Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 444 · 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.🔍 Sand is stirred into water. What do you see after a while? (a) it turns blue (b) it settles at the bottom (c) it floats up (d) it dissolves
2. 2.⚖️ 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 what we measure. (a) False (b) True
3. 3.🥄 Which of these does not dissolve in water? (a) chalk powder (b) baking soda (c) sugar (d) table salt
4. 4.🔍 Which is the odd one out? (a) a pebble (b) a coin (c) a ball of clay (d) an empty capped bottle
5. 5.💧 Which of these does not let water climb? (a) a piece of chalk (b) a paper towel (c) a plastic ruler (d) a flower stem
6. 6.True or false: a coin falls slowly through the air. (a) True (b) False
7. 7.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
8. 8.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a sink or a bucket (c) a glass of water (d) a battery cell
9. 9.🔍 Which is the odd one out? (a) an ice cube (b) a cork (c) a pebble (d) air
10. 10.🛟 Which of these sinks in water? (a) an ice cube (b) a coin (c) an empty capped bottle (d) a piece of thermocol
11. 11.🧺 Do we need safety scissors for the paper helicopter? (a) needed (b) not needed
12. 12.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) in the water layer (b) on top of the oil (c) under the honey (d) in the honey layer
13. 13.⚖️ 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
14. 14.🛟 Why should the glass of water stand on a steady, flat place? (a) so it does not fall (b) so it turns blue (c) so it gets hot (d) so the Sun moves
15. 15.🥄 Does sugar left unstirred dissolve faster or slower? (a) faster (b) slower
16. 16.🧺 Which of these is needed for the paper helicopter? (a) a mirror (b) a magnet (c) a strip of paper (d) a balloon
17. 17.🛟 Which rule keeps you safe when working with sunlight? (a) never look at the Sun (b) look at it in a mirror (c) look at it through glass (d) stare at the Sun
18. 18.🧺 Which of these is needed for the dissolving test? (a) warm water (b) a magnet (c) a balloon (d) cotton wool
19. 19.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is what we measure? (a) the tub of water (b) the kind of clay (c) whether it floats (d) the shape of the clay
20. 20.True or false: a balloon is needed for the dissolving test. (a) False (b) True
21. 21.🛟 Why should we wipe up spilled oil at once? (a) spilled oil is slippery (b) oil makes it rain (c) oil attracts magnets (d) oil turns into honey
22. 22.🛟 Why should you not over-blow the balloon? (a) it turns into a kite (b) it gets too heavy (c) it changes colour (d) it can pop loudly
23. 23.🔍 Which is the odd one out? (a) air (b) very salty water (c) an ice cube (d) cooking oil
24. 24.🍯 Which of these is less dense than water? (a) a glass marble (b) honey (c) very salty water (d) an ice cube
25. 25.🔍 Which is the odd one out? (a) a crumpled paper ball (b) a paper helicopter (c) a fluff of cotton (d) a feather
26. 26.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
27. 27.🔍 Which is the odd one out? (a) a toy parachute (b) a paper helicopter (c) a stone (d) a feather
28. 28.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same string”? (a) we keep it the same (b) we change it (c) we measure it
29. 29.🚁 Which of these falls fast through the air? (a) a toy parachute (b) a paper helicopter (c) a crumpled paper ball (d) a fluff of cotton
30. 30.💧 Why do water drops form on the outside of a glass of ice water? (a) ice escapes the glass (b) the glass leaks (c) the glass sweats (d) vapour in air cools
31. 31.🔍 Which is the odd one out? (a) a steel spoon (b) a coin (c) an open sheet of paper (d) a stone
32. 32.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) sunlight (b) water (c) cling film (d) a mirror
33. 33.🚀 Which of these goes backward? (a) the rocket (b) the swimmer (c) the balloon (d) water from the oars
34. 34.🎈 When does the balloon rocket stop? (a) when the air runs out (b) when it turns blue (c) it never stops (d) when it gets cold
35. 35.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the amount of colour”? (a) we change it (b) we keep it the same (c) we measure it
36. 36.🧺 Do we need a magnet for the float-or-sink test? (a) not needed (b) needed
37. 37.⚖️ 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 change it (c) we keep it the same
38. 38.🚁 Dropped from a raised hand, does an open sheet of paper fall slowly or fast? (a) falls fast (b) falls slowly
39. 39.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) cling film (b) sunlight (c) ice cubes (d) a battery cell
40. 40.🌈 In VIBGYOR, what number colour is indigo?

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