Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 790 · 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 needed for the density tower? (a) honey (b) a battery cell (c) turmeric powder (d) a magnet
2. 2.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the time of day”? (a) we change it (b) we measure it (c) we keep it the same
3. 3.🎈 What is the job of the straw on the string? (a) it holds water (b) it makes it heavier (c) it blows air in (d) it guides the balloon
4. 4.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is the one thing we change? (a) the time we wait (b) the cling film cover (c) how many drops form (d) sun or shade
5. 5.True or false: yeast is needed for the card-on-a-glass trick. (a) False (b) True
6. 6.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a magnet (c) a stiff postcard (d) turmeric powder
7. 7.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) a magnet (c) bright sunlight (d) a sunny window
8. 8.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “whether it floats”? (a) we measure it (b) we keep it the same (c) we change it
9. 9.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the slope of the string”? (a) we measure it (b) we change it (c) we keep it the same
10. 10.🚁 Which of these falls slowly through the air? (a) a stone (b) a coin (c) a paper helicopter (d) a crumpled paper ball
11. 11.🧺 Which of these is needed for the float-or-sink test? (a) yeast (b) turmeric powder (c) a battery cell (d) small test objects
12. 12.🛟 What should you do with wet floors after the experiment? (a) wipe them dry (b) slide on them (c) pour more water (d) leave them wet
13. 13.🧺 Which of these is not needed for the dissolving test? (a) warm water (b) a clock or timer (c) cold water (d) a balloon
14. 14.💧 Which change is this: wet hair drying? (a) evaporation (b) freezing (c) melting (d) condensation
15. 15.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns all red (b) it turns brighter (c) it floats away (d) the rainbow fades
16. 16.True or false: an iron nail sinks in water. (a) True (b) False
17. 17.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same string is the one thing we change. (a) True (b) False
18. 18.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is the one thing we change? (a) the same string (b) distance it travels (c) the same tape (d) how big we blow it
19. 19.True or false: a sheet of white paper is needed for the water rainbow. (a) True (b) False
20. 20.💧 Dip a piece of chalk into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
21. 21.🛟 Which of these floats on water? (a) a piece of thermocol (b) a ball of clay (c) a coin (d) a steel spoon
22. 22.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
23. 23.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a battery cell (c) a sink or a bucket (d) a stiff postcard
24. 24.🔮 Predict: a bowl of water is left uncovered in the hot sun all day. What happens? (a) it turns to ice (b) some water evaporates (c) it turns to salt (d) the water increases
25. 25.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to splash everyone (b) to win a prize (c) to keep children safe (d) to hide the corks
26. 26.True or false: water from the oars goes forward. (a) False (b) True
27. 27.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the paper clip”? (a) we change it (b) we keep it the same (c) we measure it
28. 28.🔍 Which is the odd one out? (a) a steel spoon (b) a piece of foil (c) a plastic ruler (d) a sugar cube
29. 29.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a few hours of waiting (b) a white flower (c) yeast (d) food colour
30. 30.🧺 Do we need yeast for the float-or-sink test? (a) not needed (b) needed
31. 31.🔍 Which is the odd one out? (a) wet hair drying (b) a misty bathroom mirror (c) sweat drying on skin (d) wet clothes drying
32. 32.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) yeast (c) a sink or a bucket (d) a glass of water
33. 33.🚁 Why does the paper helicopter fall slowly? (a) the floor pushes it (b) a magnet holds it (c) it has no weight (d) air pushes on its blades
34. 34.💧 Dip a rubber eraser into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
35. 35.🚁 Dropped from a raised hand, does a glass marble fall slowly or fast? (a) falls slowly (b) falls fast
36. 36.🧺 Do we need a mirror for the water cycle bowl? (a) not needed (b) needed
37. 37.🌈 How many colours do we name in a rainbow (VIBGYOR)?
38. 38.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is what we measure? (a) the same white paper (b) the same glass (c) the amount of water (d) brightness of rainbow
39. 39.🔍 Which is the odd one out? (a) a misty bathroom mirror (b) water becoming ice (c) dew on morning grass (d) drops on a cold glass
40. 40.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: how big we blow it is kept the same. (a) True (b) False

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