Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 404 · 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 fridge magnet works by magnetism. (a) True (b) False
2. 2.🥛 What holds the card up against the upside-down glass? (a) air pushing up (b) a magnet (c) the cold water (d) glue on the card
3. 3.🔍 Which is the odd one out? (a) a drinking straw (b) a magnetic pin holder (c) a bicycle pump (d) a medicine dropper
4. 4.True or false: a glass of water is needed for the card-on-a-glass trick. (a) True (b) False
5. 5.True or false: a magnetic chess set works by magnetism. (a) True (b) False
6. 6.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) over a laptop (c) on a bed (d) over a sink or bucket
7. 7.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
8. 8.🧺 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 stiff postcard (d) a mirror
9. 9.🥤 Why does juice go up a drinking straw when you sip? (a) air pushes it up (b) the straw is hot (c) the straw is magnetic (d) juice likes plastic
10. 10.True or false: a magnet is needed for the card-on-a-glass trick. (a) True (b) False
11. 11.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) yeast (c) a balloon (d) a sink or a bucket
12. 12.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a sink or a bucket (c) a glass of water (d) a magnet
13. 13.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
14. 14.⚖️ 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 change it (b) we measure it (c) we keep it the same
15. 15.🔍 Which is the odd one out? (a) a medicine dropper (b) a fridge magnet (c) a magnetic pin holder (d) a compass needle
16. 16.🔍 Which is the odd one out? (a) a magnetic chess set (b) a suction hook (c) a fridge magnet (d) a magnetic pin holder
17. 17.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the card stays on (c) the card flies away (d) the water turns to ice
18. 18.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
19. 19.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a vacuum cleaner (c) a compass needle (d) a fridge magnet
20. 20.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) a glass of water (c) a balloon (d) turmeric powder
21. 21.⚖️ 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
22. 22.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to catch any spills (c) to grow plants (d) to make it rain
23. 23.⚖️ 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) True (b) False
24. 24.🥛 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
25. 25.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
26. 26.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic pin holder (c) a medicine dropper (d) a compass needle
27. 27.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a suction hook (c) a magnetic pin holder (d) a medicine dropper
28. 28.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) air pressure (b) magnetism
29. 29.True or false: a mirror is needed for the card-on-a-glass trick. (a) True (b) False
30. 30.🥛 Which of these works by magnetism? (a) a suction hook (b) a drinking straw (c) a magnetic chess set (d) a bicycle pump
31. 31.True or false: a medicine dropper works by magnetism. (a) False (b) True
32. 32.⚖️ 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) how full the glass is (c) the same glass (d) whether the card stays
33. 33.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) air pressure (b) magnetism
34. 34.🥛 Which of these works by air pressure? (a) a suction hook (b) a fridge magnet (c) a compass needle (d) a magnetic chess set
35. 35.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a magnet (c) a towel (d) turmeric powder
36. 36.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is the one thing we change. (a) False (b) True
37. 37.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) the cap is sticky (c) water is hiding there (d) air inside pushes back
38. 38.🔍 Which is the odd one out? (a) a suction hook (b) a magnetic chess set (c) a drinking straw (d) a vacuum cleaner
39. 39.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
40. 40.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is heavier (c) it will not break (d) it is magnetic

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