Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 987 · 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 should you do with wet floors after the experiment? (a) pour more water (b) wipe them dry (c) slide on them (d) leave them wet
2. 2.🛟 Which of these floats on water? (a) a glass marble (b) a metal key (c) a cork (d) a coin
3. 3.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the length of the stem is the one thing we change. (a) True (b) False
4. 4.🌊 What pushes a floating cork upward? (a) the cork itself (b) the water (c) the tub (d) the air above
5. 5.True or false: a paper helicopter falls fast through the air. (a) True (b) False
6. 6.True or false: yeast is not needed for the card-on-a-glass trick. (a) False (b) True
7. 7.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is kept the same? (a) time to dissolve (b) the water temperature (c) the amount of sugar
8. 8.⚖️ 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 the one thing we change. (a) True (b) False
9. 9.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a balloon (c) yeast (d) a stiff postcard
10. 10.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the amount of clay is kept the same. (a) True (b) False
11. 11.🥄 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
12. 12.🔮 Predict: does stirring make sugar dissolve faster or slower? (a) slower (b) the same (c) faster (d) not at all
13. 13.🧺 Which of these is not needed for the water cycle bowl? (a) sunlight (b) a balloon (c) water (d) cling film
14. 14.True or false: sunlight is needed for the water cycle bowl. (a) False (b) True
15. 15.🧺 Which of these is not needed for the coloured flower experiment? (a) a battery cell (b) a white flower (c) food colour (d) a glass of water
16. 16.True or false: the swimmer goes forward. (a) True (b) False
17. 17.True or false: turmeric powder is needed for the water rainbow. (a) True (b) False
18. 18.🛟 Why should the glass of water stand on a steady, flat place? (a) so it does not fall (b) so it gets hot (c) so the Sun moves (d) so it turns blue
19. 19.🥄 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
20. 20.🚁 Which of these falls fast through the air? (a) a fluff of cotton (b) an open sheet of paper (c) a paper helicopter (d) a steel spoon
21. 21.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) food colour (b) a few hours of waiting (c) a battery cell (d) a glass of water
22. 22.True or false: a feather falls fast through the air. (a) True (b) False
23. 23.🥄 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
24. 24.📘 What is water vapour? (a) salty water (b) water as a gas (c) tiny ice cubes (d) a kind of smoke
25. 25.🔮 Predict: you fold the two blades the other way. What changes? (a) it does not fall (b) it falls upward (c) it turns blue (d) it spins the other way
26. 26.True or false: a small cup is needed for the water cycle bowl. (a) False (b) True
27. 27.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is the one thing we change? (a) how many drops form (b) sun or shade (c) the size of the bowl (d) the amount of water
28. 28.True or false: bright sunlight is needed for the water rainbow. (a) True (b) False
29. 29.🛟 Which of these sinks in water? (a) a feather (b) a ping-pong ball (c) an iron nail (d) a dry leaf
30. 30.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the paper clip”? (a) we keep it the same (b) we measure it (c) we change it
31. 31.True or false: a pond icing over is evaporation. (a) True (b) False
32. 32.⚖️ 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 order of pouring”? (a) we keep it the same (b) we change it (c) we measure it
33. 33.🧺 Which of these is needed for the water rainbow? (a) bright sunlight (b) a magnet (c) a mirror (d) a battery cell
34. 34.True or false: a battery cell is not needed for the water rainbow. (a) True (b) False
35. 35.True or false: a mirror is needed for the water rainbow. (a) False (b) True
36. 36.🔍 Which is the odd one out? (a) honey (b) a glass marble (c) a cork (d) very salty water
37. 37.🔍 Which is the odd one out? (a) sugar (b) glucose powder (c) cooking oil (d) table salt
38. 38.🔍 How can you get the salt back from salty water? (a) add more water (b) stir it more (c) keep it in a fridge (d) let the water evaporate
39. 39.🛟 Does a ball of clay float or sink in water? (a) sinks (b) floats
40. 40.🔮 Predict: you use a rough, thick string instead of a smooth one. (a) more friction, less far (b) it goes faster (c) no change at all (d) less friction

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