Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 726 · 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 time of day (b) the amount of water (c) the same glass (d) the same white paper
2. 2.🔍 Which is the odd one out? (a) a stone (b) a steel spoon (c) a feather (d) a crumpled paper ball
3. 3.🧺 Which of these is not needed for the density tower? (a) water with food colour (b) a magnet (c) a spoon (d) a tall clear glass
4. 4.True or false: a towel for spills is needed for the float-or-sink test. (a) True (b) False
5. 5.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: how many drops form is what we measure. (a) True (b) False
6. 6.True or false: a balloon is needed for the dissolving test. (a) False (b) True
7. 7.🔮 Predict: an empty capped bottle floats. What happens if you fill it with sand? (a) it melts (b) it sinks (c) it turns blue (d) it floats higher
8. 8.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the stirring is the one thing we change. (a) True (b) False
9. 9.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) the card gets wet (c) it looks nicer (d) little air left inside
10. 10.🚁 Dropped from a raised hand, does a paper helicopter fall slowly or fast? (a) falls fast (b) falls slowly
11. 11.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) a mirror (b) water (c) a small cup (d) cling film
12. 12.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) violet (b) green (c) red (d) blue
13. 13.🥄 Does sugar in warm water dissolve faster or slower? (a) faster (b) slower
14. 14.True or false: a flower stem lets water climb up it. (a) True (b) False
15. 15.🧺 Do we need food colour for the coloured flower experiment? (a) needed (b) not needed
16. 16.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) sticky tape (b) turmeric powder (c) a long string (d) two chairs
17. 17.🧺 Do we need a few hours of waiting for the coloured flower experiment? (a) needed (b) not needed
18. 18.🚁 Which of these falls fast through the air? (a) a paper helicopter (b) a coin (c) a feather (d) a toy parachute
19. 19.⚖️ 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
20. 20.🛟 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
21. 21.🧺 Which of these is needed for the coloured flower experiment? (a) yeast (b) a magnet (c) turmeric powder (d) food colour
22. 22.True or false: making ice lollies is melting. (a) False (b) True
23. 23.🧺 Which of these is not needed for the dissolving test? (a) two clear glasses (b) warm water (c) a clock or timer (d) a comb
24. 24.True or false: chalk powder dissolves in water. (a) False (b) True
25. 25.True or false: an ice cube is denser than water. (a) True (b) False
26. 26.🛟 Why should we wipe up spilled oil at once? (a) oil turns into honey (b) oil attracts magnets (c) spilled oil is slippery (d) oil makes it rain
27. 27.🧺 Which of these is needed for the coloured flower experiment? (a) yeast (b) a mirror (c) a white flower (d) turmeric powder
28. 28.🔮 Predict: you keep adding sugar to a small glass of water and stirring. What happens in the end? (a) all of it dissolves (b) the sugar turns to salt (c) some stays undissolved (d) the water turns solid
29. 29.🔍 Which is the odd one out? (a) a compass needle (b) a medicine dropper (c) a magnetic chess set (d) a fridge magnet
30. 30.🧺 Do we need turmeric powder for the float-or-sink test? (a) needed (b) not needed
31. 31.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the slope of the string is kept the same. (a) False (b) True
32. 32.🔮 Predict: you add two more paper clips. How does it fall? (a) slower (b) it stops in the air (c) faster (d) it floats up
33. 33.True or false: a feather floats on water. (a) True (b) False
34. 34.True or false: a towel is needed for the card-on-a-glass trick. (a) False (b) True
35. 35.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is what we measure? (a) time to reach the floor (b) the paper clip (c) the person dropping (d) the drop height
36. 36.🎈 What is the job of the straw on the string? (a) it holds water (b) it blows air in (c) it guides the balloon (d) it makes it heavier
37. 37.🧺 Do we need a battery cell for the paper helicopter? (a) not needed (b) needed
38. 38.True or false: a coin is denser than water. (a) False (b) True
39. 39.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) two chairs (b) a balloon (c) a mirror (d) sticky tape
40. 40.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the way we turn it”? (a) we measure it (b) we keep it the same (c) we change it

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