Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 26 · 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 needed for the float-or-sink test? (a) a battery cell (b) yeast (c) a magnet (d) a tub of water
2. 2.True or false: a pebble floats on water. (a) True (b) False
3. 3.🧺 Which of these is not needed for the dissolving test? (a) cold water (b) sugar (c) a clock or timer (d) a mirror
4. 4.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: the size of the bowl is kept the same. (a) False (b) True
5. 5.🚀 Which of these goes backward? (a) the swimmer (b) the rocket (c) the rowing boat (d) water from the oars
6. 6.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is kept the same? (a) the length of the blades (b) the drop height (c) time to reach the floor
7. 7.🧺 Do we need food colour for the coloured flower experiment? (a) needed (b) not needed
8. 8.🧺 Which of these is not needed for the float-or-sink test? (a) a towel for spills (b) a tub of water (c) a results table (d) a battery cell
9. 9.🚀 In “push back, move forward”, which way does the rocket go? (a) goes forward (b) goes backward
10. 10.🚁 Which of these falls fast through the air? (a) a crumpled paper ball (b) a feather (c) an open sheet of paper (d) a paper helicopter
11. 11.🛟 Which of these floats on water? (a) a glass marble (b) a pebble (c) a ball of clay (d) an ice cube
12. 12.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: time to dissolve is what we measure. (a) False (b) True
13. 13.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the length of the stem”? (a) we keep it the same (b) we measure it (c) we change it
14. 14.True or false: a magnet is needed for the balloon rocket. (a) False (b) True
15. 15.📘 What does “dense” mean? (a) very thin (b) very colourful (c) heavy for its size (d) very hot
16. 16.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: the size of the bowl is what we measure. (a) False (b) True
17. 17.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the slope of the string”? (a) we keep it the same (b) we change it (c) we measure it
18. 18.🔍 Which is the odd one out? (a) a coin (b) an open sheet of paper (c) a glass marble (d) a steel spoon
19. 19.🥄 Which of these dissolves faster? (a) a big sugar cube (b) sugar in icy water (c) sugar left unstirred (d) sugar stirred well
20. 20.🧺 Do we need a white flower for the coloured flower experiment? (a) needed (b) not needed
21. 21.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is kept the same? (a) whether the card stays (b) the same glass (c) how full the glass is
22. 22.🧺 Which of these is not needed for the balloon rocket? (a) turmeric powder (b) a balloon (c) sticky tape (d) a long string
23. 23.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
24. 24.True or false: air is denser than water. (a) False (b) True
25. 25.🧺 Do we need a towel for spills for the float-or-sink test? (a) not needed (b) needed
26. 26.⚖️ 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 measure it (b) we keep it the same (c) we change it
27. 27.🚁 What does the paper helicopter do as it falls? (a) it spins round (b) it turns into a ball (c) it flies upward (d) it stays still in air
28. 28.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) nothing ever happens (b) colour climbs up it (c) it turns to plastic (d) it sinks at once
29. 29.🚁 Dropped from a raised hand, does a fluff of cotton fall slowly or fast? (a) falls slowly (b) falls fast
30. 30.🔍 Which is the odd one out? (a) a glass marble (b) a pebble (c) an ice cube (d) very salty water
31. 31.True or false: yeast is needed for the density tower. (a) False (b) True
32. 32.🛟 Which is the safe way to do the float-or-sink test? (a) leave water on the floor (b) wipe up spills at once (c) run around the tub (d) play near a deep pond
33. 33.🧺 Do we need bright sunlight for the water rainbow? (a) not needed (b) needed
34. 34.🧺 Which of these is not needed for the balloon rocket? (a) two chairs (b) vinegar (c) a long string (d) sticky tape
35. 35.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) cling film (b) a small cup (c) ice cubes (d) turmeric powder
36. 36.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) cooking oil (b) a balloon (c) a spoon (d) a tall clear glass
37. 37.🧺 Do we need a drinking straw for the balloon rocket? (a) not needed (b) needed
38. 38.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same string is what we measure. (a) True (b) False
39. 39.🧺 Do we need two chairs for the balloon rocket? (a) needed (b) not needed
40. 40.True or false: cooking oil is denser than water. (a) True (b) False

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