Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 105 · 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.🥛 Does a compass needle work by air pressure or by magnetism? (a) magnetism (b) air pressure
2. 2.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: time to reach the floor is kept the same. (a) False (b) True
3. 3.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is what we measure? (a) how big we blow it (b) the slope of the string (c) distance it travels (d) the same string
4. 4.💧 In the covered bowl, where does the water vapour come from? (a) water warmed by the Sun (b) the bowl itself (c) the air outside (d) the cling film
5. 5.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is the one thing we change? (a) the drop height (b) time to reach the floor (c) the length of the blades (d) the kind of paper
6. 6.True or false: cooking oil is denser than water. (a) False (b) True
7. 7.💧 Dip a sugar cube into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
8. 8.🧺 Which of these is needed for the coloured flower experiment? (a) turmeric powder (b) yeast (c) a battery cell (d) a few hours of waiting
9. 9.True or false: a battery cell is needed for the water rainbow. (a) True (b) False
10. 10.🍯 Is a glass marble denser or less dense than water? (a) denser than water (b) less dense than water
11. 11.🚁 Which of these falls slowly through the air? (a) a stone (b) a crumpled paper ball (c) a glass marble (d) a feather
12. 12.🧺 Which of these is not needed for the density tower? (a) a spoon (b) a mirror (c) water with food colour (d) cooking oil
13. 13.⚖️ 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 measure it (b) we change it (c) we keep it the same
14. 14.⚖️ 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 same three liquids (b) the same glass (c) the order of the layers (d) the order of pouring
15. 15.🧺 Which of these is needed for the density tower? (a) water with food colour (b) turmeric powder (c) a balloon (d) a magnet
16. 16.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) it sinks at once (b) it turns to plastic (c) colour climbs up it (d) nothing ever happens
17. 17.🍯 Which of these is denser than water? (a) a ping-pong ball (b) a coin (c) a cork (d) an ice cube
18. 18.🛟 Why should the glass of water stand on a steady, flat place? (a) so it gets hot (b) so it turns blue (c) so it does not fall (d) so the Sun moves
19. 19.🧺 Do we need cotton wool for the dissolving test? (a) needed (b) not needed
20. 20.True or false: safety scissors is not needed for the paper helicopter. (a) True (b) False
21. 21.💧 Which change is this: a puddle drying up? (a) melting (b) freezing (c) condensation (d) evaporation
22. 22.🧺 Do we need sugar for the dissolving test? (a) not needed (b) needed
23. 23.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
24. 24.🔍 Which is the odd one out? (a) a cork (b) a piece of thermocol (c) a ping-pong ball (d) a ball of clay
25. 25.🧺 Which of these is not needed for the density tower? (a) a tall clear glass (b) a spoon (c) yeast (d) cooking oil
26. 26.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to catch any spills (c) to make it rain (d) to cool the glass
27. 27.🌈 How many colours do we name in a rainbow (VIBGYOR)?
28. 28.🔍 Which is the odd one out? (a) a medicine dropper (b) a drinking straw (c) a suction hook (d) a fridge magnet
29. 29.True or false: warm water is not needed for the dissolving test. (a) True (b) False
30. 30.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is the one thing we change? (a) how big we blow it (b) the same string (c) distance it travels (d) the slope of the string
31. 31.🛟 Which of these floats on water? (a) an ice cube (b) a coin (c) a pebble (d) a metal key
32. 32.🔮 Predict: which dissolves faster — a sugar cube or the same amount of powdered sugar? (a) both the same (b) powdered sugar (c) neither of them (d) the sugar cube
33. 33.🥄 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
34. 34.🧺 Do we need a few hours of waiting for the coloured flower experiment? (a) not needed (b) needed
35. 35.🧺 Which of these is not needed for the float-or-sink test? (a) small test objects (b) a results table (c) a tub of water (d) yeast
36. 36.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “time to dissolve”? (a) we measure it (b) we change it (c) we keep it the same
37. 37.True or false: a sugar cube lets water climb up it. (a) True (b) False
38. 38.🧺 Which of these is needed for the balloon rocket? (a) turmeric powder (b) a mirror (c) yeast (d) a drinking straw
39. 39.🔍 Which is the odd one out? (a) a cotton thread (b) a piece of chalk (c) a piece of foil (d) a paper towel
40. 40.🥄 Which of these dissolves faster? (a) sugar in icy water (b) powdered sugar (c) sugar left unstirred (d) a big sugar cube

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