Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 884 · 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 of these works by magnetism? (a) a medicine dropper (b) a suction hook (c) a drinking straw (d) a magnetic pin holder
2. 2.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a glass of water (c) a balloon (d) a sink or a bucket
3. 3.🔮 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 cool the glass (d) to grow plants
4. 4.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a drinking straw (c) a magnetic pin holder (d) a compass needle
5. 5.🔍 Which is the odd one out? (a) a drinking straw (b) a magnetic chess set (c) a bicycle pump (d) a vacuum cleaner
6. 6.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
7. 7.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a mirror (c) a stiff postcard (d) a magnet
8. 8.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is magnetic (c) it is heavier (d) it is hotter
9. 9.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) the bottle is magnetic (c) air inside pushes back (d) the cap is sticky
10. 10.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
11. 11.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
12. 12.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) True (b) False
13. 13.⚖️ 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) False (b) True
14. 14.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) over a laptop (c) over a sink or bucket (d) on a bed
15. 15.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) water (c) air (d) smoke
16. 16.True or false: a magnetic chess set works by magnetism. (a) False (b) True
17. 17.⚖️ 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 what we measure. (a) True (b) False
18. 18.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
19. 19.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a sink or a bucket (c) a towel (d) a magnet
20. 20.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the way we turn it”? (a) we change it (b) we measure it (c) we keep it the same
21. 21.True or false: a mirror is needed for the card-on-a-glass trick. (a) True (b) False
22. 22.⚖️ 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 keep it the same (c) we measure it
23. 23.🔍 Which is the odd one out? (a) a suction hook (b) a magnetic pin holder (c) a compass needle (d) a fridge magnet
24. 24.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is magnetic (b) the straw is hot (c) air pushes it up (d) juice likes plastic
25. 25.⚖️ 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) whether the card stays (b) the same card (c) the same glass (d) how full the glass is
26. 26.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) True (b) False
27. 27.⚖️ 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 change it (b) we keep it the same (c) we measure it
28. 28.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
29. 29.⚖️ 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 same card (c) whether the card stays
30. 30.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic pin holder (c) a compass needle (d) a vacuum cleaner
31. 31.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
32. 32.True or false: a compass needle works by magnetism. (a) True (b) False
33. 33.True or false: a balloon is not needed for the card-on-a-glass trick. (a) False (b) True
34. 34.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) air pushing up (c) the cold water (d) a magnet
35. 35.🧺 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 magnet (c) a stiff postcard (d) a towel
36. 36.🔍 Which is the odd one out? (a) a fridge magnet (b) a suction hook (c) a vacuum cleaner (d) a bicycle pump
37. 37.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) turmeric powder (c) a stiff postcard (d) a towel
38. 38.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
39. 39.🥛 Why is it best to fill the glass right to the top? (a) little air left inside (b) it looks nicer (c) the card gets wet (d) water is heavier
40. 40.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) turmeric powder (c) a glass of water (d) a magnet

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