Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 362 · 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: a toy parachute falls slowly through the air. (a) True (b) False
2. 2.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: how big we blow it is the one thing we change. (a) False (b) True
3. 3.🧺 Do we need honey for the density tower? (a) not needed (b) needed
4. 4.🛟 Why should only a grown-up handle any hot water? (a) hot water is magnetic (b) hot water can scald (c) hot water is heavy (d) it changes colour
5. 5.True or false: powdered sugar dissolves slower. (a) True (b) False
6. 6.🛟 Why should you not over-blow the balloon? (a) it turns into a kite (b) it changes colour (c) it gets too heavy (d) it can pop loudly
7. 7.🧺 Which of these is needed for the water rainbow? (a) a battery cell (b) a mirror (c) a sheet of white paper (d) turmeric powder
8. 8.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) vinegar (b) sticky tape (c) a drinking straw (d) a balloon
9. 9.🛟 Which scissors should children use to cut the paper? (a) gardening shears (b) a paper cutter (c) safety scissors (d) sharp kitchen shears
10. 10.True or false: honey is needed for the density tower. (a) False (b) True
11. 11.🔮 What would change if the flower stood in plain water? (a) no colour change (b) the petals turn red (c) the stem turns blue (d) the flower glows
12. 12.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a mirror (b) a spoon (c) cooking oil (d) water with food colour
13. 13.True or false: a clock or timer is needed for the dissolving test. (a) True (b) False
14. 14.🔮 Predict: you put ice cubes on top of the cling film. What happens? (a) the bowl freezes (b) more drops form (c) fewer drops form (d) the water turns red
15. 15.🔍 Which is the odd one out? (a) a dry leaf (b) an empty capped bottle (c) an ice-cream stick (d) a pebble
16. 16.True or false: a sunny window is needed for the water rainbow. (a) False (b) True
17. 17.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the kind of sugar”? (a) we measure it (b) we keep it the same (c) we change it
18. 18.True or false: a balloon is needed for the dissolving test. (a) True (b) False
19. 19.🥄 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
20. 20.🛟 What should you do after handling food colour? (a) lick your fingers (b) wash your hands (c) rub your eyes (d) wipe them on walls
21. 21.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is what we measure? (a) whether it floats (b) the tub of water (c) the shape of the clay (d) the amount of clay
22. 22.True or false: a coin is denser than water. (a) False (b) True
23. 23.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) over a sink or bucket (c) over a laptop (d) on a bed
24. 24.🧺 Do we need a mirror for the float-or-sink test? (a) not needed (b) needed
25. 25.True or false: baking soda does not dissolve in water. (a) True (b) False
26. 26.⚖️ 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 three liquids is the one thing we change. (a) True (b) False
27. 27.🧺 Which of these is needed for the paper helicopter? (a) a mirror (b) a pencil (c) a magnet (d) turmeric powder
28. 28.True or false: honey is not needed for the dissolving test. (a) False (b) True
29. 29.🛟 Which is the safe way to do the float-or-sink test? (a) run around the tub (b) play near a deep pond (c) leave water on the floor (d) wipe up spills at once
30. 30.True or false: water from the oars goes backward. (a) False (b) True
31. 31.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) colour climbs up it (b) it sinks at once (c) nothing ever happens (d) it turns to plastic
32. 32.🧺 Which of these is not needed for the water rainbow? (a) a sheet of white paper (b) a sunny window (c) a mirror (d) bright sunlight
33. 33.🔍 Which is the odd one out? (a) sugar (b) table salt (c) small pebbles (d) baking soda
34. 34.True or false: a mirror is needed for the density tower. (a) False (b) True
35. 35.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is the one thing we change? (a) the stirring (b) time to dissolve (c) the kind of sugar (d) the water temperature
36. 36.🚀 In “push back, move forward”, which way does water a swimmer pushes go? (a) goes backward (b) goes forward
37. 37.True or false: a misty bathroom mirror is freezing. (a) False (b) True
38. 38.True or false: a towel is not needed for the card-on-a-glass trick. (a) False (b) True
39. 39.🔮 Predict: the string slopes uphill. What happens? (a) it speeds up (b) it goes backward first (c) it travels farther (d) it travels less far
40. 40.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the tub of water”? (a) we measure it (b) we change it (c) we keep it the same

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