Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 738 · 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.🔍 What do you see a day after a white flower stands in blue water? (a) the flower floats away (b) the petals turn bluish (c) the stem turns to ice (d) the water turns green
2. 2.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is the one thing we change? (a) the tub of water (b) the kind of clay (c) the shape of the clay (d) whether it floats
3. 3.🧺 Which of these is needed for the float-or-sink test? (a) a tub of water (b) a battery cell (c) turmeric powder (d) a mirror
4. 4.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
5. 5.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
6. 6.🧺 Do we need cotton wool for the dissolving test? (a) not needed (b) needed
7. 7.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is the one thing we change? (a) the order of pouring (b) the same glass (c) the same three liquids (d) the order of the layers
8. 8.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the paper clip is what we measure. (a) True (b) False
9. 9.True or false: wet hair drying is condensation. (a) False (b) True
10. 10.True or false: a cork is less dense than water. (a) False (b) True
11. 11.🔍 Which is the odd one out? (a) an ice cube (b) a pebble (c) a coin (d) a steel spoon
12. 12.🧺 Which of these is not needed for the coloured flower experiment? (a) a white flower (b) food colour (c) a battery cell (d) a few hours of waiting
13. 13.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is what we measure? (a) the same tape (b) the slope of the string (c) distance it travels (d) how big we blow it
14. 14.🧺 Which of these is not needed for the density tower? (a) a mirror (b) a tall clear glass (c) cooking oil (d) honey
15. 15.🔮 Predict: a bowl of water is left uncovered in the hot sun all day. What happens? (a) some water evaporates (b) the water increases (c) it turns to ice (d) it turns to salt
16. 16.🔮 Predict: you fold the two blades the other way. What changes? (a) it does not fall (b) it turns blue (c) it spins the other way (d) it falls upward
17. 17.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a glass of water (c) a stiff postcard (d) turmeric powder
18. 18.⚖️ 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 change it (b) we measure it (c) we keep it the same
19. 19.🔮 Predict: the string slopes uphill. What happens? (a) it travels less far (b) it goes backward first (c) it travels farther (d) it speeds up
20. 20.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is the one thing we change? (a) the length of the blades (b) the drop height (c) the kind of paper (d) time to reach the floor
21. 21.🔍 Sand is stirred into water. What do you see after a while? (a) it floats up (b) it dissolves (c) it turns blue (d) it settles at the bottom
22. 22.True or false: two chairs is needed for the balloon rocket. (a) False (b) True
23. 23.🔍 Which is the odd one out? (a) a piece of foil (b) a steel spoon (c) a plastic ruler (d) a sugar cube
24. 24.⚖️ 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 pouring”? (a) we keep it the same (b) we measure it (c) we change it
25. 25.🧺 Which of these is not needed for the float-or-sink test? (a) a results table (b) a towel for spills (c) a tub of water (d) yeast
26. 26.True or false: an open sheet of paper falls fast through the air. (a) True (b) False
27. 27.💧 Which of these lets water climb up it? (a) a cotton thread (b) a glass marble (c) a rubber eraser (d) a steel spoon
28. 28.True or false: sugar stirred well dissolves faster. (a) True (b) False
29. 29.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) small test objects (b) a results table (c) yeast (d) a towel for spills
30. 30.⚖️ 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 the one thing we change. (a) False (b) True
31. 31.🧺 Which of these is needed for the balloon rocket? (a) a mirror (b) yeast (c) a magnet (d) a balloon
32. 32.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the amount of water”? (a) we change it (b) we measure it (c) we keep it the same
33. 33.🍯 Which of these is less dense than water? (a) a pebble (b) very salty water (c) honey (d) a cork
34. 34.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns brighter (b) it turns all red (c) the rainbow fades (d) it floats away
35. 35.🧺 Do we need a sheet of white paper for the water rainbow? (a) needed (b) not needed
36. 36.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the amount of water is kept the same. (a) False (b) True
37. 37.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
38. 38.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same glass is kept the same. (a) True (b) False
39. 39.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the water temperature”? (a) we measure it (b) we keep it the same (c) we change it
40. 40.🛟 Which is the safe way to do the float-or-sink test? (a) leave water on the floor (b) run around the tub (c) wipe up spills at once (d) play near a deep pond

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