Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 349 · 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.🍯 Is a coin denser or less dense than water? (a) less dense than water (b) denser than water
2. 2.🧺 Do we need a magnet for the coloured flower experiment? (a) needed (b) not needed
3. 3.🧺 Which of these is not needed for the coloured flower experiment? (a) a few hours of waiting (b) food colour (c) yeast (d) a glass of water
4. 4.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is what we measure? (a) the amount of water (b) the kind of sugar (c) the stirring (d) time to dissolve
5. 5.True or false: bright sunlight is not needed for the water rainbow. (a) False (b) True
6. 6.💧 Which of these is freezing? (a) drops on a cold glass (b) a misty bathroom mirror (c) a puddle drying up (d) a pond icing over
7. 7.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is kept the same? (a) time to dissolve (b) the amount of water (c) the water temperature
8. 8.True or false: a results table is not needed for the float-or-sink test. (a) True (b) False
9. 9.🛟 Why should we wipe up spilled oil at once? (a) spilled oil is slippery (b) oil turns into honey (c) oil makes it rain (d) oil attracts magnets
10. 10.🔍 Which is the odd one out? (a) a suction hook (b) a magnetic pin holder (c) a magnetic chess set (d) a fridge magnet
11. 11.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the kind of paper”? (a) we keep it the same (b) we change it (c) we measure it
12. 12.🧺 Which of these is needed for the density tower? (a) a magnet (b) a balloon (c) a mirror (d) water with food colour
13. 13.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: how full the glass is is what we measure. (a) True (b) False
14. 14.🔮 Predict: an empty capped bottle floats. What happens if you fill it with sand? (a) it turns blue (b) it sinks (c) it floats higher (d) it melts
15. 15.True or false: a balloon is not needed for the card-on-a-glass trick. (a) True (b) False
16. 16.🚀 Which of these goes backward? (a) the rocket (b) the balloon (c) gas from the rocket (d) the swimmer
17. 17.True or false: a cotton thread lets water climb up it. (a) False (b) True
18. 18.🌈 In VIBGYOR, what number colour is orange?
19. 19.True or false: a flower stem does not let water climb. (a) True (b) False
20. 20.🔍 Which layer is on top in the honey-water-oil tower? (a) cooking oil (b) honey (c) the spoon (d) coloured water
21. 21.True or false: a mirror is not needed for the water cycle bowl. (a) False (b) True
22. 22.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is what we measure? (a) the length of the stem (b) the room it stands in (c) the kind of flower (d) time for colour to show
23. 23.🧺 Which of these is needed for the float-or-sink test? (a) turmeric powder (b) a magnet (c) a battery cell (d) a tub of water
24. 24.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the length of the blades is kept the same. (a) True (b) False
25. 25.True or false: a drinking straw works by air pressure. (a) True (b) False
26. 26.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: how big we blow it is what we measure. (a) False (b) True
27. 27.💧 Which of these does not let water climb? (a) a sugar cube (b) a strip of cloth (c) a plastic ruler (d) a paper towel
28. 28.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) clouds (b) balloons (c) magnets (d) prisms
29. 29.🚁 Dropped from a raised hand, does a feather fall slowly or fast? (a) falls slowly (b) falls fast
30. 30.🧺 Do we need cold water for the dissolving test? (a) not needed (b) needed
31. 31.True or false: a big sugar cube dissolves slower. (a) False (b) True
32. 32.True or false: a pencil is not needed for the paper helicopter. (a) False (b) True
33. 33.🧺 Which of these is needed for the coloured flower experiment? (a) a balloon (b) food colour (c) a magnet (d) yeast
34. 34.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: brightness of rainbow is what we measure. (a) True (b) False
35. 35.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: how much of each liquid is kept the same. (a) True (b) False
36. 36.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the amount of water is what we measure. (a) True (b) False
37. 37.True or false: a steel spoon lets water climb up it. (a) False (b) True
38. 38.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the amount of clay is what we measure. (a) True (b) False
39. 39.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) a clock or timer (b) a teaspoon (c) a mirror (d) two clear glasses
40. 40.🥚 A fresh egg sinks in plain water. What makes it float? (a) lots of salt stirred in (b) a few ice cubes (c) a little shaking (d) more plain water

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