Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 850 · 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 vacuum cleaner (b) a drinking straw (c) a bicycle pump (d) a magnetic pin holder
2. 2.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a fridge magnet (c) a magnetic pin holder (d) a suction hook
3. 3.🥛 Which of these works by magnetism? (a) a suction hook (b) a fridge magnet (c) a medicine dropper (d) a vacuum cleaner
4. 4.🛟 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
5. 5.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
6. 6.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) a magnet (c) the cold water (d) air pushing up
7. 7.🥤 Why does juice go up a drinking straw when you sip? (a) air pushes it up (b) the straw is magnetic (c) the straw is hot (d) juice likes plastic
8. 8.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
9. 9.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a drinking straw (c) a suction hook (d) a magnetic pin holder
10. 10.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) False (b) True
11. 11.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
12. 12.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) air pressure (b) magnetism
13. 13.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) smoke (c) water (d) air
14. 14.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) yeast (c) a towel (d) a sink or a bucket
15. 15.⚖️ 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 measure it (b) we keep it the same (c) we change it
16. 16.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
17. 17.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) air inside pushes back (c) the cap is sticky (d) water is hiding there
18. 18.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
19. 19.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) near a plug point (c) over a laptop (d) over a sink or bucket
20. 20.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a balloon (c) a towel (d) a glass of water
21. 21.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a magnetic chess set (c) a magnetic pin holder (d) a fridge magnet
22. 22.True or false: yeast is not needed for the card-on-a-glass trick. (a) True (b) False
23. 23.⚖️ 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 measure it (b) we keep it the same (c) we change it
24. 24.⚖️ 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 keep it the same (b) we measure it (c) we change it
25. 25.🔍 Which is the odd one out? (a) a drinking straw (b) a magnetic chess set (c) a compass needle (d) a fridge magnet
26. 26.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
27. 27.True or false: a magnetic chess set works by magnetism. (a) True (b) False
28. 28.True or false: a fridge magnet works by air pressure. (a) False (b) True
29. 29.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) a mirror (c) a stiff postcard (d) a magnet
30. 30.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a mirror (c) a sink or a bucket (d) a towel
31. 31.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
32. 32.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a suction hook (c) a compass needle (d) a fridge magnet
33. 33.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic chess set (c) a magnetic pin holder (d) a medicine dropper
34. 34.⚖️ 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) the same card (c) how full the glass is (d) whether the card stays
35. 35.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
36. 36.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
37. 37.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) the card gets wet (c) little air left inside (d) it looks nicer
38. 38.⚖️ 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) how full the glass is (b) the way we turn it (c) whether the card stays
39. 39.🥛 Which of these works by air pressure? (a) a drinking straw (b) a compass needle (c) a magnetic pin holder (d) a fridge magnet
40. 40.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card flies away (b) the card stays on (c) the glass breaks (d) the water turns to ice

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