Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 474 · 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 magnetic pin holder works by air pressure. (a) True (b) False
2. 2.🔮 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 grow plants (d) to catch any spills
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? Which of these is kept the same? (a) how full the glass is (b) the way we turn it (c) whether the card stays
5. 5.🥛 Does a compass needle work by air pressure or by magnetism? (a) magnetism (b) air pressure
6. 6.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card stays on (b) the glass breaks (c) the water turns to ice (d) the card flies away
7. 7.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a towel (c) a sink or a bucket (d) a balloon
8. 8.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
9. 9.⚖️ 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 the one thing we change. (a) False (b) True
10. 10.True or false: a suction hook works by magnetism. (a) False (b) True
11. 11.⚖️ 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) whether the card stays (c) the same card (d) the way we turn it
12. 12.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
13. 13.True or false: a compass needle works by air pressure. (a) True (b) False
14. 14.⚖️ 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 keep it the same (c) we measure it
15. 15.True or false: a compass needle works by magnetism. (a) True (b) False
16. 16.⚖️ 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
17. 17.🥛 Which of these works by air pressure? (a) a compass needle (b) a drinking straw (c) a magnetic pin holder (d) a magnetic chess set
18. 18.🧺 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 glass of water (c) a magnet (d) a towel
19. 19.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) air inside pushes back (c) the bottle is magnetic (d) the cap is sticky
20. 20.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a glass of water (c) turmeric powder (d) yeast
21. 21.⚖️ 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) False (b) True
22. 22.🔍 Which is the odd one out? (a) a suction hook (b) a drinking straw (c) a bicycle pump (d) a compass needle
23. 23.🧺 Do we need a mirror 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? What do we do with “the way we turn it”? (a) we measure it (b) we change it (c) we keep it the same
25. 25.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) yeast (b) a stiff postcard (c) a sink or a bucket (d) a glass of water
26. 26.True or false: a bicycle pump works by air pressure. (a) False (b) True
27. 27.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
28. 28.🥤 Why does juice go up a drinking straw when you sip? (a) air pushes it up (b) juice likes plastic (c) the straw is hot (d) the straw is magnetic
29. 29.True or false: a glass of water is needed for the card-on-a-glass trick. (a) True (b) False
30. 30.⚖️ 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
31. 31.⚖️ 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) the same card (b) whether the card stays (c) how full the glass is
32. 32.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) glue on the card (c) air pushing up (d) the cold water
33. 33.True or false: a medicine dropper works by magnetism. (a) True (b) False
34. 34.True or false: a fridge magnet works by magnetism. (a) True (b) False
35. 35.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) yeast (c) a stiff postcard (d) a sink or a bucket
36. 36.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) True (b) False
37. 37.🔍 Which is the odd one out? (a) a medicine dropper (b) a drinking straw (c) a magnetic chess set (d) a suction hook
38. 38.🥛 Which of these works by magnetism? (a) a suction hook (b) a compass needle (c) a drinking straw (d) a vacuum cleaner
39. 39.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) True (b) False
40. 40.⚖️ 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) whether the card stays (b) how full the glass is (c) the same glass

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