Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 679 · 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.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
2. 2.⚖️ 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 glass (c) the way we turn it (d) how full the glass is
3. 3.True or false: a fridge magnet works by air pressure. (a) False (b) True
4. 4.🛟 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 hotter (d) it is heavier
5. 5.🥛 Which of these works by magnetism? (a) a fridge magnet (b) a bicycle pump (c) a drinking straw (d) a vacuum cleaner
6. 6.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a suction hook (c) a fridge magnet (d) a compass needle
7. 7.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
8. 8.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) it looks nicer (c) the card gets wet (d) little air left inside
9. 9.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to make it rain (c) to cool the glass (d) to catch any spills
10. 10.🥛 Which of these works by air pressure? (a) a compass needle (b) a magnetic pin holder (c) a bicycle pump (d) a fridge magnet
11. 11.🥛 Which of these works by air pressure? (a) a drinking straw (b) a magnetic pin holder (c) a magnetic chess set (d) a fridge magnet
12. 12.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a glass of water (c) yeast (d) a stiff postcard
13. 13.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
14. 14.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a balloon (c) a towel (d) a sink or a bucket
15. 15.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
16. 16.🥛 Which of these works by magnetism? (a) a drinking straw (b) a vacuum cleaner (c) a bicycle pump (d) a compass needle
17. 17.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) True (b) False
18. 18.⚖️ 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 measure it (b) we change it (c) we keep it the same
19. 19.🧺 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) yeast
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.⚖️ 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) how full the glass is (c) the same glass
22. 22.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
23. 23.True or false: yeast is needed for the card-on-a-glass trick. (a) False (b) True
24. 24.⚖️ 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
25. 25.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a battery cell (c) turmeric powder (d) a glass of water
26. 26.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) False (b) True
27. 27.🔍 Which is the odd one out? (a) a bicycle pump (b) a fridge magnet (c) a magnetic pin holder (d) a compass needle
28. 28.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) the cold water (c) glue on the card (d) air pushing up
29. 29.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic chess set (c) a fridge magnet (d) a vacuum cleaner
30. 30.🔮 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
31. 31.⚖️ 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
32. 32.🧺 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 stiff postcard (d) a magnet
33. 33.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
34. 34.⚖️ 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
35. 35.🔍 Which is the odd one out? (a) a medicine dropper (b) a magnetic pin holder (c) a drinking straw (d) a suction hook
36. 36.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) air pressure (b) magnetism
37. 37.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) air (c) smoke (d) sand
38. 38.True or false: a bicycle pump works by magnetism. (a) False (b) True
39. 39.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
40. 40.True or false: a bicycle pump works by air pressure. (a) False (b) True

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