Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 274 · 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.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is the one thing we change? (a) the same white paper (b) the time of day (c) the same window (d) the amount of water
2. 2.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
3. 3.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) food colour (b) a magnet (c) a few hours of waiting (d) a glass of water
4. 4.🧺 Which of these is needed for the water cycle bowl? (a) a big bowl (b) turmeric powder (c) a magnet (d) yeast
5. 5.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) it sinks at once (b) colour climbs up it (c) it turns to plastic (d) nothing ever happens
6. 6.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) a teaspoon (b) honey (c) two clear glasses (d) cold water
7. 7.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) balloons (b) clouds (c) prisms (d) magnets
8. 8.🧺 Which of these is not needed for the density tower? (a) a magnet (b) a tall clear glass (c) water with food colour (d) cooking oil
9. 9.🔮 Predict: you add two more paper clips. How does it fall? (a) it stops in the air (b) faster (c) slower (d) it floats up
10. 10.🧺 Do we need two chairs for the balloon rocket? (a) not needed (b) needed
11. 11.🔍 Which is the odd one out? (a) a sugar cube (b) a flower stem (c) a rubber eraser (d) a cotton thread
12. 12.🧺 Do we need a glass of water for the coloured flower experiment? (a) needed (b) not needed
13. 13.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “how full the glass is”? (a) we change it (b) we measure it (c) we keep it the same
14. 14.🔮 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
15. 15.🍯 Is a pebble denser or less dense than water? (a) less dense than water (b) denser than water
16. 16.🛟 Why should the glass of water stand on a steady, flat place? (a) so it turns blue (b) so the Sun moves (c) so it gets hot (d) so it does not fall
17. 17.🧺 Which of these is needed for the density tower? (a) a battery cell (b) cooking oil (c) a balloon (d) a magnet
18. 18.🔍 Which is the odd one out? (a) sugar (b) baking soda (c) table salt (d) sawdust
19. 19.🌈 How many colours do we name in a rainbow (VIBGYOR)?
20. 20.⚖️ 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 change it (b) we keep it the same (c) we measure it
21. 21.🧺 Do we need a battery cell for the density tower? (a) not needed (b) needed
22. 22.True or false: honey is needed for the density tower. (a) False (b) True
23. 23.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: the time we wait is the one thing we change. (a) True (b) False
24. 24.🧺 Which of these is not needed for the paper helicopter? (a) a balloon (b) safety scissors (c) a paper clip (d) a strip of paper
25. 25.⚖️ 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) sun or shade (b) the time we wait (c) how many drops form (d) the cling film cover
26. 26.🔍 Which is the odd one out? (a) air (b) a cork (c) a pebble (d) a ping-pong ball
27. 27.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the amount of sugar is kept the same. (a) False (b) True
28. 28.🧺 Which of these is needed for the density tower? (a) a balloon (b) water with food colour (c) a magnet (d) turmeric powder
29. 29.💧 What happens to water vapour when it touches the cold cling film? (a) it disappears (b) it turns to salt (c) it turns to drops (d) it turns to smoke
30. 30.🍯 Is a glass marble denser or less dense than water? (a) denser than water (b) less dense than water
31. 31.🧺 Do we need water for the water cycle bowl? (a) not needed (b) needed
32. 32.🛟 Why should we wipe up spilled oil at once? (a) oil makes it rain (b) spilled oil is slippery (c) oil turns into honey (d) oil attracts magnets
33. 33.💧 Which of these is condensation? (a) drops under a pot lid (b) butter going runny (c) snow turning to water (d) wet clothes drying
34. 34.🛟 Which of these sinks in water? (a) an ice-cream stick (b) an ice cube (c) a coin (d) a dry leaf
35. 35.True or false: making ice lollies is evaporation. (a) True (b) False
36. 36.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) yeast (b) a small cup (c) sunlight (d) a big bowl
37. 37.🧺 Do we need turmeric powder for the water cycle bowl? (a) needed (b) not needed
38. 38.🌈 In VIBGYOR, what number colour is yellow?
39. 39.🚀 In “push back, move forward”, which way does the swimmer go? (a) goes backward (b) goes forward
40. 40.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the amount of water”? (a) we measure it (b) we change it (c) we keep it the same

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