Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 518 · 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 — do longer blades make the paper helicopter fall more slowly? What do we do with “time to reach the floor”? (a) we keep it the same (b) we measure it (c) we change it
2. 2.True or false: sawdust does not dissolve in water. (a) True (b) False
3. 3.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same glass”? (a) we change it (b) we measure it (c) we keep it the same
4. 4.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) air (c) smoke (d) sand
5. 5.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the kind of clay”? (a) we measure it (b) we keep it the same (c) we change it
6. 6.True or false: a towel is not needed for the card-on-a-glass trick. (a) True (b) False
7. 7.🧺 Do we need a mirror for the paper helicopter? (a) not needed (b) needed
8. 8.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns all red (b) it turns brighter (c) it floats away (d) the rainbow fades
9. 9.🌈 How many colours do we name in a rainbow (VIBGYOR)?
10. 10.🛟 Who should trim the flower stem? (a) anyone, without looking (b) a toddler (c) a pet (d) a grown-up
11. 11.💧 Which of these does not let water climb? (a) a flower stem (b) a strip of cloth (c) a piece of chalk (d) a plastic ruler
12. 12.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
13. 13.🥄 Which of these dissolves faster? (a) sugar left unstirred (b) a big sugar cube (c) sugar stirred well (d) sugar in icy water
14. 14.🧺 Which of these is not needed for the density tower? (a) a tall clear glass (b) water with food colour (c) honey (d) a mirror
15. 15.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a white flower (b) food colour (c) a few hours of waiting (d) a mirror
16. 16.⚖️ 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) False (b) True
17. 17.🍯 Is air denser or less dense than water? (a) less dense than water (b) denser than water
18. 18.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same string is the one thing we change. (a) True (b) False
19. 19.🚁 Dropped from a raised hand, does a feather fall slowly or fast? (a) falls slowly (b) falls fast
20. 20.⚖️ 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 window (b) the same white paper (c) the time of day (d) the amount of water
21. 21.🍯 Is honey denser or less dense than water? (a) less dense than water (b) denser than water
22. 22.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is the one thing we change? (a) the amount of water (b) the stirring (c) time to dissolve (d) the water temperature
23. 23.🔍 Which is the odd one out? (a) a glass marble (b) a ball of clay (c) a steel spoon (d) a cork
24. 24.🧺 Do we need ice cubes for the water cycle bowl? (a) not needed (b) needed
25. 25.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “brightness of rainbow”? (a) we change it (b) we measure it (c) we keep it the same
26. 26.🧺 Do we need turmeric powder for the float-or-sink test? (a) not needed (b) needed
27. 27.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the amount of water”? (a) we keep it the same (b) we change it (c) we measure it
28. 28.🔮 Predict: an empty capped bottle floats. What happens if you fill it with sand? (a) it melts (b) it floats higher (c) it sinks (d) it turns blue
29. 29.🧺 Do we need yeast for the balloon rocket? (a) needed (b) not needed
30. 30.🚁 What does the paper helicopter do as it falls? (a) it flies upward (b) it turns into a ball (c) it spins round (d) it stays still in air
31. 31.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a battery cell (b) a glass of water (c) a sink or a bucket (d) a stiff postcard
32. 32.🧺 Do we need a balloon for the water rainbow? (a) needed (b) not needed
33. 33.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the room it stands in”? (a) we change it (b) we measure it (c) we keep it the same
34. 34.True or false: a plastic ruler does not let water climb. (a) True (b) False
35. 35.🧺 Which of these is not needed for the float-or-sink test? (a) small test objects (b) a towel for spills (c) a tub of water (d) turmeric powder
36. 36.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is the one thing we change? (a) the length of the blades (b) the drop height (c) time to reach the floor (d) the person dropping
37. 37.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a drinking straw (c) a fridge magnet (d) a bicycle pump
38. 38.🧺 Do we need a magnet for the coloured flower experiment? (a) not needed (b) needed
39. 39.🍯 Which of these is denser than water? (a) a cork (b) air (c) cooking oil (d) a coin
40. 40.🧺 Which of these is needed for the density tower? (a) turmeric powder (b) yeast (c) a tall clear glass (d) a balloon

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