Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 756 · 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 works by magnetism? (a) a fridge magnet (b) a suction hook (c) a medicine dropper (d) a vacuum cleaner
2. 2.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) glue on the card (c) a magnet (d) air pushing up
3. 3.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) air (c) smoke (d) water
4. 4.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a glass of water (c) yeast (d) a stiff postcard
5. 5.⚖️ 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
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 change it (b) we measure it (c) we keep it the same
7. 7.⚖️ 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 keep it the same (c) we change it
8. 8.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) True (b) False
9. 9.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
10. 10.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a balloon (c) yeast (d) a glass of water
11. 11.True or false: yeast is needed for the card-on-a-glass trick. (a) False (b) True
12. 12.🧺 Which of these is not needed for the card-on-a-glass trick? (a) turmeric powder (b) a sink or a bucket (c) a glass of water (d) a towel
13. 13.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to make it rain (c) to catch any spills (d) to cool the glass
14. 14.⚖️ 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
15. 15.🔮 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) the cap is sticky (d) water is hiding there
16. 16.🧺 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 towel (d) a magnet
17. 17.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
18. 18.True or false: a towel is needed for the card-on-a-glass trick. (a) True (b) False
19. 19.🧺 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 mirror (d) a glass of water
20. 20.🧺 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 glass of water (d) a towel
21. 21.True or false: a balloon is needed for the card-on-a-glass trick. (a) False (b) True
22. 22.⚖️ 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 the one thing we change. (a) True (b) False
23. 23.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
24. 24.True or false: a drinking straw works by air pressure. (a) False (b) True
25. 25.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) turmeric powder (b) a towel (c) a stiff postcard (d) a sink or a bucket
26. 26.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
27. 27.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the water turns to ice (c) the card stays on (d) the card flies away
28. 28.🔍 Which is the odd one out? (a) a bicycle pump (b) a drinking straw (c) a medicine dropper (d) a magnetic chess set
29. 29.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) on a bed (c) over a laptop (d) over a sink or bucket
30. 30.True or false: a vacuum cleaner works by air pressure. (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: the same glass is kept the same. (a) True (b) False
32. 32.True or false: a fridge magnet works by air pressure. (a) True (b) False
33. 33.True or false: a towel is not needed for the card-on-a-glass trick. (a) False (b) True
34. 34.True or false: yeast is not needed for the card-on-a-glass trick. (a) True (b) False
35. 35.⚖️ 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) whether the card stays (b) how full the glass is (c) the way we turn it (d) the same card
36. 36.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
37. 37.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
38. 38.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a battery cell (c) a sink or a bucket (d) a stiff postcard
39. 39.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a balloon (c) a stiff postcard (d) a battery cell
40. 40.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a magnet (b) a towel (c) a glass of water (d) a stiff postcard

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