Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 498 · 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.🛟 Which of these sinks in water? (a) a cork (b) a feather (c) a piece of thermocol (d) a ball of clay
2. 2.True or false: turmeric powder is needed for the water cycle bowl. (a) True (b) False
3. 3.🔮 What would change if the flower stood in plain water? (a) the petals turn red (b) the flower glows (c) the stem turns blue (d) no colour change
4. 4.True or false: a balloon is needed for the dissolving test. (a) False (b) True
5. 5.⚖️ 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 the one thing we change. (a) True (b) False
6. 6.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is what we measure? (a) the size of the bowl (b) how many drops form (c) the amount of water (d) the cling film cover
7. 7.🔍 Which is the odd one out? (a) a paper helicopter (b) a coin (c) a crumpled paper ball (d) a glass marble
8. 8.True or false: an ice-cream stick sinks in water. (a) True (b) False
9. 9.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) the rainbow fades (b) it turns all red (c) it turns brighter (d) it floats away
10. 10.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the room it stands in”? (a) we change it (b) we keep it the same (c) we measure it
11. 11.🔮 Predict: you shake oil and water hard in a closed bottle and wait. What happens? (a) they turn to honey (b) they mix for ever (c) they become solid (d) they separate again
12. 12.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: sun or shade is the one thing we change. (a) True (b) False
13. 13.🥄 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
14. 14.True or false: an ice cube is less dense than water. (a) True (b) False
15. 15.🍯 Is a coin denser or less dense than water? (a) less dense than water (b) denser than water
16. 16.🔮 Predict: you gently drop a coin into the tower. Where does it end up? (a) in the water layer (b) in the oil layer (c) at the very bottom (d) on top of the oil
17. 17.True or false: cold water is not needed for the dissolving test. (a) False (b) True
18. 18.🧺 Do we need a magnet for the float-or-sink test? (a) not needed (b) needed
19. 19.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) water is hiding there (c) air inside pushes back (d) the cap is sticky
20. 20.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is kept the same? (a) sun or shade (b) how many drops form (c) the amount of water
21. 21.🛟 Which rule keeps you safe when working with sunlight? (a) look at it through glass (b) look at it in a mirror (c) never look at the Sun (d) stare at the Sun
22. 22.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the person dropping is kept the same. (a) True (b) False
23. 23.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) sticky tape (b) a drinking straw (c) a mirror (d) a long string
24. 24.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) sand (c) water (d) smoke
25. 25.🔮 Predict: you use a rough, thick string instead of a smooth one. (a) no change at all (b) less friction (c) it goes faster (d) more friction, less far
26. 26.💧 Which of these is freezing? (a) wet clothes drying (b) a pond icing over (c) wet hair drying (d) butter going runny
27. 27.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the paper clip”? (a) we keep it the same (b) we measure it (c) we change it
28. 28.🔮 Predict: a stem is split in two, one half in red water and one in blue. What do the petals do? (a) they fall off at once (b) they all turn green (c) they stay white (d) they turn two colours
29. 29.🧺 Which of these is needed for the float-or-sink test? (a) turmeric powder (b) a towel for spills (c) a magnet (d) yeast
30. 30.🍯 Which of these is less dense than water? (a) a pebble (b) honey (c) a glass marble (d) cooking oil
31. 31.🔍 Which is the odd one out? (a) a coin (b) a fluff of cotton (c) a crumpled paper ball (d) a steel spoon
32. 32.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is the one thing we change? (a) how much of each liquid (b) the same glass (c) the order of the layers (d) the order of pouring
33. 33.💧 Which change is this: water becoming ice? (a) melting (b) evaporation (c) freezing (d) condensation
34. 34.🔍 Which is the odd one out? (a) a bicycle pump (b) a suction hook (c) a compass needle (d) a vacuum cleaner
35. 35.🔍 Which is the odd one out? (a) an empty capped bottle (b) an ice cube (c) a pebble (d) a dry leaf
36. 36.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) clouds (b) balloons (c) magnets (d) prisms
37. 37.🧺 Which of these is not needed for the float-or-sink test? (a) a towel for spills (b) a tub of water (c) a magnet (d) a results table
38. 38.📘 What is the push of air on a falling thing called? (a) magnetism (b) dissolving (c) floating (d) air resistance
39. 39.True or false: air from the balloon goes forward. (a) True (b) False
40. 40.True or false: yeast is needed for the water rainbow. (a) False (b) True

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