Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 383 · 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 stiff postcard is needed for the card-on-a-glass trick. (a) False (b) True
2. 2.True or false: a fridge magnet works by magnetism. (a) False (b) True
3. 3.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a magnet (c) a sink or a bucket (d) a stiff postcard
4. 4.⚖️ 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
5. 5.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) turmeric powder (c) a battery cell (d) a glass of water
6. 6.⚖️ 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 change it (c) we measure it
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 measure it (b) we keep it the same (c) we change it
8. 8.True or false: a magnetic pin holder works by magnetism. (a) True (b) False
9. 9.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
10. 10.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
11. 11.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a sink or a bucket (c) a balloon (d) a glass of water
12. 12.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) the bottle is magnetic (c) air inside pushes back (d) water is hiding there
13. 13.True or false: a mirror is not needed for the card-on-a-glass trick. (a) True (b) False
14. 14.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
15. 15.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
16. 16.🔮 Why do we try the card trick over a sink or a bucket? (a) to catch any spills (b) to make it rain (c) to cool the glass (d) to grow plants
17. 17.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
18. 18.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
19. 19.🔍 Which is the odd one out? (a) a compass needle (b) a vacuum cleaner (c) a fridge magnet (d) a magnetic pin holder
20. 20.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) turmeric powder (c) a towel (d) a sink or a bucket
21. 21.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
22. 22.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is magnetic (c) it is heavier (d) it will not break
23. 23.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
24. 24.⚖️ 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 what we measure. (a) True (b) False
25. 25.True or false: a vacuum cleaner works by magnetism. (a) False (b) True
26. 26.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
27. 27.True or false: a vacuum cleaner works by air pressure. (a) False (b) True
28. 28.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a magnetic pin holder (c) a drinking straw (d) a compass needle
29. 29.🔍 Which is the odd one out? (a) a compass needle (b) a medicine dropper (c) a vacuum cleaner (d) a drinking straw
30. 30.True or false: a mirror is needed for the card-on-a-glass trick. (a) True (b) False
31. 31.🥛 Which of these works by magnetism? (a) a drinking straw (b) a vacuum cleaner (c) a bicycle pump (d) a fridge magnet
32. 32.⚖️ 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) whether the card stays (c) the same glass (d) the same card
33. 33.True or false: a balloon is needed for the card-on-a-glass trick. (a) False (b) True
34. 34.True or false: a bicycle pump works by magnetism. (a) True (b) False
35. 35.True or false: yeast is not needed for the card-on-a-glass trick. (a) False (b) True
36. 36.True or false: a towel is needed for the card-on-a-glass trick. (a) False (b) True
37. 37.🧺 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 battery cell (d) a glass of water
38. 38.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
39. 39.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a balloon (b) a glass of water (c) a sink or a bucket (d) a stiff postcard
40. 40.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is the one thing we change. (a) True (b) False

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