Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 105 · 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 of these works by air pressure? (a) a compass needle (b) a magnetic chess set (c) a medicine dropper (d) a fridge magnet
2. 2.True or false: a drinking straw works by magnetism. (a) False (b) True
3. 3.🧺 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 stiff postcard (c) a towel (d) yeast
4. 4.True or false: a magnetic pin holder works by air pressure. (a) True (b) False
5. 5.True or false: a compass needle works by magnetism. (a) True (b) False
6. 6.🥛 Does a compass needle work by air pressure or by magnetism? (a) magnetism (b) air pressure
7. 7.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
8. 8.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a sink or a bucket (c) a glass of water (d) a mirror
9. 9.🔍 Which is the odd one out? (a) a suction hook (b) a medicine dropper (c) a fridge magnet (d) a drinking straw
10. 10.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a fridge magnet (c) a suction hook (d) a drinking straw
11. 11.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a sink or a bucket (c) a battery cell (d) a towel
12. 12.🥛 Which of these works by air pressure? (a) a vacuum cleaner (b) a fridge magnet (c) a magnetic chess set (d) a magnetic pin holder
13. 13.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) air inside pushes back (c) the bottle is magnetic (d) the cap is sticky
14. 14.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
15. 15.🛟 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 magnetic (d) it is hotter
16. 16.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
17. 17.⚖️ 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 card (c) the same glass (d) how full the glass is
18. 18.🥛 Why is it best to fill the glass right to the top? (a) little air left inside (b) water is heavier (c) it looks nicer (d) the card gets wet
19. 19.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a sink or a bucket (c) a balloon (d) a stiff postcard
20. 20.True or false: a suction hook works by magnetism. (a) False (b) True
21. 21.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
22. 22.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
23. 23.🔍 Which is the odd one out? (a) a fridge magnet (b) a magnetic chess set (c) a bicycle pump (d) a magnetic pin holder
24. 24.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a battery cell (b) a glass of water (c) a stiff postcard (d) a sink or a bucket
25. 25.⚖️ 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
26. 26.⚖️ 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) how full the glass is (c) the way we turn it (d) the same card
27. 27.⚖️ 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
28. 28.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a towel (c) a stiff postcard (d) a mirror
29. 29.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
30. 30.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) over a sink or bucket (c) near a plug point (d) over a laptop
31. 31.True or false: a compass needle works by air pressure. (a) False (b) True
32. 32.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
33. 33.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to catch any spills (c) to cool the glass (d) to grow plants
34. 34.🥛 Which of these works by air pressure? (a) a compass needle (b) a bicycle pump (c) a magnetic pin holder (d) a magnetic chess set
35. 35.⚖️ 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) whether the card stays (c) the same card
36. 36.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
37. 37.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a glass of water (c) a stiff postcard (d) turmeric powder
38. 38.🥤 Why does juice go up a drinking straw when you sip? (a) air pushes it up (b) juice likes plastic (c) the straw is magnetic (d) the straw is hot
39. 39.🥛 What holds the card up against the upside-down glass? (a) air pushing up (b) the cold water (c) glue on the card (d) a magnet
40. 40.True or false: a bicycle pump works by air pressure. (a) True (b) False

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