Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 692 · 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 mirror (b) a glass of water (c) a sink or a bucket (d) a stiff postcard
2. 2.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
3. 3.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) on a bed (c) near a plug point (d) over a sink or bucket
4. 4.⚖️ 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
5. 5.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a magnet (c) a sink or a bucket (d) a battery cell
6. 6.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) False (b) True
7. 7.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
8. 8.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a towel (c) yeast (d) a stiff postcard
9. 9.⚖️ 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) False (b) True
10. 10.🔍 Which is the odd one out? (a) a compass needle (b) a suction hook (c) a medicine dropper (d) a bicycle pump
11. 11.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) turmeric powder (b) a glass of water (c) a towel (d) a sink or a bucket
12. 12.⚖️ 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 way we turn it
13. 13.True or false: a medicine dropper works by magnetism. (a) False (b) True
14. 14.True or false: a towel is not needed for the card-on-a-glass trick. (a) True (b) False
15. 15.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) glue on the card (c) the cold water (d) air pushing up
16. 16.🔍 Which is the odd one out? (a) a bicycle pump (b) a drinking straw (c) a medicine dropper (d) a fridge magnet
17. 17.True or false: a magnet is not needed for the card-on-a-glass trick. (a) False (b) True
18. 18.True or false: a magnetic chess set works by air pressure. (a) True (b) False
19. 19.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a compass needle (c) a drinking straw (d) a magnetic pin holder
20. 20.🔍 Which is the odd one out? (a) a medicine dropper (b) a bicycle pump (c) a drinking straw (d) a magnetic pin holder
21. 21.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) the card gets wet (c) it looks nicer (d) little air left inside
22. 22.🔮 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
23. 23.🥛 Which of these works by magnetism? (a) a drinking straw (b) a vacuum cleaner (c) a magnetic pin holder (d) a bicycle pump
24. 24.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
25. 25.🥛 Which of these works by magnetism? (a) a fridge magnet (b) a medicine dropper (c) a vacuum cleaner (d) a bicycle pump
26. 26.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a magnetic chess set (c) a medicine dropper (d) a suction hook
27. 27.🧺 Which of these is needed for the card-on-a-glass trick? (a) a stiff postcard (b) yeast (c) a balloon (d) a magnet
28. 28.🔍 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
29. 29.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to grow plants (c) to cool the glass (d) to catch any spills
30. 30.⚖️ 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) how full the glass is (b) the same glass (c) the way we turn it (d) whether the card stays
31. 31.⚖️ 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 what we measure. (a) True (b) False
32. 32.🧺 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 balloon (c) a glass of water (d) a towel
33. 33.⚖️ 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) False (b) True
34. 34.⚖️ 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
35. 35.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
36. 36.True or false: a vacuum cleaner works by air pressure. (a) True (b) False
37. 37.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) air pressure (b) magnetism
38. 38.🧺 Which of these is not needed for the card-on-a-glass trick? (a) turmeric powder (b) a towel (c) a glass of water (d) a stiff postcard
39. 39.🥛 Which of these works by air pressure? (a) a compass needle (b) a medicine dropper (c) a magnetic pin holder (d) a magnetic chess set
40. 40.🧺 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 glass of water (d) a battery cell

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