Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 127 · 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 drinking straw (b) a magnetic pin holder (c) a compass needle (d) a magnetic chess set
2. 2.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
3. 3.🔍 Which is the odd one out? (a) a suction hook (b) a drinking straw (c) a magnetic pin holder (d) a bicycle pump
4. 4.⚖️ 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 keep it the same (b) we change it (c) we measure it
5. 5.🔍 Which is the odd one out? (a) a magnetic chess set (b) a compass needle (c) a medicine dropper (d) a fridge magnet
6. 6.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
7. 7.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) air (c) sand (d) water
8. 8.🧺 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 battery cell (d) a towel
9. 9.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is magnetic (c) it will not break (d) it is heavier
10. 10.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
11. 11.⚖️ 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
12. 12.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) on a bed (c) over a sink or bucket (d) over a laptop
13. 13.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
14. 14.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) a magnet (c) glue on the card (d) air pushing up
15. 15.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a mirror (c) a sink or a bucket (d) a balloon
16. 16.True or false: a mirror is needed for the card-on-a-glass trick. (a) True (b) False
17. 17.⚖️ 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
18. 18.🧺 Which of these is not needed for the card-on-a-glass trick? (a) turmeric powder (b) a towel (c) a sink or a bucket (d) a stiff postcard
19. 19.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) the straw is magnetic (c) juice likes plastic (d) air pushes it up
20. 20.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
21. 21.🔍 Which is the odd one out? (a) a bicycle pump (b) a drinking straw (c) a vacuum cleaner (d) a magnetic chess set
22. 22.True or false: a bicycle pump works by magnetism. (a) True (b) False
23. 23.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
24. 24.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a mirror (b) a stiff postcard (c) a glass of water (d) a towel
25. 25.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to catch any spills (c) to grow plants (d) to cool the glass
26. 26.⚖️ 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
27. 27.True or false: a towel is not needed for the card-on-a-glass trick. (a) False (b) True
28. 28.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
29. 29.⚖️ 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
30. 30.True or false: a magnetic pin holder works by magnetism. (a) True (b) False
31. 31.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) water is hiding there (c) the cap is sticky (d) the bottle is magnetic
32. 32.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) False (b) True
33. 33.🥛 Which of these works by magnetism? (a) a magnetic chess set (b) a medicine dropper (c) a vacuum cleaner (d) a drinking straw
34. 34.🥛 Does a compass needle work by air pressure or by magnetism? (a) magnetism (b) air pressure
35. 35.True or false: a bicycle pump works by air pressure. (a) False (b) True
36. 36.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is the one thing we change. (a) False (b) True
37. 37.True or false: a balloon is needed for the card-on-a-glass trick. (a) True (b) False
38. 38.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a battery cell (b) a sink or a bucket (c) a stiff postcard (d) a glass of water
39. 39.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
40. 40.True or false: a medicine dropper works by magnetism. (a) True (b) False

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