Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 707 · 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: yeast is needed for the card-on-a-glass trick. (a) False (b) True
2. 2.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to cool the glass (c) to catch any spills (d) to make it rain
3. 3.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a drinking straw (c) a magnetic chess set (d) a fridge magnet
4. 4.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) False (b) True
5. 5.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
6. 6.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a drinking straw (c) a magnetic pin holder (d) a suction hook
7. 7.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
8. 8.True or false: a magnetic pin holder works by magnetism. (a) False (b) True
9. 9.⚖️ 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
10. 10.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a stiff postcard (c) a glass of water (d) yeast
11. 11.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a towel (c) a mirror (d) a sink or a bucket
12. 12.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) True (b) False
13. 13.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) water is heavier (c) it looks nicer (d) little air left inside
14. 14.🔍 Which is the odd one out? (a) a suction hook (b) a medicine dropper (c) a vacuum cleaner (d) a magnetic chess set
15. 15.⚖️ 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) the way we turn it (c) how full the glass is
16. 16.⚖️ 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
17. 17.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) False (b) True
18. 18.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
19. 19.🧺 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) turmeric powder (d) a towel
20. 20.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
21. 21.True or false: a vacuum cleaner works by magnetism. (a) False (b) True
22. 22.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
23. 23.🔮 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) the cap is sticky (d) water is hiding there
24. 24.🔍 Which is the odd one out? (a) a bicycle pump (b) a fridge magnet (c) a magnetic chess set (d) a magnetic pin holder
25. 25.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
26. 26.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a fridge magnet (c) a medicine dropper (d) a compass needle
27. 27.⚖️ 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 measure it (b) we change it (c) we keep it the same
28. 28.🛟 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
29. 29.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a compass needle (c) a magnetic chess set (d) a medicine dropper
30. 30.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) yeast (c) a stiff postcard (d) turmeric powder
31. 31.🔍 Which is the odd one out? (a) a drinking straw (b) a vacuum cleaner (c) a medicine dropper (d) a fridge magnet
32. 32.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a suction hook (c) a vacuum cleaner (d) a compass needle
33. 33.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is magnetic (b) the straw is hot (c) air pushes it up (d) juice likes plastic
34. 34.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a magnetic pin holder (c) a fridge magnet (d) a magnetic chess set
35. 35.🧺 Which of these is needed for the card-on-a-glass trick? (a) a sink or a bucket (b) yeast (c) a magnet (d) a mirror
36. 36.🔍 Which is the odd one out? (a) a medicine dropper (b) a drinking straw (c) a suction hook (d) a compass needle
37. 37.True or false: a balloon is not needed for the card-on-a-glass trick. (a) False (b) True
38. 38.⚖️ 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 same glass (c) the way we turn it (d) how full the glass is
39. 39.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is hotter (c) it will not break (d) it is heavier
40. 40.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a battery cell (c) a towel (d) a sink or a bucket

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