Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 416 · 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.🛟 Why should you not over-blow the balloon? (a) it gets too heavy (b) it turns into a kite (c) it changes colour (d) it can pop loudly
2. 2.📘 Air presses on everything around us. What is this push called? (a) magnetism (b) sunlight (c) friction (d) air pressure
3. 3.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the time of day”? (a) we change it (b) we keep it the same (c) we measure it
4. 4.🧺 Do we need water for the water cycle bowl? (a) needed (b) not needed
5. 5.🥄 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
6. 6.🛟 Why should the glass of water stand on a steady, flat place? (a) so the Sun moves (b) so it gets hot (c) so it does not fall (d) so it turns blue
7. 7.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same tape is kept the same. (a) True (b) False
8. 8.🥄 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
9. 9.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to win a prize (b) to keep children safe (c) to hide the corks (d) to splash everyone
10. 10.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: time to reach the floor is what we measure. (a) False (b) True
11. 11.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
12. 12.🍯 Which of these is denser than water? (a) a cork (b) air (c) a pebble (d) a ping-pong ball
13. 13.True or false: safety scissors is needed for the paper helicopter. (a) True (b) False
14. 14.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure
15. 15.⚖️ 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 pouring is kept the same. (a) True (b) False
16. 16.🔮 What would change if the flower stood in plain water? (a) the stem turns blue (b) the flower glows (c) no colour change (d) the petals turn red
17. 17.📘 What is water vapour? (a) tiny ice cubes (b) water as a gas (c) salty water (d) a kind of smoke
18. 18.🛟 Which of these floats on water? (a) a pebble (b) a steel spoon (c) a glass marble (d) a piece of thermocol
19. 19.🛟 Does a piece of thermocol float or sink in water? (a) sinks (b) floats
20. 20.🛟 Does an empty capped bottle float or sink in water? (a) sinks (b) floats
21. 21.💧 In the covered bowl, where does the water vapour come from? (a) the cling film (b) water warmed by the Sun (c) the bowl itself (d) the air outside
22. 22.True or false: sawdust does not dissolve in water. (a) False (b) True
23. 23.🧺 Do we need a mirror for the coloured flower experiment? (a) needed (b) not needed
24. 24.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? What do we do with “the same glass”? (a) we measure it (b) we change it (c) we keep it the same
25. 25.🚁 Dropped from a raised hand, does a fluff of cotton fall slowly or fast? (a) falls slowly (b) falls fast
26. 26.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) the bottle is magnetic (c) the cap is sticky (d) air inside pushes back
27. 27.True or false: sand does not dissolve in water. (a) True (b) False
28. 28.🧺 Do we need a battery cell for the water cycle bowl? (a) not needed (b) needed
29. 29.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) it looks nicer (c) the card gets wet (d) little air left inside
30. 30.🛟 Who should trim the flower stem? (a) a grown-up (b) a toddler (c) anyone, without looking (d) a pet
31. 31.🧺 Do we need turmeric powder for the balloon rocket? (a) not needed (b) needed
32. 32.🧺 Which of these is not needed for the water rainbow? (a) bright sunlight (b) a clear glass of water (c) a battery cell (d) a sunny window
33. 33.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) a sunny window (c) a mirror (d) bright sunlight
34. 34.🔍 Which is the odd one out? (a) a toy parachute (b) a steel spoon (c) a feather (d) an open sheet of paper
35. 35.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is the one thing we change? (a) the way we turn it (b) the same glass (c) the same card (d) how full the glass is
36. 36.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the person dropping”? (a) we measure it (b) we change it (c) we keep it the same
37. 37.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is what we measure? (a) the paper clip (b) the person dropping (c) the kind of paper (d) time to reach the floor
38. 38.🧺 Which of these is not needed for the coloured flower experiment? (a) turmeric powder (b) food colour (c) a white flower (d) a few hours of waiting
39. 39.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) a teaspoon (b) honey (c) a clock or timer (d) cold water
40. 40.🔮 Predict: which dissolves faster — a sugar cube or the same amount of powdered sugar? (a) the sugar cube (b) both the same (c) neither of them (d) powdered sugar

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