Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 922 · 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 balloon is needed for the water rainbow. (a) False (b) True
2. 2.🔍 Which is the odd one out? (a) sugar (b) sand (c) glucose powder (d) table salt
3. 3.True or false: a compass needle works by magnetism. (a) True (b) False
4. 4.🧺 Which of these is needed for the dissolving test? (a) a clock or timer (b) a mirror (c) honey (d) a magnet
5. 5.🛟 Why should only a grown-up handle any hot water? (a) it changes colour (b) hot water can scald (c) hot water is heavy (d) hot water is magnetic
6. 6.🫗 Why does cooking oil float on top of water? (a) oil is less dense (b) oil is heavier (c) oil is hot (d) oil is sticky
7. 7.🔍 You drop a coin into a tub of water. What do you see? (a) it floats (b) it dissolves (c) it bounces up (d) it sinks
8. 8.📘 What does “dense” mean? (a) very thin (b) very hot (c) very colourful (d) heavy for its size
9. 9.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns brighter (b) it turns all red (c) it floats away (d) the rainbow fades
10. 10.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is what we measure? (a) the stirring (b) the water temperature (c) time to dissolve (d) the amount of water
11. 11.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
12. 12.🛟 Which is a safe rule for the balloon rocket? (a) keep it away from faces (b) aim it at your friend (c) blow it till it bursts (d) put string round a neck
13. 13.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) sticky tape (b) a long string (c) two chairs (d) yeast
14. 14.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is kept the same? (a) whether the card stays (b) the same glass (c) how full the glass is
15. 15.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) a stiff postcard (c) turmeric powder (d) a mirror
16. 16.🔮 Predict: you use a rough, thick string instead of a smooth one. (a) it goes faster (b) no change at all (c) more friction, less far (d) less friction
17. 17.🌈 How many colours do we name in a rainbow (VIBGYOR)?
18. 18.True or false: a battery cell is not needed for the float-or-sink test. (a) True (b) False
19. 19.🧺 Which of these is not needed for the float-or-sink test? (a) a towel for spills (b) a battery cell (c) a tub of water (d) a results table
20. 20.⚖️ 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 order of the layers”? (a) we measure it (b) we change it (c) we keep it the same
21. 21.True or false: cooking oil is not needed for the density tower. (a) True (b) False
22. 22.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is kept the same? (a) whether the card stays (b) the same card (c) how full the glass is
23. 23.💧 Which of these is evaporation? (a) sweat drying on skin (b) drops on a cold glass (c) dew on morning grass (d) a misty bathroom mirror
24. 24.🥛 Which of these works by air pressure? (a) a compass needle (b) a fridge magnet (c) a drinking straw (d) a magnetic chess set
25. 25.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) sugar (b) a teaspoon (c) two clear glasses (d) honey
26. 26.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same tape is kept the same. (a) False (b) True
27. 27.True or false: a few hours of waiting is not needed for the coloured flower experiment. (a) True (b) False
28. 28.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a towel (c) yeast (d) a glass of water
29. 29.🧺 Which of these is needed for the density tower? (a) turmeric powder (b) honey (c) a magnet (d) a battery cell
30. 30.🚢 Why can a heavy steel ship float on the sea? (a) its hollow shape (b) sea water is warm (c) steel is very light (d) it has a magnet
31. 31.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a pencil (b) a strip of paper (c) a magnet (d) safety scissors
32. 32.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) ice cubes (b) water (c) a big bowl (d) a magnet
33. 33.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a magnet (b) a tall clear glass (c) a spoon (d) water with food colour
34. 34.🌊 What pushes a floating cork upward? (a) the water (b) the tub (c) the air above (d) the cork itself
35. 35.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) it turns to plastic (b) colour climbs up it (c) nothing ever happens (d) it sinks at once
36. 36.🍯 Is honey denser or less dense than water? (a) less dense than water (b) denser than water
37. 37.🔍 Which is the odd one out? (a) very salty water (b) air (c) a pebble (d) a glass marble
38. 38.🔮 Predict: you blow the balloon up only a little. What happens? (a) it goes much farther (b) it flies off the string (c) it turns into a kite (d) it goes less far
39. 39.🧺 Do we need a mirror for the water cycle bowl? (a) needed (b) not needed
40. 40.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a white flower (b) a magnet (c) a glass of water (d) a few hours of waiting

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