Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 686 · 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.🔍 Which is the odd one out? (a) a fridge magnet (b) a drinking straw (c) a magnetic pin holder (d) a magnetic chess set
2. 2.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card flies away (b) the card stays on (c) the glass breaks (d) the water turns to ice
3. 3.🥛 What holds the card up against the upside-down glass? (a) air pushing up (b) glue on the card (c) a magnet (d) the cold water
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) False (b) True
5. 5.⚖️ 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 measure it (c) we change it
6. 6.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) the bottle is magnetic (c) water is hiding there (d) the cap is sticky
7. 7.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
8. 8.⚖️ 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) how full the glass is (c) the same glass (d) whether the card stays
9. 9.🧺 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 sink or a bucket (d) a towel
10. 10.⚖️ 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 measure it (c) we keep it the same
11. 11.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to catch any spills (c) to grow plants (d) to make it rain
12. 12.⚖️ 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
13. 13.True or false: a towel is needed for the card-on-a-glass trick. (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 sink or a bucket (b) a battery cell (c) a towel (d) a glass of water
15. 15.🥛 Which of these works by air pressure? (a) a medicine dropper (b) a compass needle (c) a fridge magnet (d) a magnetic chess set
16. 16.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a glass of water (c) a mirror (d) a stiff postcard
17. 17.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is heavier (c) it is hotter (d) it is magnetic
18. 18.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
19. 19.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) False (b) True
20. 20.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a magnet (c) a stiff postcard (d) a sink or a bucket
21. 21.🥤 Why does juice go up a drinking straw when you sip? (a) air pushes it up (b) the straw is magnetic (c) the straw is hot (d) juice likes plastic
22. 22.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a drinking straw (c) a suction hook (d) a fridge magnet
23. 23.⚖️ 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) True (b) False
24. 24.⚖️ 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) False (b) True
25. 25.True or false: a mirror is needed for the card-on-a-glass trick. (a) True (b) False
26. 26.True or false: a vacuum cleaner works by magnetism. (a) False (b) True
27. 27.True or false: a bicycle pump works by magnetism. (a) True (b) False
28. 28.⚖️ 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
29. 29.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
30. 30.True or false: a battery cell is needed for the card-on-a-glass trick. (a) True (b) False
31. 31.⚖️ 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
32. 32.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
33. 33.True or false: a suction hook works by magnetism. (a) True (b) False
34. 34.True or false: a compass needle works by magnetism. (a) True (b) False
35. 35.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) near a plug point (c) on a bed (d) over a sink or bucket
36. 36.⚖️ 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) how full the glass is (b) the same glass (c) whether the card stays
37. 37.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a drinking straw (c) a magnetic pin holder (d) a bicycle pump
38. 38.⚖️ 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
39. 39.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a drinking straw (c) a bicycle pump (d) a magnetic chess set
40. 40.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a drinking straw (c) a suction hook (d) a fridge magnet

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