Air Pressure Experiment Worksheet

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

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