Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 680 · 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: sand dissolves in water. (a) True (b) False
2. 2.🥄 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
3. 3.🍯 Which of these is less dense than water? (a) honey (b) a coin (c) a glass marble (d) an ice cube
4. 4.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to hide the corks (b) to splash everyone (c) to win a prize (d) to keep children safe
5. 5.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same string”? (a) we measure it (b) we keep it the same (c) we change it
6. 6.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same white paper”? (a) we keep it the same (b) we measure it (c) we change it
7. 7.🎈 What is the job of the straw on the string? (a) it blows air in (b) it holds water (c) it guides the balloon (d) it makes it heavier
8. 8.🌈 In VIBGYOR, what number colour is green?
9. 9.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) air inside pushes back (c) the cap is sticky (d) the bottle is magnetic
10. 10.🛟 What should you do with wet floors after the experiment? (a) leave them wet (b) pour more water (c) wipe them dry (d) slide on them
11. 11.🧺 Which of these is needed for the water cycle bowl? (a) a magnet (b) yeast (c) a big bowl (d) a battery cell
12. 12.🔍 Which is the odd one out? (a) a cork (b) a ping-pong ball (c) air (d) very salty water
13. 13.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) a sheet of white paper (c) a mirror (d) bright sunlight
14. 14.📘 What pulls the paper helicopter down to the floor? (a) the wind (b) gravity (c) air pressure (d) magnetism
15. 15.🛟 Why should the glass of water stand on a steady, flat place? (a) so it turns blue (b) so it gets hot (c) so the Sun moves (d) so it does not fall
16. 16.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same straw”? (a) we change it (b) we measure it (c) we keep it the same
17. 17.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a strip of paper (b) a pencil (c) a battery cell (d) safety scissors
18. 18.🔮 Predict: the string slopes uphill. What happens? (a) it travels farther (b) it travels less far (c) it goes backward first (d) it speeds up
19. 19.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) water with food colour (b) honey (c) a spoon (d) a battery cell
20. 20.🔍 Which is the odd one out? (a) sawdust (b) sugar (c) small pebbles (d) sand
21. 21.🧺 Which of these is needed for the water rainbow? (a) a sunny window (b) yeast (c) a balloon (d) a magnet
22. 22.🚀 Which of these goes backward? (a) the swimmer (b) the rocket (c) water from the oars (d) the rowing boat
23. 23.True or false: honey is needed for the density tower. (a) False (b) True
24. 24.🧺 Do we need honey for the density tower? (a) not needed (b) needed
25. 25.🛟 Which rule keeps you safe when working with sunlight? (a) look at it in a mirror (b) look at it through glass (c) never look at the Sun (d) stare at the Sun
26. 26.🔮 What would change if the flower stood in plain water? (a) the flower glows (b) no colour change (c) the stem turns blue (d) the petals turn red
27. 27.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: time for colour to show is the one thing we change. (a) True (b) False
28. 28.📘 What is the push of air on a falling thing called? (a) magnetism (b) dissolving (c) floating (d) air resistance
29. 29.🛟 Does a glass marble float or sink in water? (a) floats (b) sinks
30. 30.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the time we wait”? (a) we keep it the same (b) we change it (c) we measure it
31. 31.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) water (b) sunlight (c) a big bowl (d) a magnet
32. 32.🧺 Do we need warm water for the dissolving test? (a) needed (b) not needed
33. 33.🍯 Which of these is denser than water? (a) cooking oil (b) an ice cube (c) a pebble (d) a ping-pong ball
34. 34.🛟 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
35. 35.🧺 Which of these is needed for the coloured flower experiment? (a) yeast (b) a battery cell (c) a white flower (d) a mirror
36. 36.True or false: sugar dissolves in water. (a) False (b) True
37. 37.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “brightness of rainbow”? (a) we change it (b) we measure it (c) we keep it the same
38. 38.🔮 Predict: you shake oil and water hard in a closed bottle and wait. What happens? (a) they mix for ever (b) they turn to honey (c) they separate again (d) they become solid
39. 39.True or false: a balloon is not needed for the balloon rocket. (a) True (b) False
40. 40.🔮 Predict: you add two more paper clips. How does it fall? (a) slower (b) it stops in the air (c) faster (d) it floats up

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