Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 281 · 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 needed for the card-on-a-glass trick? (a) a mirror (b) a balloon (c) turmeric powder (d) a stiff postcard
2. 2.⚖️ 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
3. 3.🔮 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
4. 4.True or false: a magnet is needed for the card-on-a-glass trick. (a) True (b) False
5. 5.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
6. 6.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a battery cell (c) a glass of water (d) a towel
7. 7.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it will not break (c) it is magnetic (d) it is hotter
8. 8.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
9. 9.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
10. 10.⚖️ 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 card (b) the way we turn it (c) whether the card stays (d) the same glass
11. 11.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) True (b) False
12. 12.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a compass needle (c) a vacuum cleaner (d) a fridge magnet
13. 13.True or false: a compass needle works by air pressure. (a) False (b) True
14. 14.True or false: a drinking straw works by air pressure. (a) True (b) False
15. 15.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
16. 16.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
17. 17.🥛 Which of these works by magnetism? (a) a compass needle (b) a medicine dropper (c) a suction hook (d) a drinking straw
18. 18.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “whether the card stays”? (a) we measure it (b) we keep it the same (c) we change it
19. 19.⚖️ 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
20. 20.⚖️ 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) the way we turn it (c) the same glass (d) whether the card stays
21. 21.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
22. 22.True or false: a balloon is needed for the card-on-a-glass trick. (a) True (b) False
23. 23.True or false: a medicine dropper works by air pressure. (a) False (b) True
24. 24.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) True (b) False
25. 25.⚖️ 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 change it (b) we measure it (c) we keep it the same
26. 26.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same card”? (a) we change it (b) we measure it (c) we keep it the same
27. 27.True or false: a magnetic pin holder works by air pressure. (a) True (b) False
28. 28.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
29. 29.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) little air left inside (c) water is heavier (d) it looks nicer
30. 30.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a mirror (b) a towel (c) a sink or a bucket (d) a glass of water
31. 31.⚖️ 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 measure it (c) we change it
32. 32.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
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 kept the same. (a) False (b) True
34. 34.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a balloon (c) a towel (d) a sink or a bucket
35. 35.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
36. 36.True or false: a towel is not needed for the card-on-a-glass trick. (a) True (b) False
37. 37.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) water is hiding there (c) air inside pushes back (d) the bottle is magnetic
38. 38.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) False (b) True
39. 39.🥛 Which of these works by magnetism? (a) a suction hook (b) a drinking straw (c) a magnetic pin holder (d) a medicine dropper
40. 40.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic pin holder (c) a magnetic chess set (d) a suction hook

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