Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 122 · 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.🍯 Is a ping-pong ball denser or less dense than water? (a) less dense than water (b) denser than water
2. 2.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) cling film (b) sunlight (c) water (d) yeast
3. 3.🚁 Which of these falls fast through the air? (a) a paper helicopter (b) a toy parachute (c) a fluff of cotton (d) a steel spoon
4. 4.🔮 What would change if the flower stood in plain water? (a) the flower glows (b) no colour change (c) the petals turn red (d) the stem turns blue
5. 5.🧺 Which of these is not needed for the density tower? (a) a balloon (b) water with food colour (c) cooking oil (d) a tall clear glass
6. 6.True or false: a stone falls slowly through the air. (a) True (b) False
7. 7.🛟 Does a pebble float or sink in water? (a) floats (b) sinks
8. 8.🧺 Do we need two clear glasses for the dissolving test? (a) needed (b) not needed
9. 9.True or false: air from the balloon goes forward. (a) False (b) True
10. 10.🧺 Which of these is not needed for the coloured flower experiment? (a) food colour (b) a glass of water (c) a few hours of waiting (d) yeast
11. 11.True or false: a battery cell is needed for the paper helicopter. (a) True (b) False
12. 12.🧺 Do we need a battery cell for the float-or-sink test? (a) needed (b) not needed
13. 13.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) in the water layer (b) on top of the oil (c) in the honey layer (d) under the honey
14. 14.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to grow plants (c) to catch any spills (d) to cool the glass
15. 15.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the person dropping is the one thing we change. (a) True (b) False
16. 16.🛟 Which of these sinks in water? (a) a cork (b) a dry leaf (c) a feather (d) a metal key
17. 17.🚁 Dropped from a raised hand, does an open sheet of paper fall slowly or fast? (a) falls slowly (b) falls fast
18. 18.🧺 Which of these is not needed for the float-or-sink test? (a) a tub of water (b) a towel for spills (c) small test objects (d) turmeric powder
19. 19.🧺 Do we need a tub of water for the float-or-sink test? (a) needed (b) not needed
20. 20.🧺 Do we need a strip of paper for the paper helicopter? (a) needed (b) not needed
21. 21.🛟 Which of these floats on water? (a) a glass marble (b) a piece of thermocol (c) a coin (d) an iron nail
22. 22.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a sink or a bucket (c) a magnet (d) a towel
23. 23.💧 Dip a cotton thread into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
24. 24.🧺 Which of these is not needed for the dissolving test? (a) warm water (b) honey (c) sugar (d) a clock or timer
25. 25.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) honey (b) water with food colour (c) a tall clear glass (d) a balloon
26. 26.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the amount of water”? (a) we keep it the same (b) we measure it (c) we change it
27. 27.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) yeast (c) a magnet (d) a stiff postcard
28. 28.True or false: a glass of water is needed for the coloured flower experiment. (a) True (b) False
29. 29.⚖️ 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 kind of paper (c) time to reach the floor (d) the paper clip
30. 30.🔮 Predict: you put ice cubes on top of the cling film. What happens? (a) fewer drops form (b) the water turns red (c) more drops form (d) the bowl freezes
31. 31.True or false: a battery cell is not needed for the paper helicopter. (a) False (b) True
32. 32.🚁 Which of these falls slowly through the air? (a) a steel spoon (b) a fluff of cotton (c) a glass marble (d) a coin
33. 33.🧺 Do we need a mirror for the paper helicopter? (a) needed (b) not needed
34. 34.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) the rainbow fades (b) it turns brighter (c) it floats away (d) it turns all red
35. 35.True or false: yeast is needed for the water rainbow. (a) False (b) True
36. 36.🚁 Why does the paper helicopter fall slowly? (a) the floor pushes it (b) a magnet holds it (c) it has no weight (d) air pushes on its blades
37. 37.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) False (b) True
38. 38.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a drinking straw (b) a long string (c) a battery cell (d) a balloon
39. 39.🥄 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
40. 40.🛟 Which rule keeps you safe when working with sunlight? (a) look at it in a mirror (b) never look at the Sun (c) stare at the Sun (d) look at it through glass

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