Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 500 · 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 is less dense than water? (a) a pebble (b) a coin (c) very salty water (d) cooking oil
2. 2.🔍 Sugar is stirred into water and seems to disappear. Where did it go? (a) it sank as sand (b) it vanished for ever (c) it spread in the water (d) it became air
3. 3.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is what we measure? (a) the same straw (b) how big we blow it (c) the same string (d) distance it travels
4. 4.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is heavier (c) it is magnetic (d) it will not break
5. 5.True or false: a fridge magnet works by air pressure. (a) True (b) False
6. 6.🔍 Which is the odd one out? (a) an ice cube (b) a ping-pong ball (c) a coin (d) air
7. 7.🌈 In VIBGYOR, what number colour is green?
8. 8.True or false: yeast is not needed for the density tower. (a) False (b) True
9. 9.🧺 Which of these is needed for the density tower? (a) yeast (b) a tall clear glass (c) a mirror (d) a battery cell
10. 10.🛟 Which scissors should children use to cut the paper? (a) sharp kitchen shears (b) gardening shears (c) a paper cutter (d) safety scissors
11. 11.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is what we measure? (a) the amount of water (b) time for colour to show (c) the room it stands in (d) the kind of flower
12. 12.🧺 Do we need cold water for the dissolving test? (a) needed (b) not needed
13. 13.🛟 Does a dry leaf float or sink in water? (a) sinks (b) floats
14. 14.🧺 Do we need a balloon for the balloon rocket? (a) not needed (b) needed
15. 15.🔍 Which is the odd one out? (a) snow turning to water (b) sweat drying on skin (c) wet clothes drying (d) a puddle drying up
16. 16.🥛 Which of these works by air pressure? (a) a compass needle (b) a magnetic pin holder (c) a drinking straw (d) a fridge magnet
17. 17.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “sun or shade”? (a) we keep it the same (b) we measure it (c) we change it
18. 18.🧺 Which of these is needed for the dissolving test? (a) a mirror (b) a balloon (c) warm water (d) cotton wool
19. 19.🧺 Which of these is needed for the density tower? (a) a balloon (b) yeast (c) a battery cell (d) cooking oil
20. 20.🛟 What should you do after handling food colour? (a) lick your fingers (b) wipe them on walls (c) rub your eyes (d) wash your hands
21. 21.True or false: a feather falls fast through the air. (a) True (b) False
22. 22.🧺 Which of these is needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a balloon (c) yeast (d) a magnet
23. 23.🍯 Which of these is denser than water? (a) a cork (b) cooking oil (c) a pebble (d) an ice cube
24. 24.📘 What is water vapour? (a) salty water (b) water as a gas (c) a kind of smoke (d) tiny ice cubes
25. 25.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) prisms (b) magnets (c) clouds (d) balloons
26. 26.🍯 Which of these is denser than water? (a) cooking oil (b) air (c) an ice cube (d) honey
27. 27.🫗 Why does cooking oil float on top of water? (a) oil is less dense (b) oil is sticky (c) oil is heavier (d) oil is hot
28. 28.🛟 Which rule keeps you safe when working with sunlight? (a) look at it in a mirror (b) look at it through glass (c) never look at the Sun (d) stare at the Sun
29. 29.🧺 Which of these is needed for the water cycle bowl? (a) a magnet (b) a mirror (c) a battery cell (d) a big bowl
30. 30.💧 Which change is this: a puddle drying up? (a) freezing (b) melting (c) condensation (d) evaporation
31. 31.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the kind of paper is kept the same. (a) False (b) True
32. 32.⚖️ 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) how many drops form (b) sun or shade (c) the cling film cover
33. 33.🌊 What pushes a floating cork upward? (a) the tub (b) the cork itself (c) the air above (d) the water
34. 34.🛟 Which of these sinks in water? (a) a coin (b) a piece of thermocol (c) a dry leaf (d) a feather
35. 35.🧺 Do we need a paper clip for the paper helicopter? (a) not needed (b) needed
36. 36.🍯 Is very salty water denser or less dense than water? (a) less dense than water (b) denser than water
37. 37.🔮 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
38. 38.🌧️ The drops falling back into the bowl are like which part of the real water cycle? (a) rain (b) sunshine (c) wind (d) lightning
39. 39.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a spoon (b) a tall clear glass (c) cooking oil (d) turmeric powder
40. 40.⚖️ 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) time to reach the floor (c) the kind of paper

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