Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 956 · 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 battery cell is needed for the card-on-a-glass trick. (a) True (b) False
2. 2.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) water is hiding there (c) the bottle is magnetic (d) air inside pushes back
3. 3.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
4. 4.🛟 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
5. 5.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a towel (c) a magnet (d) a balloon
6. 6.🥛 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
7. 7.⚖️ 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 kept the same. (a) False (b) True
8. 8.True or false: yeast is not needed for the card-on-a-glass trick. (a) False (b) True
9. 9.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a towel (c) a sink or a bucket (d) a magnet
10. 10.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
11. 11.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
12. 12.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
13. 13.🧺 Which of these is needed for the card-on-a-glass trick? (a) a stiff postcard (b) a battery cell (c) a magnet (d) a mirror
14. 14.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
15. 15.🔍 Which is the odd one out? (a) a magnetic chess set (b) a drinking straw (c) a bicycle pump (d) a vacuum cleaner
16. 16.⚖️ 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) the same card (b) whether the card stays (c) how full the glass is
17. 17.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
18. 18.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
19. 19.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
20. 20.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
21. 21.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
22. 22.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
23. 23.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a magnetic chess set (c) a fridge magnet (d) a drinking straw
24. 24.🔍 Which is the odd one out? (a) a compass needle (b) a bicycle pump (c) a vacuum cleaner (d) a drinking straw
25. 25.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a glass of water (c) yeast (d) a mirror
26. 26.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) over a sink or bucket (c) on a bed (d) over a laptop
27. 27.True or false: yeast is needed for the card-on-a-glass trick. (a) True (b) False
28. 28.True or false: a vacuum cleaner works by air pressure. (a) False (b) True
29. 29.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
30. 30.True or false: a mirror is not needed for the card-on-a-glass trick. (a) False (b) True
31. 31.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the way we turn it is what we measure. (a) True (b) False
32. 32.🔍 Which is the odd one out? (a) a fridge magnet (b) a bicycle pump (c) a compass needle (d) a magnetic chess set
33. 33.⚖️ 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 change it (c) we measure it
34. 34.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a sink or a bucket (b) a stiff postcard (c) a glass of water (d) a balloon
35. 35.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) smoke (c) water (d) air
36. 36.True or false: a fridge magnet works by magnetism. (a) False (b) True
37. 37.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is magnetic (b) air pushes it up (c) the straw is hot (d) juice likes plastic
38. 38.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
39. 39.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) the cold water (c) a magnet (d) air pushing up
40. 40.⚖️ 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

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