Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 203 · 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 not needed for the float-or-sink test? (a) a towel for spills (b) a tub of water (c) small test objects (d) turmeric powder
2. 2.True or false: an open sheet of paper falls slowly through the air. (a) False (b) True
3. 3.🛟 Where is a safe place to drop the helicopter from? (a) a high window ledge (b) a roof edge (c) a wobbly chair (d) from your raised hand
4. 4.⚖️ 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) how full the glass is (b) whether the card stays (c) the same glass
5. 5.🧺 Which of these is needed for the dissolving test? (a) honey (b) cold water (c) a magnet (d) a comb
6. 6.🧺 Which of these is needed for the coloured flower experiment? (a) a magnet (b) a white flower (c) a mirror (d) a battery cell
7. 7.🧺 Do we need a teaspoon for the dissolving test? (a) needed (b) not needed
8. 8.True or false: the rocket goes forward. (a) False (b) True
9. 9.💧 Which change is this: making ice lollies? (a) freezing (b) evaporation (c) melting (d) condensation
10. 10.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) yellow (b) orange (c) red (d) violet
11. 11.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is the one thing we change? (a) the amount of water (b) the same white paper (c) the same window (d) the time of day
12. 12.🍯 Which of these is denser than water? (a) a cork (b) cooking oil (c) an ice cube (d) a pebble
13. 13.🔍 Which is the odd one out? (a) a sugar cube (b) a piece of chalk (c) a steel spoon (d) a strip of cloth
14. 14.🍯 Is air denser or less dense than water? (a) denser than water (b) less dense than water
15. 15.🔍 What do you see after pouring honey, water and oil into one glass? (a) one mixed colour (b) bubbles of gas (c) the glass gets hot (d) three separate layers
16. 16.🚁 What does the paper helicopter do as it falls? (a) it flies upward (b) it spins round (c) it stays still in air (d) it turns into a ball
17. 17.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is the one thing we change? (a) how big we blow it (b) the slope of the string (c) the same string (d) the same straw
18. 18.🧊 Why does an ice cube float on water? (a) ice is very cold (b) ice is less dense (c) water is sticky (d) ice is magnetic
19. 19.🍯 Which of these is less dense than water? (a) a pebble (b) a glass marble (c) cooking oil (d) honey
20. 20.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) safety scissors (b) a ruler (c) turmeric powder (d) a pencil
21. 21.🧺 Do we need a balloon for the density tower? (a) not needed (b) needed
22. 22.🧺 Which of these is not needed for the water cycle bowl? (a) a big bowl (b) ice cubes (c) turmeric powder (d) a small cup
23. 23.🧺 Do we need a tall clear glass for the density tower? (a) not needed (b) needed
24. 24.🔍 Which is the odd one out? (a) sugar (b) food colour (c) sawdust (d) baking soda
25. 25.🛟 Why should only a grown-up handle any hot water? (a) it changes colour (b) hot water is heavy (c) hot water is magnetic (d) hot water can scald
26. 26.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) food colour (b) a glass of water (c) a mirror (d) a few hours of waiting
27. 27.💧 Dip a steel spoon into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
28. 28.🧺 Which of these is needed for the paper helicopter? (a) turmeric powder (b) a mirror (c) a ruler (d) yeast
29. 29.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic pin holder (c) a magnetic chess set (d) a medicine dropper
30. 30.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) sugar (b) cold water (c) cotton wool (d) a clock or timer
31. 31.True or false: turmeric powder is needed for the water rainbow. (a) False (b) True
32. 32.🔮 Predict: you use a rough, thick string instead of a smooth one. (a) it goes faster (b) more friction, less far (c) less friction (d) no change at all
33. 33.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) a clear glass of water (c) a magnet (d) bright sunlight
34. 34.🔮 What would change if the flower stood in plain water? (a) the stem turns blue (b) no colour change (c) the petals turn red (d) the flower glows
35. 35.🫗 Why does cooking oil float on top of water? (a) oil is less dense (b) oil is hot (c) oil is sticky (d) oil is heavier
36. 36.⚖️ 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 “how much of each liquid”? (a) we change it (b) we keep it the same (c) we measure it
37. 37.True or false: water is not needed for the water cycle bowl. (a) True (b) False
38. 38.🧺 Do we need a magnet for the paper helicopter? (a) needed (b) not needed
39. 39.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) a big bowl (b) a small cup (c) a balloon (d) water
40. 40.🧺 Which of these is needed for the balloon rocket? (a) turmeric powder (b) sticky tape (c) a magnet (d) yeast

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