Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 576 · 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 bicycle pump (b) a vacuum cleaner (c) a medicine dropper (d) a fridge magnet
2. 2.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
3. 3.⚖️ 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
4. 4.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) the cap is sticky (c) water is hiding there (d) the bottle is magnetic
5. 5.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
6. 6.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) on a bed (c) over a sink or bucket (d) near a plug point
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 glass”? (a) we measure it (b) we keep it the same (c) we change it
8. 8.True or false: yeast is needed for the card-on-a-glass trick. (a) True (b) False
9. 9.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) False (b) True
10. 10.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
11. 11.⚖️ 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) the same glass (c) how full the glass is (d) whether the card stays
12. 12.⚖️ 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
13. 13.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to cool the glass (c) to grow plants (d) to catch any spills
14. 14.⚖️ 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
15. 15.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) True (b) False
16. 16.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) True (b) False
17. 17.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
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) the way we turn it (b) how full the glass is (c) whether the card stays
19. 19.True or false: a vacuum cleaner works by magnetism. (a) True (b) False
20. 20.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
21. 21.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
22. 22.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
23. 23.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
24. 24.🥤 Why does juice go up a drinking straw when you sip? (a) juice likes plastic (b) the straw is magnetic (c) the straw is hot (d) air pushes it up
25. 25.⚖️ 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 keep it the same (b) we change it (c) we measure it
26. 26.True or false: a magnet is needed for the card-on-a-glass trick. (a) True (b) False
27. 27.True or false: a medicine dropper works by air pressure. (a) True (b) False
28. 28.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a balloon (b) a glass of water (c) a sink or a bucket (d) a towel
29. 29.🧺 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) yeast (d) a towel
30. 30.🔍 Which is the odd one out? (a) a medicine dropper (b) a bicycle pump (c) a magnetic chess set (d) a vacuum cleaner
31. 31.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a magnet (c) a towel (d) a glass of water
32. 32.⚖️ 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) whether the card stays (b) the same glass (c) how full the glass is (d) the same card
33. 33.⚖️ 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 change it (b) we keep it the same (c) we measure it
34. 34.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
35. 35.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a compass needle (c) a fridge magnet (d) a magnetic pin holder
36. 36.🔍 Which is the odd one out? (a) a drinking straw (b) a suction hook (c) a compass needle (d) a vacuum cleaner
37. 37.🔍 Which is the odd one out? (a) a drinking straw (b) a magnetic pin holder (c) a compass needle (d) a fridge magnet
38. 38.🔍 Which is the odd one out? (a) a medicine dropper (b) a magnetic pin holder (c) a suction hook (d) a drinking straw
39. 39.⚖️ 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
40. 40.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is heavier (c) it will not break (d) it is hotter

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