Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 696 · 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 bicycle pump works by magnetism. (a) True (b) False
2. 2.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) near a plug point (c) over a sink or bucket (d) over a laptop
3. 3.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is heavier (c) it is magnetic (d) it will not break
4. 4.True or false: a glass of water is needed for the card-on-a-glass trick. (a) True (b) False
5. 5.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a sink or a bucket (c) a stiff postcard (d) a mirror
6. 6.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a compass needle (c) a bicycle pump (d) a magnetic chess set
7. 7.🥛 Which of these works by magnetism? (a) a magnetic chess set (b) a drinking straw (c) a suction hook (d) a medicine dropper
8. 8.🧺 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
9. 9.True or false: a magnetic pin holder works by air pressure. (a) True (b) False
10. 10.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) water (c) air (d) smoke
11. 11.🧺 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) turmeric powder (d) a glass of water
12. 12.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
13. 13.⚖️ 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
14. 14.⚖️ 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 measure it (c) we change it
15. 15.True or false: a mirror is needed for the card-on-a-glass trick. (a) True (b) False
16. 16.⚖️ 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) True (b) False
17. 17.🔍 Which is the odd one out? (a) a fridge magnet (b) a magnetic pin holder (c) a compass needle (d) a medicine dropper
18. 18.True or false: a balloon is needed for the card-on-a-glass trick. (a) True (b) False
19. 19.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a towel (c) turmeric powder (d) a sink or a bucket
20. 20.⚖️ 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 the one thing we change. (a) False (b) True
21. 21.🔍 Which is the odd one out? (a) a compass needle (b) a vacuum cleaner (c) a medicine dropper (d) a bicycle pump
22. 22.True or false: a fridge magnet works by air pressure. (a) False (b) True
23. 23.True or false: a compass needle works by air pressure. (a) True (b) False
24. 24.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
25. 25.⚖️ 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
26. 26.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
27. 27.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to grow plants (c) to make it rain (d) to catch any spills
28. 28.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) air inside pushes back (c) the bottle is magnetic (d) the cap is sticky
29. 29.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) True (b) False
30. 30.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
31. 31.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) True (b) False
32. 32.True or false: a fridge magnet works by magnetism. (a) True (b) False
33. 33.🔍 Which is the odd one out? (a) a drinking straw (b) a medicine dropper (c) a magnetic pin holder (d) a vacuum cleaner
34. 34.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a fridge magnet (c) a drinking straw (d) a compass needle
35. 35.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure
36. 36.🧺 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 glass of water (c) a towel (d) yeast
37. 37.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) turmeric powder (c) a balloon (d) a towel
38. 38.⚖️ 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 kept the same. (a) True (b) False
39. 39.⚖️ 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
40. 40.🥤 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

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