Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 220 · 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.⚖️ 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
2. 2.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) air pressure (b) magnetism
3. 3.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) glue on the card (c) air pushing up (d) a magnet
4. 4.⚖️ 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
5. 5.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) yeast (c) a mirror (d) a stiff postcard
6. 6.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
7. 7.⚖️ 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 measure it (c) we change it
8. 8.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a suction hook (c) a magnetic chess set (d) a bicycle pump
9. 9.True or false: a bicycle pump works by air pressure. (a) False (b) True
10. 10.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) False (b) True
11. 11.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
12. 12.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a battery cell (c) a towel (d) yeast
13. 13.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is kept the same. (a) True (b) False
14. 14.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a mirror (b) a stiff postcard (c) a glass of water (d) a towel
15. 15.⚖️ 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
16. 16.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a suction hook (c) a medicine dropper (d) a magnetic chess set
17. 17.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it will not break (c) it is magnetic (d) it is heavier
18. 18.⚖️ 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) the way we turn it (c) how full the glass is
19. 19.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
20. 20.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a magnetic pin holder (c) a bicycle pump (d) a suction hook
21. 21.🔮 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
22. 22.True or false: a magnetic chess set works by air pressure. (a) True (b) False
23. 23.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a balloon (c) a stiff postcard (d) a sink or a bucket
24. 24.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
25. 25.🥤 Why does juice go up a drinking straw when you sip? (a) juice likes plastic (b) the straw is hot (c) the straw is magnetic (d) air pushes it up
26. 26.⚖️ 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
27. 27.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) on a bed (c) near a plug point (d) over a sink or bucket
28. 28.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
29. 29.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
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 change it (b) we keep it the same (c) we measure it
31. 31.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a magnetic pin holder (c) a compass needle (d) a fridge magnet
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) turmeric powder (c) a stiff postcard (d) a glass of water
33. 33.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the water turns to ice (c) the card flies away (d) the card stays on
34. 34.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
35. 35.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic chess set (c) a drinking straw (d) a magnetic pin holder
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 towel (c) a battery cell (d) a stiff postcard
37. 37.⚖️ 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 what we measure. (a) True (b) False
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 the one thing we change. (a) False (b) True
39. 39.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a compass needle (c) a suction hook (d) a magnetic chess set
40. 40.True or false: a drinking straw works by air pressure. (a) True (b) False

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