Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 334 · 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 not needed for the density tower? (a) cooking oil (b) water with food colour (c) turmeric powder (d) honey
2. 2.🛟 Why should we wipe up spilled oil at once? (a) spilled oil is slippery (b) oil turns into honey (c) oil attracts magnets (d) oil makes it rain
3. 3.🧺 Do we need a mirror for the density tower? (a) needed (b) not needed
4. 4.True or false: turmeric powder is needed for the coloured flower experiment. (a) False (b) True
5. 5.🚀 In “push back, move forward”, which way does the balloon go? (a) goes backward (b) goes forward
6. 6.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? What do we do with “the order of the layers”? (a) we keep it the same (b) we change it (c) we measure it
7. 7.True or false: honey is denser than water. (a) True (b) False
8. 8.True or false: a towel for spills is needed for the float-or-sink test. (a) False (b) True
9. 9.🎈 What is the job of the straw on the string? (a) it makes it heavier (b) it blows air in (c) it guides the balloon (d) it holds water
10. 10.🧺 Do we need a battery cell for the water rainbow? (a) needed (b) not needed
11. 11.🔍 Which is the odd one out? (a) a crumpled paper ball (b) a steel spoon (c) a glass marble (d) a fluff of cotton
12. 12.True or false: a battery cell is needed for the float-or-sink test. (a) False (b) True
13. 13.🔮 Predict: wet clothes are hung out on a sunny, windy day. How do they dry? (a) slower (b) they never dry (c) they turn to ice (d) faster
14. 14.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
15. 15.🧺 Do we need sugar for the dissolving test? (a) not needed (b) needed
16. 16.⚖️ 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 keep it the same (c) we measure it
17. 17.🛟 Which rule keeps the density tower experiment safe? (a) taste each layer (b) throw the glass (c) pour it on the floor (d) do not lick the spoon
18. 18.🧺 Which of these is needed for the paper helicopter? (a) a balloon (b) yeast (c) a magnet (d) safety scissors
19. 19.🛟 Does an iron nail float or sink in water? (a) sinks (b) floats
20. 20.💧 Dip a sugar cube into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
21. 21.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the amount of sugar is kept the same. (a) True (b) False
22. 22.🍯 Which of these is denser than water? (a) cooking oil (b) a cork (c) a ping-pong ball (d) a coin
23. 23.True or false: yeast is not needed for the density tower. (a) False (b) True
24. 24.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to win a prize (b) to splash everyone (c) to hide the corks (d) to keep children safe
25. 25.🧺 Do we need food colour for the coloured flower experiment? (a) needed (b) not needed
26. 26.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is kept the same? (a) sun or shade (b) the size of the bowl (c) how many drops form
27. 27.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a white flower (b) a glass of water (c) a balloon (d) a few hours of waiting
28. 28.🧺 Which of these is needed for the water cycle bowl? (a) a battery cell (b) yeast (c) a magnet (d) ice cubes
29. 29.🧺 Which of these is not needed for the water cycle bowl? (a) a balloon (b) water (c) sunlight (d) cling film
30. 30.True or false: sugar does not dissolve in water. (a) True (b) False
31. 31.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? What do we do with “the same glass”? (a) we measure it (b) we change it (c) we keep it the same
32. 32.⚖️ 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
33. 33.🌈 How many colours do we name in a rainbow (VIBGYOR)?
34. 34.🍯 Is air denser or less dense than water? (a) denser than water (b) less dense than water
35. 35.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) magnets (b) balloons (c) clouds (d) prisms
36. 36.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a glass of water (b) a battery cell (c) food colour (d) a white flower
37. 37.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is the one thing we change? (a) the kind of flower (b) the amount of water (c) the length of the stem (d) time for colour to show
38. 38.🔮 Predict: a stem is split in two, one half in red water and one in blue. What do the petals do? (a) they all turn green (b) they stay white (c) they fall off at once (d) they turn two colours
39. 39.True or false: a glass marble falls slowly through the air. (a) False (b) True
40. 40.🧺 Do we need safety scissors for the paper helicopter? (a) needed (b) not needed

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