Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 559 · 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 vacuum cleaner works by magnetism. (a) False (b) True
2. 2.🔍 Which is the odd one out? (a) a fridge magnet (b) a magnetic chess set (c) a compass needle (d) a bicycle pump
3. 3.🔮 Why do we try the card trick over a sink or a bucket? (a) to catch any spills (b) to cool the glass (c) to grow plants (d) to make it rain
4. 4.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it will not break (c) it is magnetic (d) it is heavier
5. 5.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a fridge magnet (c) a suction hook (d) a compass needle
6. 6.⚖️ 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 same card (c) how full the glass is
7. 7.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) air (c) water (d) sand
8. 8.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a magnet (b) a glass of water (c) a stiff postcard (d) a towel
9. 9.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
10. 10.🧺 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 battery cell (d) a glass of water
11. 11.True or false: a suction hook works by air pressure. (a) False (b) True
12. 12.True or false: a drinking straw works by magnetism. (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.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
15. 15.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a mirror (c) a magnet (d) a towel
16. 16.⚖️ 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
17. 17.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) True (b) False
18. 18.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a mirror (b) a sink or a bucket (c) a glass of water (d) a towel
19. 19.True or false: a balloon is needed for the card-on-a-glass trick. (a) False (b) True
20. 20.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
21. 21.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) turmeric powder (c) a stiff postcard (d) a towel
22. 22.⚖️ 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 glass (b) how full the glass is (c) whether the card stays (d) the way we turn it
23. 23.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a magnet (c) a battery cell (d) a glass of water
24. 24.⚖️ 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 change it (c) we keep it the same
25. 25.🥛 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
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) how full the glass is (b) whether the card stays (c) the same glass
27. 27.🔍 Which is the odd one out? (a) a medicine dropper (b) a vacuum cleaner (c) a suction hook (d) a magnetic pin holder
28. 28.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is kept the same. (a) False (b) True
29. 29.True or false: a mirror is not needed for the card-on-a-glass trick. (a) False (b) True
30. 30.🛟 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
31. 31.True or false: a medicine dropper works by air pressure. (a) False (b) True
32. 32.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a drinking straw (c) a magnetic pin holder (d) a suction hook
33. 33.⚖️ 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) False (b) True
34. 34.True or false: yeast is not needed for the card-on-a-glass trick. (a) True (b) False
35. 35.🥤 Why does juice go up a drinking straw when you sip? (a) juice likes plastic (b) air pushes it up (c) the straw is magnetic (d) the straw is hot
36. 36.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
37. 37.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) True (b) False
38. 38.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
39. 39.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) water is hiding there (c) air inside pushes back (d) the cap is sticky
40. 40.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: how full the glass is is kept the same. (a) False (b) True

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