Air Pressure Experiment Worksheet

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

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