Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 773 · 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 is the odd one out? (a) a magnetic chess set (b) a compass needle (c) a fridge magnet (d) a suction hook
2. 2.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a sink or a bucket (c) a glass of water (d) turmeric powder
3. 3.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
4. 4.True or false: a suction hook works by air pressure. (a) False (b) True
5. 5.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
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 card”? (a) we change it (b) we keep it the same (c) we measure it
7. 7.True or false: a mirror is not needed for the card-on-a-glass trick. (a) True (b) False
8. 8.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
9. 9.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a suction hook (c) a magnetic pin holder (d) a compass needle
10. 10.True or false: a magnetic pin holder works by air pressure. (a) True (b) False
11. 11.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
12. 12.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a battery cell (c) a glass of water (d) a magnet
13. 13.🔮 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) air inside pushes back (d) the cap is sticky
14. 14.⚖️ 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 way we turn it (b) how full the glass is (c) the same card (d) whether the card stays
15. 15.True or false: a towel is needed for the card-on-a-glass trick. (a) False (b) True
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 what we measure. (a) False (b) True
17. 17.⚖️ 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 card (b) the way we turn it (c) the same glass (d) how full the glass is
18. 18.🛟 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
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 what we measure. (a) True (b) False
20. 20.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
21. 21.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
22. 22.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a fridge magnet (c) a suction hook (d) a bicycle pump
23. 23.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) air pushes it up (c) the straw is magnetic (d) juice likes plastic
24. 24.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
25. 25.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a battery cell (b) a glass of water (c) a stiff postcard (d) a towel
26. 26.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) True (b) False
27. 27.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) False (b) True
28. 28.🔮 Why do we try the card trick over a sink or a bucket? (a) to catch any spills (b) to make it rain (c) to grow plants (d) to cool the glass
29. 29.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
30. 30.True or false: a drinking straw works by air pressure. (a) True (b) False
31. 31.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a magnetic pin holder (c) a vacuum cleaner (d) a compass needle
32. 32.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a sink or a bucket (c) a towel (d) a magnet
33. 33.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) False (b) True
34. 34.True or false: a suction hook works by magnetism. (a) True (b) False
35. 35.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) turmeric powder (c) a towel (d) a magnet
36. 36.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a sink or a bucket (c) a glass of water (d) yeast
37. 37.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
38. 38.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) turmeric powder (c) a sink or a bucket (d) a magnet
39. 39.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
40. 40.🥛 Why is it best to fill the glass right to the top? (a) little air left inside (b) it looks nicer (c) the card gets wet (d) water is heavier

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