Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 431 · 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.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) it sinks at once (b) colour climbs up it (c) it turns to plastic (d) nothing ever happens
2. 2.True or false: a mirror is not needed for the density tower. (a) False (b) True
3. 3.💧 Dip a flower stem into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
4. 4.💧 Which of these does not let water climb? (a) a flower stem (b) a cotton thread (c) a piece of foil (d) a sugar cube
5. 5.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same card”? (a) we change it (b) we keep it the same (c) we measure it
6. 6.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: the same three liquids is the one thing we change. (a) True (b) False
7. 7.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same string is kept the same. (a) False (b) True
8. 8.🔍 Which is the odd one out? (a) a sugar cube (b) a cotton thread (c) a strip of cloth (d) a glass marble
9. 9.🔍 Which is the odd one out? (a) sugar (b) glucose powder (c) table salt (d) chalk powder
10. 10.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is the one thing we change? (a) the kind of paper (b) the length of the blades (c) time to reach the floor (d) the paper clip
11. 11.🛟 Which is a safe rule for the balloon rocket? (a) put string round a neck (b) blow it till it bursts (c) keep it away from faces (d) aim it at your friend
12. 12.🧺 Which of these is not needed for the balloon rocket? (a) a drinking straw (b) a balloon (c) a battery cell (d) two chairs
13. 13.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “brightness of rainbow”? (a) we keep it the same (b) we change it (c) we measure it
14. 14.True or false: sugar is not needed for the dissolving test. (a) True (b) False
15. 15.🧺 Do we need a pencil for the paper helicopter? (a) needed (b) not needed
16. 16.True or false: a strip of cloth lets water climb up it. (a) True (b) False
17. 17.🧺 Do we need a towel for spills for the float-or-sink test? (a) needed (b) not needed
18. 18.🔮 What would change if the flower stood in plain water? (a) the petals turn red (b) no colour change (c) the stem turns blue (d) the flower glows
19. 19.🛟 Which rule keeps the density tower experiment safe? (a) do not lick the spoon (b) throw the glass (c) taste each layer (d) pour it on the floor
20. 20.💧 Which of these does not let water climb? (a) a flower stem (b) a rubber eraser (c) a strip of cloth (d) a sugar cube
21. 21.🥛 What holds the card up against the upside-down glass? (a) air pushing up (b) the cold water (c) a magnet (d) glue on the card
22. 22.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the kind of sugar is what we measure. (a) True (b) False
23. 23.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) cling film (b) turmeric powder (c) water (d) a big bowl
24. 24.🔍 Which is the odd one out? (a) a pebble (b) a glass marble (c) very salty water (d) air
25. 25.🌊 What pushes a floating cork upward? (a) the water (b) the tub (c) the air above (d) the cork itself
26. 26.🥄 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
27. 27.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) False (b) True
28. 28.True or false: a few hours of waiting is not needed for the coloured flower experiment. (a) True (b) False
29. 29.True or false: a balloon is needed for the water cycle bowl. (a) True (b) False
30. 30.True or false: a battery cell is needed for the balloon rocket. (a) True (b) False
31. 31.🍯 Which of these is denser than water? (a) a cork (b) air (c) a pebble (d) cooking oil
32. 32.💧 Which of these is evaporation? (a) a misty bathroom mirror (b) sweat drying on skin (c) drops under a pot lid (d) ice becoming water
33. 33.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: how big we blow it is kept the same. (a) True (b) False
34. 34.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is the one thing we change? (a) the same glass (b) the time of day (c) the same window (d) the amount of water
35. 35.🔍 Which is the odd one out? (a) a magnetic chess set (b) a drinking straw (c) a medicine dropper (d) a bicycle pump
36. 36.🛟 Who should pour the warm water in the dissolving test? (a) a grown-up (b) a friend who is running (c) nobody needs to (d) the youngest child
37. 37.🔍 Which is the odd one out? (a) a paper towel (b) a sugar cube (c) a plastic ruler (d) a flower stem
38. 38.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) a balloon (c) bright sunlight (d) a sheet of white paper
39. 39.💧 Which of these lets water climb up it? (a) a steel spoon (b) a cotton thread (c) a plastic ruler (d) a rubber eraser
40. 40.True or false: sunlight is not needed for the water cycle bowl. (a) False (b) True

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