmeric powder (b) a battery cell (c) bright sunlight (d) a balloon
8. 8.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a glass of water (c) a magnet (d) a sink or a bucket
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 “how much of each liquid”? (a) we measure it (b) we keep it the same (c) we change it
10. 10.🔮 Predict: does stirring make sugar dissolve faster or slower? (a) slower (b) not at all (c) faster (d) the same
11. 11.🔍 Which is the odd one out? (a) a fridge magnet (b) a suction hook (c) a vacuum cleaner (d) a bicycle pump
12. 12.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
13. 13.🧺 Do we need a magnet for the float-or-sink test? (a) not needed (b) needed
14. 14.🧺 Do we need a big bowl for the water cycle bowl? (a) not needed (b) needed
15. 15.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is kept the same? (a) whether it floats (b) the shape of the clay (c) the amount of clay
16. 16.🛟 Which of these floats on water? (a) a ping-pong ball (b) a ball of clay (c) a pebble (d) a steel spoon
17. 17.🧺 Which of these is not needed for the coloured flower experiment? (a) a white flower (b) yeast (c) a glass of water (d) a few hours of waiting
18. 18.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
19. 19.🧺 Do we need a balloon for the paper helicopter? (a) not needed (b) needed
20. 20.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same straw”? (a) we keep it the same (b) we change it (c) we measure it
21. 21.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a battery cell (b) a clear glass of water (c) a sunny window (d) bright sunlight
22. 22.True or false: sugar in warm water dissolves faster. (a) False (b) True
23. 23.🧺 Which of these is needed for the water rainbow? (a) turmeric powder (b) a sunny window (c) yeast (d) a magnet
24. 24.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the paper clip”? (a) we change it (b) we measure it (c) we keep it the same
25. 25.🔮 Why do we try the card trick over a sink or a bucket? (a) to catch any spills (b) to make it rain (c) to grow plants (d) to cool the glass
26. 26.True or false: sweat drying on skin is evaporation. (a) True (b) False
27. 27.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is kept the same? (a) how full the glass is (b) the same card (c) whether the card stays
28. 28.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to keep children safe (b) to win a prize (c) to splash everyone (d) to hide the corks
29. 29.True or false: a mirror is needed for the balloon rocket. (a) False (b) True
30. 30.True or false: water a swimmer pushes goes backward. (a) True (b) False
31. 31.True or false: a ping-pong ball is less dense than water. (a) False (b) True
32. 32.🔮 Predict: a bowl of water is left uncovered in the hot sun all day. What happens? (a) it turns to ice (b) the water increases (c) some water evaporates (d) it turns to salt
33. 33.🛟 Which rule keeps you safe when working with sunlight? (a) never look at the Sun (b) stare at the Sun (c) look at it through glass (d) look at it in a mirror
34. 34.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: time to dissolve is what we measure. (a) False (b) True
35. 35.💧 Which of these does not let water climb? (a) a strip of cloth (b) a cotton thread (c) a paper towel (d) a rubber eraser
36. 36.🧺 Do we need turmeric powder for the coloured flower experiment? (a) needed (b) not needed
37. 37.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) True (b) False
38. 38.📘 Air presses on everything around us. What is this push called? (a) friction (b) magnetism (c) sunlight (d) air pressure
39. 39.True or false: a metal key sinks in water. (a) True (b) False
40. 40.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is hotter (c) it is magnetic (d) it will not break

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