Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 464 · 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 is not needed for the card-on-a-glass trick? (a) turmeric powder (b) a glass of water (c) a sink or a bucket (d) a stiff postcard
2. 2.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a magnet (b) a stiff postcard (c) a glass of water (d) a sink or a bucket
3. 3.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) the cap is sticky (c) the bottle is magnetic (d) air inside pushes back
4. 4.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) on a bed (c) over a sink or bucket (d) over a laptop
5. 5.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a mirror (c) a towel (d) a stiff postcard
6. 6.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
7. 7.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) yeast (c) a glass of water (d) a sink or a bucket
8. 8.True or false: yeast is needed for the card-on-a-glass trick. (a) False (b) True
9. 9.⚖️ 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 measure it (b) we keep it the same (c) we change it
10. 10.True or false: a medicine dropper works by magnetism. (a) True (b) False
11. 11.🔍 Which is the odd one out? (a) a suction hook (b) a fridge magnet (c) a vacuum cleaner (d) a drinking straw
12. 12.⚖️ 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
13. 13.⚖️ 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
14. 14.🧺 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 sink or a bucket (d) a balloon
15. 15.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) water (c) air (d) sand
16. 16.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
17. 17.🥤 Why does juice go up a drinking straw when you sip? (a) air pushes it up (b) the straw is hot (c) the straw is magnetic (d) juice likes plastic
18. 18.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
19. 19.🧺 Which of these is needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a battery cell (c) a balloon (d) a magnet
20. 20.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is heavier (c) it is magnetic (d) it will not break
21. 21.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) a balloon (c) a magnet (d) a towel
22. 22.⚖️ 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
23. 23.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
24. 24.True or false: a magnet is needed for the card-on-a-glass trick. (a) True (b) False
25. 25.⚖️ 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) the same card (b) how full the glass is (c) whether the card stays
26. 26.🥛 Which of these works by magnetism? (a) a magnetic chess set (b) a vacuum cleaner (c) a bicycle pump (d) a drinking straw
27. 27.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) True (b) False
28. 28.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) the card gets wet (c) little air left inside (d) it looks nicer
29. 29.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
30. 30.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) False (b) True
31. 31.⚖️ 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
32. 32.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a medicine dropper (c) a vacuum cleaner (d) a fridge magnet
33. 33.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) True (b) False
34. 34.True or false: a battery cell is needed for the card-on-a-glass trick. (a) False (b) True
35. 35.🧺 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 towel
36. 36.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) True (b) False
37. 37.True or false: a fridge magnet works by magnetism. (a) True (b) False
38. 38.⚖️ 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
39. 39.True or false: a magnetic pin holder works by air pressure. (a) False (b) True
40. 40.📘 Air presses on everything around us. What is this push called? (a) magnetism (b) air pressure (c) friction (d) sunlight

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