Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 858 · 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.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) air pressure (b) magnetism
2. 2.True or false: a vacuum cleaner works by air pressure. (a) True (b) False
3. 3.True or false: yeast is not needed for the card-on-a-glass trick. (a) True (b) False
4. 4.True or false: a balloon is not needed for the card-on-a-glass trick. (a) False (b) True
5. 5.⚖️ 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) how full the glass is (c) the same glass (d) whether the card stays
6. 6.True or false: a bicycle pump works by air pressure. (a) False (b) True
7. 7.True or false: a towel is not needed for the card-on-a-glass trick. (a) True (b) False
8. 8.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
9. 9.True or false: a drinking straw works by air pressure. (a) False (b) True
10. 10.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a magnet (c) a sink or a bucket (d) a mirror
11. 11.⚖️ 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 same glass (b) the way we turn it (c) whether the card stays (d) how full the glass is
12. 12.🔍 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 stays on (d) the card flies away
13. 13.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
14. 14.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
15. 15.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is magnetic (c) it is hotter (d) it will not break
16. 16.🔍 Which is the odd one out? (a) a bicycle pump (b) a suction hook (c) a magnetic chess set (d) a vacuum cleaner
17. 17.True or false: a suction hook works by magnetism. (a) False (b) True
18. 18.True or false: a bicycle pump works by magnetism. (a) False (b) True
19. 19.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
20. 20.⚖️ 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) False (b) True
21. 21.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a compass needle (c) a vacuum cleaner (d) a fridge magnet
22. 22.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is magnetic (b) air pushes it up (c) juice likes plastic (d) the straw is hot
23. 23.🔍 Which is the odd one out? (a) a compass needle (b) a medicine dropper (c) a fridge magnet (d) a magnetic pin holder
24. 24.🥛 Why is it best to fill the glass right to the top? (a) it looks nicer (b) water is heavier (c) little air left inside (d) the card gets wet
25. 25.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) water is hiding there (c) the cap is sticky (d) the bottle is magnetic
26. 26.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
27. 27.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to cool the glass (c) to make it rain (d) to catch any spills
28. 28.🧺 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 sink or a bucket (d) turmeric powder
29. 29.🧺 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 magnet (d) a stiff postcard
30. 30.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a suction hook (c) a magnetic pin holder (d) a bicycle pump
31. 31.🥛 Which of these works by magnetism? (a) a drinking straw (b) a compass needle (c) a suction hook (d) a medicine dropper
32. 32.🥛 Which of these works by magnetism? (a) a suction hook (b) a bicycle pump (c) a medicine dropper (d) a magnetic chess set
33. 33.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) True (b) False
34. 34.⚖️ 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
35. 35.⚖️ 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
36. 36.⚖️ 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 kept the same. (a) False (b) True
37. 37.🧺 Which of these is needed for the card-on-a-glass trick? (a) a stiff postcard (b) a magnet (c) yeast (d) turmeric powder
38. 38.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure
39. 39.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a magnet (c) a battery cell (d) a glass of water
40. 40.True or false: a battery cell is needed for the card-on-a-glass trick. (a) False (b) True

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