Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 597 · 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) baking soda (b) glucose powder (c) small pebbles (d) sugar
2. 2.🍯 Is a pebble denser or less dense than water? (a) denser than water (b) less dense than water
3. 3.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “time to reach the floor”? (a) we keep it the same (b) we measure it (c) we change it
4. 4.🔍 Which is the odd one out? (a) a suction hook (b) a magnetic chess set (c) a bicycle pump (d) a medicine dropper
5. 5.⚖️ 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
6. 6.True or false: sand does not dissolve in water. (a) False (b) True
7. 7.⚖️ 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
8. 8.🛟 Which rule keeps the density tower experiment safe? (a) pour it on the floor (b) throw the glass (c) do not lick the spoon (d) taste each layer
9. 9.🔍 Which is the odd one out? (a) baking soda (b) sand (c) food colour (d) sugar
10. 10.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “time for colour to show”? (a) we keep it the same (b) we measure it (c) we change it
11. 11.🛟 Does an empty capped bottle float or sink in water? (a) sinks (b) floats
12. 12.🌈 How many colours do we name in a rainbow (VIBGYOR)?
13. 13.🧺 Do we need yeast for the coloured flower experiment? (a) needed (b) not needed
14. 14.🧺 Which of these is needed for the coloured flower experiment? (a) a mirror (b) a white flower (c) a magnet (d) turmeric powder
15. 15.True or false: a balloon is needed for the paper helicopter. (a) True (b) False
16. 16.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the slope of the string is kept the same. (a) True (b) False
17. 17.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a stiff postcard (c) a towel (d) yeast
18. 18.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a tub of water (b) a results table (c) a battery cell (d) small test objects
19. 19.🧺 Which of these is not needed for the paper helicopter? (a) a strip of paper (b) a balloon (c) a pencil (d) safety scissors
20. 20.🛟 Where should you do the card-and-glass trick? (a) over a sink or bucket (b) near a plug point (c) over a laptop (d) on a bed
21. 21.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is magnetic (c) it is heavier (d) it will not break
22. 22.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the kind of clay”? (a) we keep it the same (b) we change it (c) we measure it
23. 23.🧺 Which of these is not needed for the dissolving test? (a) cotton wool (b) warm water (c) cold water (d) two clear glasses
24. 24.🔍 Which is the odd one out? (a) a crumpled paper ball (b) a steel spoon (c) a stone (d) a toy parachute
25. 25.🧺 Which of these is needed for the water rainbow? (a) turmeric powder (b) a balloon (c) a clear glass of water (d) yeast
26. 26.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the slope of the string is the one thing we change. (a) True (b) False
27. 27.🛟 Why should we wipe up spilled oil at once? (a) oil turns into honey (b) spilled oil is slippery (c) oil makes it rain (d) oil attracts magnets
28. 28.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the shape of the clay is the one thing we change. (a) True (b) False
29. 29.⚖️ 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) the same glass (c) the same card (d) how full the glass is
30. 30.🚢 Why can a heavy steel ship float on the sea? (a) sea water is warm (b) its hollow shape (c) steel is very light (d) it has a magnet
31. 31.💧 In the covered bowl, where does the water vapour come from? (a) the cling film (b) the air outside (c) water warmed by the Sun (d) the bowl itself
32. 32.True or false: yeast is not needed for the coloured flower experiment. (a) False (b) True
33. 33.🚀 Which of these goes backward? (a) water from the oars (b) the rowing boat (c) the swimmer (d) the balloon
34. 34.🛟 Who should trim the flower stem? (a) a pet (b) a grown-up (c) anyone, without looking (d) a toddler
35. 35.True or false: a ruler is not needed for the paper helicopter. (a) False (b) True
36. 36.True or false: sugar stirred well dissolves faster. (a) False (b) True
37. 37.🥄 Does sugar in warm water dissolve faster or slower? (a) faster (b) slower
38. 38.True or false: sugar left unstirred dissolves slower. (a) False (b) True
39. 39.🧺 Which of these is not needed for the water cycle bowl? (a) a magnet (b) ice cubes (c) sunlight (d) a big bowl
40. 40.True or false: a sheet of white paper is not needed for the water rainbow. (a) False (b) True

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