Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 822 · 40 questions

What you do (Air pushes): 1. Fill a plastic glass right to the top with water. 2. Lay the postcard flat on top, covering the rim. 3. Over a sink or bucket, hold the card and turn the glass upside down. 4. Slowly take your hand away from the card and watch.

1. 1.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
2. 2.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a stiff postcard (c) a battery cell (d) a sink or a bucket
3. 3.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) False (b) True
4. 4.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
5. 5.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
6. 6.🥛 Why is it best to fill the glass right to the top? (a) little air left inside (b) the card gets wet (c) water is heavier (d) it looks nicer
7. 7.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is kept the same. (a) False (b) True
8. 8.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) over a sink or bucket (c) on a bed (d) near a plug point
9. 9.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a glass of water (c) a sink or a bucket (d) a magnet
10. 10.🔍 Which is the odd one out? (a) a bicycle pump (b) a drinking straw (c) a suction hook (d) a magnetic pin holder
11. 11.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is heavier (c) it is magnetic (d) it is hotter
12. 12.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a sink or a bucket (c) turmeric powder (d) a glass of water
13. 13.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to grow plants (c) to cool the glass (d) to catch any spills
14. 14.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is what we measure? (a) the way we turn it (b) whether the card stays (c) how full the glass is (d) the same glass
15. 15.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) air pressure (b) magnetism
16. 16.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
17. 17.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) magnetism (b) air pressure
18. 18.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
19. 19.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a sink or a bucket (c) a glass of water (d) a battery cell
20. 20.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
21. 21.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a stiff postcard (c) a balloon (d) a towel
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 glass of water (c) a towel (d) a mirror
23. 23.🥛 Does a compass needle work by air pressure or by magnetism? (a) magnetism (b) air pressure
24. 24.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) yeast (c) a stiff postcard (d) a glass of water
25. 25.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) a magnet (c) air pushing up (d) the cold water
26. 26.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a compass needle (c) a fridge magnet (d) a drinking straw
27. 27.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic pin holder (c) a vacuum cleaner (d) a magnetic chess set
28. 28.⚖️ 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) False (b) True
29. 29.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) True (b) False
30. 30.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a compass needle (c) a suction hook (d) a magnetic pin holder
31. 31.True or false: a magnetic pin holder works by magnetism. (a) False (b) True
32. 32.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) the cap is sticky (c) the bottle is magnetic (d) air inside pushes back
33. 33.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) False (b) True
34. 34.🔍 Which is the odd one out? (a) a fridge magnet (b) a magnetic pin holder (c) a bicycle pump (d) a compass needle
35. 35.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) turmeric powder (c) a balloon (d) a sink or a bucket
36. 36.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
37. 37.🔍 Which is the odd one out? (a) a magnetic chess set (b) a medicine dropper (c) a vacuum cleaner (d) a suction hook
38. 38.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is the one thing we change. (a) False (b) True
39. 39.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
40. 40.True or false: a compass needle works by magnetism. (a) False (b) True

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