Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 638 · 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.🔮 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) the cap is sticky (d) air inside pushes back
2. 2.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
3. 3.⚖️ 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) whether the card stays (c) the way we turn it (d) how full the glass is
4. 4.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a vacuum cleaner (c) a drinking straw (d) a magnetic pin holder
5. 5.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a fridge magnet (c) a compass needle (d) a drinking straw
6. 6.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a glass of water (c) a mirror (d) a balloon
7. 7.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) air pressure (b) magnetism
8. 8.True or false: a magnetic chess set works by air pressure. (a) False (b) True
9. 9.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
10. 10.⚖️ 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
11. 11.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a towel (c) a stiff postcard (d) yeast
12. 12.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
13. 13.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a drinking straw (c) a suction hook (d) a vacuum cleaner
14. 14.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a battery cell (c) a towel (d) a magnet
15. 15.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to cool the glass (c) to catch any spills (d) to make it rain
16. 16.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a magnet (b) a stiff postcard (c) a glass of water (d) a towel
17. 17.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is heavier (c) it is hotter (d) it will not break
18. 18.True or false: a bicycle pump works by magnetism. (a) True (b) False
19. 19.🔍 Which is the odd one out? (a) a bicycle pump (b) a compass needle (c) a suction hook (d) a drinking straw
20. 20.🛟 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
21. 21.🧺 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 magnet (d) a glass of water
22. 22.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
23. 23.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a glass of water (c) a towel (d) a balloon
24. 24.⚖️ 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 keep it the same (b) we change it (c) we measure it
25. 25.🔍 Which is the odd one out? (a) a medicine dropper (b) a drinking straw (c) a suction hook (d) a magnetic chess set
26. 26.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a compass needle (c) a magnetic chess set (d) a medicine dropper
27. 27.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) turmeric powder (c) a sink or a bucket (d) a stiff postcard
28. 28.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a battery cell (c) a towel (d) a stiff postcard
29. 29.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a mirror (c) a sink or a bucket (d) a towel
30. 30.⚖️ 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
31. 31.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
32. 32.🔍 Which is the odd one out? (a) a fridge magnet (b) a suction hook (c) a bicycle pump (d) a vacuum cleaner
33. 33.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is magnetic (b) juice likes plastic (c) the straw is hot (d) air pushes it up
34. 34.⚖️ 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
35. 35.⚖️ 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
36. 36.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a sink or a bucket (c) a mirror (d) a stiff postcard
37. 37.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
38. 38.True or false: a balloon is needed for the card-on-a-glass trick. (a) True (b) False
39. 39.🥛 Which of these works by magnetism? (a) a suction hook (b) a medicine dropper (c) a fridge magnet (d) a drinking straw
40. 40.True or false: a magnet is not needed for the card-on-a-glass trick. (a) True (b) False

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