Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 399 · 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.True or false: food colour is not needed for the coloured flower experiment. (a) True (b) False
2. 2.True or false: sawdust dissolves in water. (a) True (b) False
3. 3.🛟 Which of these floats on water? (a) a ball of clay (b) a metal key (c) a glass marble (d) a ping-pong ball
4. 4.🚀 Which of these goes forward? (a) gas from the rocket (b) the swimmer (c) water a swimmer pushes (d) air from the balloon
5. 5.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a towel (c) a sink or a bucket (d) yeast
6. 6.🌈 How many colours do we name in a rainbow (VIBGYOR)?
7. 7.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) it sinks at once (b) colour climbs up it (c) nothing ever happens (d) it turns to plastic
8. 8.🥤 Why does juice go up a drinking straw when you sip? (a) air pushes it up (b) the straw is hot (c) juice likes plastic (d) the straw is magnetic
9. 9.🛟 Who should trim the flower stem? (a) a toddler (b) a pet (c) a grown-up (d) anyone, without looking
10. 10.🧺 Which of these is needed for the dissolving test? (a) two clear glasses (b) a comb (c) honey (d) a balloon
11. 11.⚖️ 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) False (b) True
12. 12.True or false: yeast is needed for the coloured flower experiment. (a) True (b) False
13. 13.⚖️ 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
14. 14.🧺 Do we need a pencil for the paper helicopter? (a) needed (b) not needed
15. 15.🔮 Predict: you blow the balloon up only a little. What happens? (a) it goes much farther (b) it turns into a kite (c) it flies off the string (d) it goes less far
16. 16.🧺 Do we need a ruler for the paper helicopter? (a) not needed (b) needed
17. 17.🚁 Which of these falls fast through the air? (a) a paper helicopter (b) a coin (c) a toy parachute (d) a fluff of cotton
18. 18.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is kept the same? (a) the length of the blades (b) the drop height (c) time to reach the floor
19. 19.🫗 Why does cooking oil float on top of water? (a) oil is sticky (b) oil is hot (c) oil is heavier (d) oil is less dense
20. 20.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same white paper”? (a) we measure it (b) we change it (c) we keep it the same
21. 21.🧺 Do we need yeast for the water rainbow? (a) not needed (b) needed
22. 22.True or false: ice becoming water is melting. (a) True (b) False
23. 23.🔮 Predict: you keep adding sugar to a small glass of water and stirring. What happens in the end? (a) the sugar turns to salt (b) some stays undissolved (c) all of it dissolves (d) the water turns solid
24. 24.🧺 Which of these is needed for the water rainbow? (a) turmeric powder (b) a sunny window (c) a magnet (d) a balloon
25. 25.True or false: a battery cell is needed for the density tower. (a) False (b) True
26. 26.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the amount of sugar”? (a) we keep it the same (b) we change it (c) we measure it
27. 27.📘 What pulls the paper helicopter down to the floor? (a) gravity (b) magnetism (c) the wind (d) air pressure
28. 28.🧺 Which of these is needed for the water rainbow? (a) turmeric powder (b) a battery cell (c) a clear glass of water (d) a magnet
29. 29.🛟 Why should you not over-blow the balloon? (a) it changes colour (b) it turns into a kite (c) it can pop loudly (d) it gets too heavy
30. 30.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the amount of colour”? (a) we keep it the same (b) we measure it (c) we change it
31. 31.📘 What is water vapour? (a) tiny ice cubes (b) a kind of smoke (c) salty water (d) water as a gas
32. 32.🧺 Which of these is not needed for the water cycle bowl? (a) cling film (b) ice cubes (c) water (d) yeast
33. 33.🧺 Which of these is not needed for the paper helicopter? (a) a magnet (b) safety scissors (c) a paper clip (d) a pencil
34. 34.🧺 Which of these is not needed for the float-or-sink test? (a) a towel for spills (b) a results table (c) a mirror (d) small test objects
35. 35.True or false: yeast is not needed for the water cycle bowl. (a) False (b) True
36. 36.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a towel for spills (b) yeast (c) a tub of water (d) a results table
37. 37.⚖️ 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 the layers is what we measure. (a) False (b) True
38. 38.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a magnet (b) a balloon (c) two chairs (d) a long string
39. 39.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same tape”? (a) we measure it (b) we change it (c) we keep it the same
40. 40.True or false: a magnet is not needed for the dissolving test. (a) True (b) False

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