Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 170 · 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 is the odd one out? (a) a feather (b) a ping-pong ball (c) a steel spoon (d) a cork
2. 2.🔮 A cork floats in tap water. What happens in very salty water? (a) it still floats (b) it turns white (c) it dissolves (d) it sinks
3. 3.🧺 Which of these is needed for the water rainbow? (a) a battery cell (b) yeast (c) a mirror (d) a clear glass of water
4. 4.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) water is hiding there (c) the bottle is magnetic (d) the cap is sticky
5. 5.True or false: a big sugar cube dissolves slower. (a) False (b) True
6. 6.🌈 How many colours do we name in a rainbow (VIBGYOR)?
7. 7.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) violet (b) blue (c) green (d) red
8. 8.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is the one thing we change? (a) the way we turn it (b) whether the card stays (c) how full the glass is (d) the same card
9. 9.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “how big we blow it”? (a) we measure it (b) we change it (c) we keep it the same
10. 10.🍯 Which of these is denser than water? (a) a cork (b) an ice cube (c) cooking oil (d) very salty water
11. 11.True or false: two clear glasses is not needed for the dissolving test. (a) False (b) True
12. 12.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: whether it floats is the one thing we change. (a) True (b) False
13. 13.🧺 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) a sink or a bucket (d) yeast
14. 14.True or false: yeast is needed for the water cycle bowl. (a) False (b) True
15. 15.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) honey (b) a balloon (c) water with food colour (d) a spoon
16. 16.⚖️ 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 keep it the same (b) we measure it (c) we change it
17. 17.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same tape is what we measure. (a) False (b) True
18. 18.🔍 What do you see a day after a white flower stands in blue water? (a) the flower floats away (b) the stem turns to ice (c) the water turns green (d) the petals turn bluish
19. 19.True or false: honey is less dense than water. (a) False (b) True
20. 20.🔮 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
21. 21.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same glass”? (a) we measure it (b) we keep it the same (c) we change it
22. 22.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is kept the same? (a) the length of the blades (b) time to reach the floor (c) the paper clip
23. 23.True or false: sugar in icy water dissolves slower. (a) False (b) True
24. 24.🔍 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 card stays on (c) the water turns to ice (d) the glass breaks
25. 25.🎈 Air rushes out of the back of the balloon. Which way does the balloon move? (a) straight down (b) backward (c) forward (d) it stays still
26. 26.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) smoke (c) sand (d) water
27. 27.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the tub of water is kept the same. (a) False (b) True
28. 28.💧 What happens to water vapour when it touches the cold cling film? (a) it disappears (b) it turns to smoke (c) it turns to drops (d) it turns to salt
29. 29.True or false: a coin is less dense than water. (a) True (b) False
30. 30.🧺 Do we need a magnet for the dissolving test? (a) needed (b) not needed
31. 31.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is the one thing we change? (a) the shape of the clay (b) the amount of clay (c) whether it floats (d) the tub of water
32. 32.🛟 What should you do with wet floors after the experiment? (a) leave them wet (b) wipe them dry (c) pour more water (d) slide on them
33. 33.🧺 Do we need a glass of water for the coloured flower experiment? (a) not needed (b) needed
34. 34.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to win a prize (b) to hide the corks (c) to splash everyone (d) to keep children safe
35. 35.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) True (b) False
36. 36.🛟 Which rule keeps the density tower experiment safe? (a) taste each layer (b) pour it on the floor (c) throw the glass (d) do not lick the spoon
37. 37.🧺 Do we need a mirror for the density tower? (a) needed (b) not needed
38. 38.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a battery cell (b) food colour (c) a few hours of waiting (d) a white flower
39. 39.True or false: cooking oil dissolves in water. (a) True (b) False
40. 40.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) a small cup (b) a big bowl (c) a battery cell (d) water

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