Air Pressure Experiment Worksheet

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

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