Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 516 · 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 pebble floats on water. (a) True (b) False
2. 2.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: the amount of water is what we measure. (a) False (b) True
3. 3.🧺 Do we need a clock or timer for the dissolving test? (a) needed (b) not needed
4. 4.🧺 Do we need a sunny window for the water rainbow? (a) needed (b) not needed
5. 5.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the kind of sugar”? (a) we change it (b) we measure it (c) we keep it the same
6. 6.🧺 Which of these is not needed for the paper helicopter? (a) a ruler (b) safety scissors (c) a paper clip (d) a balloon
7. 7.🫗 Why does cooking oil float on top of water? (a) oil is less dense (b) oil is hot (c) oil is heavier (d) oil is sticky
8. 8.🥄 Which of these dissolves slower? (a) sugar stirred well (b) sugar in icy water (c) powdered sugar (d) sugar in warm water
9. 9.True or false: air from the balloon goes backward. (a) False (b) True
10. 10.⚖️ 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 keep it the same (c) we change it
11. 11.True or false: a mirror is needed for the balloon rocket. (a) True (b) False
12. 12.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a sink or a bucket (c) a magnet (d) a glass of water
13. 13.💧 Dip a sugar cube into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
14. 14.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) the bottle is magnetic (c) air inside pushes back (d) water is hiding there
15. 15.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a magnet (b) safety scissors (c) a strip of paper (d) a ruler
16. 16.🔍 You drop a coin into a tub of water. What do you see? (a) it sinks (b) it dissolves (c) it floats (d) it bounces up
17. 17.🔮 Predict: you blow the balloon up only a little. What happens? (a) it turns into a kite (b) it flies off the string (c) it goes much farther (d) it goes less far
18. 18.🥄 Does powdered sugar dissolve faster or slower? (a) faster (b) slower
19. 19.🔮 Predict: wet clothes are hung out on a sunny, windy day. How do they dry? (a) they turn to ice (b) slower (c) faster (d) they never dry
20. 20.📘 Every push has an equal push in the opposite direction. Which toy shows this? (a) a mirror (b) a balloon rocket (c) a fridge magnet (d) a sundial
21. 21.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: how full the glass is is the one thing we change. (a) False (b) True
22. 22.🧺 Which of these is needed for the density tower? (a) a spoon (b) a magnet (c) yeast (d) a mirror
23. 23.True or false: yeast is not needed for the balloon rocket. (a) True (b) False
24. 24.🔮 A cork floats in tap water. What happens in very salty water? (a) it turns white (b) it still floats (c) it sinks (d) it dissolves
25. 25.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) water with food colour (b) a tall clear glass (c) turmeric powder (d) a spoon
26. 26.🎈 Air rushes out of the back of the balloon. Which way does the balloon move? (a) backward (b) it stays still (c) straight down (d) forward
27. 27.☀️ What is white sunlight really made of? (a) tiny drops of water (b) many colours mixed (c) tiny bits of dust (d) only yellow light
28. 28.🧺 Which of these is needed for the card-on-a-glass trick? (a) a stiff postcard (b) a magnet (c) a battery cell (d) a balloon
29. 29.🎈 What is the job of the straw on the string? (a) it blows air in (b) it makes it heavier (c) it holds water (d) it guides the balloon
30. 30.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is the one thing we change? (a) the drop height (b) the length of the blades (c) the kind of paper (d) the person dropping
31. 31.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the length of the stem”? (a) we measure it (b) we keep it the same (c) we change it
32. 32.🌊 What pushes a floating cork upward? (a) the air above (b) the tub (c) the cork itself (d) the water
33. 33.🧺 Do we need a drinking straw for the balloon rocket? (a) not needed (b) needed
34. 34.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a towel for spills (b) a battery cell (c) small test objects (d) a tub of water
35. 35.🧺 Do we need food colour for the coloured flower experiment? (a) not needed (b) needed
36. 36.🧺 Which of these is needed for the coloured flower experiment? (a) turmeric powder (b) a mirror (c) a glass of water (d) a magnet
37. 37.🧺 Which of these is needed for the coloured flower experiment? (a) a white flower (b) turmeric powder (c) a mirror (d) yeast
38. 38.True or false: turmeric powder is needed for the density tower. (a) False (b) True
39. 39.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the tub of water”? (a) we measure it (b) we keep it the same (c) we change it
40. 40.🧺 Do we need a clear glass of water for the water rainbow? (a) needed (b) not needed

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