Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 335 · 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.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) turmeric powder (c) a magnet (d) a sink or a bucket
2. 2.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic pin holder (c) a drinking straw (d) a fridge magnet
3. 3.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
4. 4.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a sink or a bucket (c) a stiff postcard (d) a mirror
5. 5.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
6. 6.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) air pressure (b) magnetism
7. 7.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the way we turn it”? (a) we change it (b) we keep it the same (c) we measure it
8. 8.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a sink or a bucket (c) a stiff postcard (d) a mirror
9. 9.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to cool the glass (c) to grow plants (d) to catch any spills
10. 10.🔍 Which is the odd one out? (a) a fridge magnet (b) a medicine dropper (c) a drinking straw (d) a vacuum cleaner
11. 11.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
12. 12.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) air inside pushes back (c) water is hiding there (d) the cap is sticky
13. 13.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a magnetic pin holder (c) a bicycle pump (d) a suction hook
14. 14.True or false: a suction hook works by magnetism. (a) True (b) False
15. 15.True or false: a vacuum cleaner works by magnetism. (a) True (b) False
16. 16.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a stiff postcard (c) a magnet (d) a balloon
17. 17.🧺 Which of these is not needed for the card-on-a-glass trick? (a) yeast (b) a towel (c) a stiff postcard (d) a sink or a bucket
18. 18.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) little air left inside (c) it looks nicer (d) the card gets wet
19. 19.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
20. 20.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
21. 21.⚖️ 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
22. 22.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
23. 23.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a drinking straw (c) a suction hook (d) a compass needle
24. 24.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a vacuum cleaner (c) a drinking straw (d) a medicine dropper
25. 25.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a towel (c) a glass of water (d) a magnet
26. 26.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is heavier (c) it will not break (d) it is hotter
27. 27.True or false: yeast is not needed for the card-on-a-glass trick. (a) False (b) True
28. 28.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a battery cell (c) a glass of water (d) a sink or a bucket
29. 29.⚖️ 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
30. 30.⚖️ 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 same card (b) whether the card stays (c) how full the glass is (d) the way we turn it
31. 31.True or false: a mirror is needed for the card-on-a-glass trick. (a) True (b) False
32. 32.True or false: a bicycle pump works by air pressure. (a) True (b) False
33. 33.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) over a laptop (c) over a sink or bucket (d) near a plug point
34. 34.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic chess set (c) a suction hook (d) a fridge magnet
35. 35.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
36. 36.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
37. 37.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) False (b) True
38. 38.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a magnet (c) a glass of water (d) a battery cell
39. 39.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is the one thing we change? (a) the same glass (b) the same card (c) how full the glass is (d) whether the card stays
40. 40.⚖️ 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) how full the glass is (b) the same card (c) whether the card stays

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