Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 345 · 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) a stiff postcard (c) a battery cell (d) a magnet
2. 2.🥛 Which of these works by magnetism? (a) a magnetic pin holder (b) a drinking straw (c) a bicycle pump (d) a medicine dropper
3. 3.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a sink or a bucket (c) a glass of water (d) turmeric powder
4. 4.True or false: a medicine dropper works by magnetism. (a) True (b) False
5. 5.🧺 Which of these is needed for the card-on-a-glass trick? (a) a glass of water (b) a battery cell (c) turmeric powder (d) a magnet
6. 6.🧺 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 mirror (d) a stiff postcard
7. 7.True or false: a fridge magnet works by air pressure. (a) True (b) False
8. 8.True or false: yeast is not needed for the card-on-a-glass trick. (a) True (b) False
9. 9.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
10. 10.True or false: a towel is not needed for the card-on-a-glass trick. (a) True (b) False
11. 11.⚖️ 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) the same card (b) whether the card stays (c) how full the glass is
12. 12.True or false: a compass needle works by magnetism. (a) True (b) False
13. 13.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a battery cell (c) a towel (d) a magnet
14. 14.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a balloon (b) a towel (c) a glass of water (d) a sink or a bucket
15. 15.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
16. 16.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) air inside pushes back (c) the cap is sticky (d) the bottle is magnetic
17. 17.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) on a bed (c) over a sink or bucket (d) near a plug point
18. 18.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “how full the glass is”? (a) we measure it (b) we change it (c) we keep it the same
19. 19.⚖️ 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) how full the glass is (b) the same glass (c) the same card (d) whether the card stays
20. 20.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
21. 21.🔍 Which is the odd one out? (a) a medicine dropper (b) a vacuum cleaner (c) a drinking straw (d) a magnetic pin holder
22. 22.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) yeast (c) a magnet (d) a sink or a bucket
23. 23.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a compass needle (c) a magnetic chess set (d) a drinking straw
24. 24.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a stiff postcard (c) a sink or a bucket (d) a mirror
25. 25.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
26. 26.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card flies away (b) the glass breaks (c) the water turns to ice (d) the card stays on
27. 27.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same glass”? (a) we keep it the same (b) we measure it (c) we change it
28. 28.True or false: yeast is needed for the card-on-a-glass trick. (a) False (b) True
29. 29.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is what we measure. (a) True (b) False
30. 30.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a fridge magnet (c) a magnetic chess set (d) a bicycle pump
31. 31.True or false: a battery cell is needed for the card-on-a-glass trick. (a) False (b) True
32. 32.🔍 Which is the odd one out? (a) a drinking straw (b) a compass needle (c) a medicine dropper (d) a bicycle pump
33. 33.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
34. 34.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
35. 35.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is heavier (c) it is magnetic (d) it will not break
36. 36.🥛 Why is it best to fill the glass right to the top? (a) little air left inside (b) water is heavier (c) it looks nicer (d) the card gets wet
37. 37.🥛 Which of these works by magnetism? (a) a fridge magnet (b) a medicine dropper (c) a vacuum cleaner (d) a drinking straw
38. 38.True or false: a balloon is not needed for the card-on-a-glass trick. (a) False (b) True
39. 39.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) air pressure (b) magnetism
40. 40.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to catch any spills (c) to cool the glass (d) to make it rain

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