Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 585 · 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.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns brighter (b) it turns all red (c) the rainbow fades (d) it floats away
2. 2.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: how big we blow it is kept the same. (a) False (b) True
3. 3.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the amount of water is the one thing we change. (a) False (b) True
4. 4.📘 What is it called when water climbs up thin tubes or paper by itself? (a) evaporation (b) magnetism (c) capillary action (d) melting
5. 5.True or false: a rubber eraser lets water climb up it. (a) False (b) True
6. 6.True or false: turmeric powder is needed for the water rainbow. (a) True (b) False
7. 7.🍯 Why does honey sink to the bottom of the glass? (a) it is the coldest (b) it is yellow (c) it is the densest (d) it is the stickiest
8. 8.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
9. 9.🛟 What should you do with wet floors after the experiment? (a) wipe them dry (b) leave them wet (c) pour more water (d) slide on them
10. 10.True or false: a mirror is needed for the coloured flower experiment. (a) True (b) False
11. 11.🔍 Which is the odd one out? (a) an iron nail (b) a metal key (c) a steel spoon (d) an ice cube
12. 12.🧺 Do we need turmeric powder for the float-or-sink test? (a) needed (b) not needed
13. 13.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: the size of the bowl is the one thing we change. (a) False (b) True
14. 14.🔮 A big log and a small pebble go into a pond. Which one floats? (a) the small pebble (b) both of them (c) neither of them (d) the big log
15. 15.🔍 Which is the odd one out? (a) a plastic ruler (b) a piece of foil (c) a rubber eraser (d) a flower stem
16. 16.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the drop height”? (a) we measure it (b) we keep it the same (c) we change it
17. 17.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same glass”? (a) we measure it (b) we change it (c) we keep it the same
18. 18.⚖️ 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 measure it (c) we keep it the same
19. 19.🧺 Do we need a tall clear glass for the density tower? (a) not needed (b) needed
20. 20.🧺 Which of these is needed for the float-or-sink test? (a) yeast (b) a magnet (c) a towel for spills (d) turmeric powder
21. 21.💧 Which of these does not let water climb? (a) a flower stem (b) a steel spoon (c) a piece of chalk (d) a sugar cube
22. 22.True or false: a glass marble falls slowly through the air. (a) True (b) False
23. 23.🧺 Which of these is needed for the density tower? (a) a battery cell (b) water with food colour (c) a balloon (d) a magnet
24. 24.True or false: a drinking straw is not needed for the balloon rocket. (a) False (b) True
25. 25.🧺 Do we need honey for the density tower? (a) needed (b) not needed
26. 26.🛟 Which is a safe rule for the balloon rocket? (a) put string round a neck (b) aim it at your friend (c) blow it till it bursts (d) keep it away from faces
27. 27.True or false: a vacuum cleaner works by magnetism. (a) False (b) True
28. 28.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is the one thing we change? (a) whether it floats (b) the tub of water (c) the shape of the clay (d) the amount of clay
29. 29.🧺 Which of these is needed for the dissolving test? (a) cotton wool (b) a teaspoon (c) a magnet (d) a mirror
30. 30.🛟 Which of these floats on water? (a) a pebble (b) an ice cube (c) a coin (d) a glass marble
31. 31.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the size of the bowl”? (a) we change it (b) we keep it the same (c) we measure it
32. 32.📘 What pulls the paper helicopter down to the floor? (a) gravity (b) magnetism (c) air pressure (d) the wind
33. 33.🔍 Which is the odd one out? (a) sawdust (b) sand (c) table salt (d) chalk powder
34. 34.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) a sheet of white paper (c) yeast (d) a clear glass of water
35. 35.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card flies away (b) the water turns to ice (c) the glass breaks (d) the card stays on
36. 36.🔮 Predict: does stirring make sugar dissolve faster or slower? (a) faster (b) not at all (c) the same (d) slower
37. 37.🍯 Which of these is less dense than water? (a) honey (b) cooking oil (c) a glass marble (d) a coin
38. 38.⚖️ 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 three liquids”? (a) we change it (b) we keep it the same (c) we measure it
39. 39.🧺 Do we need bright sunlight for the water rainbow? (a) needed (b) not needed
40. 40.🔮 A ball of clay sinks. What happens if you press it into a thin boat shape? (a) it can float (b) it dissolves (c) it turns to stone (d) it sinks faster

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