Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 827 · 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.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
2. 2.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) the cold water (c) air pushing up (d) glue on the card
3. 3.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
4. 4.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is magnetic (b) the straw is hot (c) juice likes plastic (d) air pushes it up
5. 5.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a towel (c) a sink or a bucket (d) a magnet
6. 6.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) air pressure (b) magnetism
7. 7.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a fridge magnet (c) a suction hook (d) a vacuum cleaner
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 glass of water (c) a sink or a bucket (d) yeast
9. 9.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
10. 10.🧺 Do we need a glass of water 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 kept the same? (a) whether the card stays (b) the same card (c) how full the glass is
12. 12.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
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 the one thing we change. (a) False (b) True
14. 14.⚖️ 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 keep it the same (c) we change it
15. 15.⚖️ 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
16. 16.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
17. 17.True or false: a magnet is needed for the card-on-a-glass trick. (a) True (b) False
18. 18.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
19. 19.True or false: a compass needle works by magnetism. (a) True (b) False
20. 20.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is what we measure. (a) False (b) True
21. 21.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to make it rain (c) to catch any spills (d) to grow plants
22. 22.🔍 Which is the odd one out? (a) a medicine dropper (b) a suction hook (c) a drinking straw (d) a magnetic chess set
23. 23.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a towel (c) a glass of water (d) a battery cell
24. 24.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a towel (c) a mirror (d) a stiff postcard
25. 25.🧺 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) turmeric powder (d) a sink or a bucket
26. 26.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
27. 27.True or false: a drinking straw works by air pressure. (a) False (b) True
28. 28.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) air inside pushes back (c) water is hiding there (d) the cap is sticky
29. 29.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is heavier (c) it is hotter (d) it will not break
30. 30.True or false: a glass of water is not 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? Which of these is the one thing we change? (a) whether the card stays (b) how full the glass is (c) the same glass (d) the same card
32. 32.True or false: a bicycle pump works by magnetism. (a) True (b) False
33. 33.🔍 Which is the odd one out? (a) a drinking straw (b) a compass needle (c) a vacuum cleaner (d) a medicine dropper
34. 34.⚖️ 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 measure it (b) we change it (c) we keep it the same
35. 35.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
36. 36.⚖️ 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 measure it (c) we keep it the same
37. 37.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) sand (c) smoke (d) air
38. 38.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
39. 39.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
40. 40.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) water is heavier (c) it looks nicer (d) little air left inside

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