Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 85 · 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.📘 Air presses on everything around us. What is this push called? (a) magnetism (b) sunlight (c) friction (d) air pressure
2. 2.🧺 Do we need a mirror for the water cycle bowl? (a) needed (b) not needed
3. 3.🌈 In VIBGYOR, what number colour is yellow?
4. 4.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is the one thing we change? (a) the kind of sugar (b) the amount of water (c) the amount of sugar (d) the water temperature
5. 5.🧺 Do we need a clock or timer for the dissolving test? (a) not needed (b) needed
6. 6.🧺 Which of these is needed for the density tower? (a) a balloon (b) a tall clear glass (c) a magnet (d) a mirror
7. 7.True or false: a steel spoon does not let water climb. (a) False (b) True
8. 8.True or false: a few hours of waiting is not needed for the coloured flower experiment. (a) True (b) False
9. 9.🔮 Predict: you fold the two blades the other way. What changes? (a) it falls upward (b) it does not fall (c) it turns blue (d) it spins the other way
10. 10.True or false: a ball of clay floats on water. (a) True (b) False
11. 11.🔮 Predict: a stem is split in two, one half in red water and one in blue. What do the petals do? (a) they stay white (b) they fall off at once (c) they all turn green (d) they turn two colours
12. 12.💧 Which of these is evaporation? (a) making ice lollies (b) a misty bathroom mirror (c) wet hair drying (d) ice becoming water
13. 13.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is magnetic (c) it is heavier (d) it will not break
14. 14.True or false: a magnet is not needed for the water rainbow. (a) False (b) True
15. 15.True or false: sugar in warm water dissolves faster. (a) True (b) False
16. 16.True or false: very salty water is less dense than water. (a) True (b) False
17. 17.🧺 Do we need a balloon for the coloured flower experiment? (a) not needed (b) needed
18. 18.🔍 Which is the odd one out? (a) an empty capped bottle (b) a dry leaf (c) a ping-pong ball (d) a coin
19. 19.🔍 Which is the odd one out? (a) a plastic ruler (b) a glass marble (c) a steel spoon (d) a cotton thread
20. 20.True or false: sugar stirred well dissolves faster. (a) False (b) True
21. 21.True or false: a flower stem lets water climb up it. (a) False (b) True
22. 22.🛟 How should you check if the sugar has dissolved? (a) poke it with a finger (b) smell it closely (c) look for leftover grains (d) taste it
23. 23.🧺 Which of these is not needed for the density tower? (a) water with food colour (b) a spoon (c) cooking oil (d) yeast
24. 24.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) nothing ever happens (b) it sinks at once (c) colour climbs up it (d) it turns to plastic
25. 25.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) yeast (b) two chairs (c) sticky tape (d) a balloon
26. 26.🥄 Which of these dissolves faster? (a) sugar stirred well (b) sugar in icy water (c) sugar left unstirred (d) a big sugar cube
27. 27.True or false: a mirror is not needed for the card-on-a-glass trick. (a) True (b) False
28. 28.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is what we measure. (a) True (b) False
29. 29.🧺 Do we need a balloon for the float-or-sink test? (a) needed (b) not needed
30. 30.🔍 Which is the odd one out? (a) a magnetic chess set (b) a drinking straw (c) a bicycle pump (d) a vacuum cleaner
31. 31.🍯 Is air denser or less dense than water? (a) denser than water (b) less dense than water
32. 32.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
33. 33.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is kept the same? (a) how many drops form (b) the size of the bowl (c) sun or shade
34. 34.⚖️ 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 three liquids is kept the same. (a) False (b) True
35. 35.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) prisms (b) clouds (c) balloons (d) magnets
36. 36.True or false: a coin falls fast through the air. (a) False (b) True
37. 37.🧺 Do we need a magnet for the coloured flower experiment? (a) needed (b) not needed
38. 38.🛟 Which is a safe rule for the balloon rocket? (a) put string round a neck (b) aim it at your friend (c) blow it till it bursts (d) keep it away from faces
39. 39.True or false: the balloon goes forward. (a) True (b) False
40. 40.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a glass of water (b) a white flower (c) food colour (d) turmeric powder

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