Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 482 · 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.🔮 Predict: a bowl of water is left uncovered in the hot sun all day. What happens? (a) the water increases (b) it turns to ice (c) some water evaporates (d) it turns to salt
2. 2.🔮 Predict: the string slopes uphill. What happens? (a) it goes backward first (b) it travels farther (c) it speeds up (d) it travels less far
3. 3.🚁 Which of these falls slowly through the air? (a) a fluff of cotton (b) a coin (c) a stone (d) a crumpled paper ball
4. 4.🫗 Why does cooking oil float on top of water? (a) oil is sticky (b) oil is hot (c) oil is less dense (d) oil is heavier
5. 5.⚖️ 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 measure it (b) we change it (c) we keep it the same
6. 6.📘 What do we call light bending as it passes from air into water? (a) refraction (b) magnetism (c) reflection (d) evaporation
7. 7.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) honey (b) yeast (c) water with food colour (d) a tall clear glass
8. 8.🥄 Does sugar in icy water dissolve faster or slower? (a) faster (b) slower
9. 9.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a clear glass of water (c) a mirror (d) a sunny window
10. 10.🔍 Which is the odd one out? (a) table salt (b) sand (c) cooking oil (d) sawdust
11. 11.🛟 Which rule keeps you safe when working with sunlight? (a) look at it through glass (b) look at it in a mirror (c) stare at the Sun (d) never look at the Sun
12. 12.True or false: a steel spoon does not let water climb. (a) False (b) True
13. 13.🧺 Which of these is not needed for the water rainbow? (a) yeast (b) bright sunlight (c) a sunny window (d) a clear glass of water
14. 14.🛟 Which rule keeps the density tower experiment safe? (a) taste each layer (b) throw the glass (c) pour it on the floor (d) do not lick the spoon
15. 15.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the shape of the clay is what we measure. (a) True (b) False
16. 16.True or false: an ice cube sinks in water. (a) False (b) True
17. 17.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: the order of pouring is the one thing we change. (a) False (b) True
18. 18.🛟 Why should you not over-blow the balloon? (a) it changes colour (b) it gets too heavy (c) it can pop loudly (d) it turns into a kite
19. 19.🧺 Which of these is needed for the water cycle bowl? (a) water (b) a mirror (c) a battery cell (d) a magnet
20. 20.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the amount of sugar is the one thing we change. (a) True (b) False
21. 21.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a clear glass of water (c) a sheet of white paper (d) yeast
22. 22.🌈 How many colours do we name in a rainbow (VIBGYOR)?
23. 23.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) water (b) a big bowl (c) sunlight (d) a battery cell
24. 24.🛟 Why should we wipe up spilled oil at once? (a) oil turns into honey (b) spilled oil is slippery (c) oil attracts magnets (d) oil makes it rain
25. 25.🧺 Which of these is needed for the card-on-a-glass trick? (a) a glass of water (b) yeast (c) turmeric powder (d) a battery cell
26. 26.📘 What is it called when water climbs up thin tubes or paper by itself? (a) magnetism (b) melting (c) capillary action (d) evaporation
27. 27.True or false: a ruler is needed for the paper helicopter. (a) False (b) True
28. 28.📘 Every push has an equal push in the opposite direction. Which toy shows this? (a) a mirror (b) a sundial (c) a balloon rocket (d) a fridge magnet
29. 29.True or false: a paper clip is needed for the paper helicopter. (a) True (b) False
30. 30.🌈 In VIBGYOR, what number colour is green?
31. 31.🧺 Which of these is not needed for the density tower? (a) a tall clear glass (b) water with food colour (c) a magnet (d) honey
32. 32.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the time of day is kept the same. (a) False (b) True
33. 33.🌼 How does coloured water reach the petals? (a) it is sprayed on (b) through the air (c) through tiny stem tubes (d) it rains on them
34. 34.🧺 Which of these is needed for the water rainbow? (a) a clear glass of water (b) turmeric powder (c) a balloon (d) a mirror
35. 35.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) True (b) False
36. 36.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a ruler (b) a paper clip (c) turmeric powder (d) a strip of paper
37. 37.True or false: vinegar is not needed for the balloon rocket. (a) True (b) False
38. 38.True or false: sticky tape is not needed for the balloon rocket. (a) True (b) False
39. 39.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) over a sink or bucket (c) over a laptop (d) near a plug point
40. 40.🧺 Do we need turmeric powder for the paper helicopter? (a) not needed (b) needed

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