Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 55 · 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 stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
2. 2.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a sink or a bucket (c) a towel (d) yeast
3. 3.⚖️ 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 the one thing we change. (a) True (b) False
4. 4.⚖️ 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 change it (b) we measure it (c) we keep it the same
5. 5.True or false: a suction hook works by air pressure. (a) False (b) True
6. 6.⚖️ 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
7. 7.True or false: a battery cell is needed for the card-on-a-glass trick. (a) True (b) False
8. 8.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a stiff postcard (c) a towel (d) a balloon
9. 9.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a magnet (c) a stiff postcard (d) a battery cell
10. 10.🔮 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
11. 11.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a mirror (b) a stiff postcard (c) a sink or a bucket (d) a glass of water
12. 12.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) glue on the card (c) air pushing up (d) a magnet
13. 13.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a magnet (b) a towel (c) a stiff postcard (d) a glass of water
14. 14.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) the bottle is magnetic (c) water is hiding there (d) the cap is sticky
15. 15.🥤 Why does juice go up a drinking straw when you sip? (a) air pushes it up (b) the straw is hot (c) juice likes plastic (d) the straw is magnetic
16. 16.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a sink or a bucket (c) turmeric powder (d) a glass of water
17. 17.⚖️ 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
18. 18.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) yeast (c) a sink or a bucket (d) a glass of water
19. 19.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
20. 20.🥛 Why is it best to fill the glass right to the top? (a) it looks nicer (b) the card gets wet (c) water is heavier (d) little air left inside
21. 21.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a magnetic pin holder (c) a drinking straw (d) a fridge magnet
22. 22.⚖️ 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) the same card (c) whether the card stays
23. 23.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
24. 24.⚖️ 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) False (b) True
25. 25.🔍 Which is the odd one out? (a) a bicycle pump (b) a drinking straw (c) a vacuum cleaner (d) a compass needle
26. 26.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
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 kept the same. (a) True (b) False
28. 28.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a battery cell (c) a sink or a bucket (d) yeast
29. 29.⚖️ 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 same card (c) how full the glass is (d) the way we turn it
30. 30.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
31. 31.🛟 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
32. 32.True or false: a drinking straw works by air pressure. (a) False (b) True
33. 33.🥛 Which of these works by magnetism? (a) a suction hook (b) a vacuum cleaner (c) a bicycle pump (d) a magnetic chess set
34. 34.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a battery cell (b) a glass of water (c) a towel (d) a sink or a bucket
35. 35.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
36. 36.True or false: a balloon is not needed for the card-on-a-glass trick. (a) True (b) False
37. 37.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) False (b) True
38. 38.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure
39. 39.⚖️ 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 change it (c) we measure it
40. 40.True or false: a vacuum cleaner works by air pressure. (a) True (b) False

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