Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 739 · 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.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
2. 2.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) the cap is sticky (c) water is hiding there (d) air inside pushes back
3. 3.⚖️ 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
4. 4.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to grow plants (c) to make it rain (d) to catch any spills
5. 5.⚖️ 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) how full the glass is (c) the same glass (d) whether the card stays
6. 6.True or false: a drinking straw works by air pressure. (a) False (b) True
7. 7.⚖️ 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 kept the same. (a) False (b) True
8. 8.⚖️ 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) the way we turn it (c) how full the glass is
9. 9.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a drinking straw (c) a bicycle pump (d) a vacuum cleaner
10. 10.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
11. 11.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a balloon (b) a sink or a bucket (c) a stiff postcard (d) a towel
12. 12.🔍 Which is the odd one out? (a) a compass needle (b) a medicine dropper (c) a fridge magnet (d) a magnetic pin holder
13. 13.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
14. 14.True or false: a bicycle pump works by air pressure. (a) False (b) True
15. 15.True or false: a medicine dropper works by magnetism. (a) True (b) False
16. 16.True or false: a suction hook works by magnetism. (a) True (b) False
17. 17.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
18. 18.⚖️ 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
19. 19.🔍 Which is the odd one out? (a) a drinking straw (b) a suction hook (c) a magnetic chess set (d) a vacuum cleaner
20. 20.⚖️ 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) True (b) False
21. 21.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a drinking straw (c) a magnetic pin holder (d) a vacuum cleaner
22. 22.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) air pressure (b) magnetism
23. 23.True or false: a vacuum cleaner works by magnetism. (a) True (b) False
24. 24.🧺 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 towel (c) a stiff postcard (d) turmeric powder
25. 25.True or false: a bicycle pump works by magnetism. (a) True (b) False
26. 26.True or false: a drinking straw works by magnetism. (a) True (b) False
27. 27.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is magnetic (c) it is hotter (d) it is heavier
28. 28.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
29. 29.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) False (b) True
30. 30.True or false: a suction hook works by air pressure. (a) True (b) False
31. 31.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) it looks nicer (c) little air left inside (d) water is heavier
32. 32.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
33. 33.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
34. 34.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is kept the same. (a) True (b) False
35. 35.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a mirror (b) a sink or a bucket (c) a stiff postcard (d) a towel
36. 36.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) over a laptop (c) near a plug point (d) over a sink or bucket
37. 37.⚖️ 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
38. 38.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a medicine dropper (c) a compass needle (d) a suction hook
39. 39.⚖️ 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 keep it the same (b) we change it (c) we measure it
40. 40.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) False (b) True

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