Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 84 · 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 is not needed for the card-on-a-glass trick? (a) a towel (b) a sink or a bucket (c) a stiff postcard (d) a balloon
2. 2.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) smoke (c) water (d) air
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 balloon (c) a towel (d) a stiff postcard
4. 4.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a stiff postcard (c) yeast (d) a towel
5. 5.True or false: a suction hook works by air pressure. (a) True (b) False
6. 6.True or false: a balloon is needed for the card-on-a-glass trick. (a) False (b) True
7. 7.⚖️ 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) how full the glass is (c) the same card (d) the way we turn it
8. 8.🔍 Which is the odd one out? (a) a drinking straw (b) a medicine dropper (c) a vacuum cleaner (d) a magnetic pin holder
9. 9.⚖️ 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 change it (b) we measure it (c) we keep it the same
10. 10.🔍 Which is the odd one out? (a) a bicycle pump (b) a compass needle (c) a magnetic pin holder (d) a fridge magnet
11. 11.⚖️ 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
12. 12.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a suction hook (c) a magnetic pin holder (d) a compass needle
13. 13.True or false: a compass needle works by magnetism. (a) False (b) True
14. 14.True or false: a balloon is not needed for the card-on-a-glass trick. (a) True (b) False
15. 15.True or false: a suction hook works by magnetism. (a) False (b) True
16. 16.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) the bottle is magnetic (c) the cap is sticky (d) air inside pushes back
17. 17.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
18. 18.⚖️ 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) False (b) True
19. 19.🔍 Which is the odd one out? (a) a fridge magnet (b) a magnetic chess set (c) a drinking straw (d) a magnetic pin holder
20. 20.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is what we measure. (a) False (b) True
21. 21.True or false: a medicine dropper works by magnetism. (a) False (b) True
22. 22.🛟 Where should you do the card-and-glass trick? (a) over a sink or bucket (b) over a laptop (c) near a plug point (d) on a bed
23. 23.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to cool the glass (c) to catch any spills (d) to grow plants
24. 24.🧺 Which of these is needed for the card-on-a-glass trick? (a) a towel (b) a balloon (c) turmeric powder (d) a battery cell
25. 25.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) juice likes plastic (c) the straw is magnetic (d) air pushes it up
26. 26.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) air pressure (b) magnetism
27. 27.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is hotter (c) it is magnetic (d) it will not break
28. 28.🔍 Which is the odd one out? (a) a compass needle (b) a suction hook (c) a drinking straw (d) a medicine dropper
29. 29.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
30. 30.True or false: a compass needle works by air pressure. (a) False (b) True
31. 31.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card flies away (b) the water turns to ice (c) the glass breaks (d) the card stays on
32. 32.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
33. 33.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a balloon (c) a magnet (d) a stiff postcard
34. 34.True or false: a battery cell is needed for the card-on-a-glass trick. (a) True (b) False
35. 35.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) False (b) True
36. 36.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a glass of water (c) a mirror (d) a sink or a bucket
37. 37.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic pin holder (c) a bicycle pump (d) a compass needle
38. 38.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a drinking straw (c) a bicycle pump (d) a compass needle
39. 39.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a compass needle (c) a magnetic pin holder (d) a drinking straw
40. 40.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True

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