Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 407 · 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.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the amount of colour is the one thing we change. (a) True (b) False
2. 2.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: distance it travels is the one thing we change. (a) True (b) False
3. 3.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
4. 4.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: whether the card stays is the one thing we change. (a) True (b) False
5. 5.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the stirring is what we measure. (a) False (b) True
6. 6.True or false: a drinking straw is not needed for the balloon rocket. (a) False (b) True
7. 7.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is the one thing we change? (a) the same string (b) the slope of the string (c) how big we blow it (d) the same straw
8. 8.🥄 Which of these does not dissolve in water? (a) small pebbles (b) baking soda (c) glucose powder (d) sugar
9. 9.🍯 Is a glass marble denser or less dense than water? (a) denser than water (b) less dense than water
10. 10.True or false: a ruler is needed for the paper helicopter. (a) False (b) True
11. 11.🛟 Does a dry leaf float or sink in water? (a) sinks (b) floats
12. 12.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: whether the card stays is what we measure. (a) False (b) True
13. 13.True or false: a cotton thread lets water climb up it. (a) True (b) False
14. 14.🧺 Do we need a magnet for the density tower? (a) not needed (b) needed
15. 15.🔍 Which is the odd one out? (a) a dry leaf (b) a ball of clay (c) an ice cube (d) a piece of thermocol
16. 16.🌈 How many colours do we name in a rainbow (VIBGYOR)?
17. 17.True or false: a mirror is needed for the float-or-sink test. (a) False (b) True
18. 18.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the amount of water”? (a) we keep it the same (b) we measure it (c) we change it
19. 19.⚖️ 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) how full the glass is (c) the way we turn it
20. 20.🔮 Predict: an empty capped bottle floats. What happens if you fill it with sand? (a) it floats higher (b) it melts (c) it turns blue (d) it sinks
21. 21.True or false: the rowing boat goes backward. (a) True (b) False
22. 22.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a sink or a bucket (b) a battery cell (c) a stiff postcard (d) a glass of water
23. 23.📘 Every push has an equal push in the opposite direction. Which toy shows this? (a) a sundial (b) a mirror (c) a balloon rocket (d) a fridge magnet
24. 24.True or false: a dry leaf floats on water. (a) False (b) True
25. 25.🛟 Why should only a grown-up handle any hot water? (a) hot water is heavy (b) it changes colour (c) hot water can scald (d) hot water is magnetic
26. 26.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a pencil (b) safety scissors (c) a paper clip (d) a balloon
27. 27.🧺 Do we need a battery cell for the density tower? (a) not needed (b) needed
28. 28.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) a clock or timer (b) a balloon (c) a teaspoon (d) sugar
29. 29.🍯 Is a ping-pong ball denser or less dense than water? (a) less dense than water (b) denser than water
30. 30.🛟 Who should pour the warm water in the dissolving test? (a) a grown-up (b) the youngest child (c) a friend who is running (d) nobody needs to
31. 31.🧺 Do we need a balloon for the density tower? (a) not needed (b) needed
32. 32.🥛 Which of these works by magnetism? (a) a fridge magnet (b) a vacuum cleaner (c) a bicycle pump (d) a drinking straw
33. 33.🧺 Which of these is needed for the float-or-sink test? (a) a magnet (b) a battery cell (c) turmeric powder (d) a tub of water
34. 34.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) violet (b) blue (c) green (d) red
35. 35.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the way we turn it is the one thing we change. (a) True (b) False
36. 36.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the tub of water”? (a) we change it (b) we keep it the same (c) we measure it
37. 37.True or false: yeast is needed for the density tower. (a) False (b) True
38. 38.🌊 What pushes a floating cork upward? (a) the tub (b) the cork itself (c) the water (d) the air above
39. 39.🔮 Predict: you fold the two blades the other way. What changes? (a) it spins the other way (b) it turns blue (c) it falls upward (d) it does not fall
40. 40.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is what we measure? (a) sun or shade (b) the time we wait (c) how many drops form (d) the amount of water

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