Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 415 · 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.⚖️ 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
2. 2.True or false: a glass of water is needed for the card-on-a-glass trick. (a) True (b) False
3. 3.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
4. 4.🥤 Why does juice go up a drinking straw when you sip? (a) air pushes it up (b) juice likes plastic (c) the straw is magnetic (d) the straw is hot
5. 5.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to cool the glass (c) to catch any spills (d) to make it rain
6. 6.True or false: a towel is not needed for the card-on-a-glass trick. (a) False (b) True
7. 7.⚖️ 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) how full the glass is (d) the same card
8. 8.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
9. 9.🧺 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 stiff postcard (d) a balloon
10. 10.⚖️ 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 change it (b) we keep it the same (c) we measure it
11. 11.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) it looks nicer (c) little air left inside (d) water is heavier
12. 12.⚖️ 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 glass (b) how full the glass is (c) the way we turn it (d) whether the card stays
13. 13.True or false: yeast is not needed for the card-on-a-glass trick. (a) True (b) False
14. 14.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a bicycle pump (c) a medicine dropper (d) a compass needle
15. 15.🧺 Which of these is not needed for the card-on-a-glass trick? (a) turmeric powder (b) a towel (c) a glass of water (d) a sink or a bucket
16. 16.⚖️ 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 change it (b) we measure it (c) we keep it the same
17. 17.🥛 Which of these works by magnetism? (a) a drinking straw (b) a fridge magnet (c) a bicycle pump (d) a medicine dropper
18. 18.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
19. 19.🥛 Which of these works by air pressure? (a) a drinking straw (b) a compass needle (c) a magnetic pin holder (d) a magnetic chess set
20. 20.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a towel (c) a stiff postcard (d) yeast
21. 21.⚖️ 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 keep it the same (c) we change it
22. 22.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) True (b) False
23. 23.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
24. 24.🛟 Where should you do the card-and-glass trick? (a) over a sink or bucket (b) over a laptop (c) near a plug point (d) on a bed
25. 25.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) water (c) air (d) sand
26. 26.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is hotter (c) it will not break (d) it is magnetic
27. 27.🔮 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
28. 28.📘 Air presses on everything around us. What is this push called? (a) magnetism (b) friction (c) air pressure (d) sunlight
29. 29.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
30. 30.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
31. 31.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a towel (c) a battery cell (d) a glass of water
32. 32.🔍 Which is the odd one out? (a) a suction hook (b) a magnetic pin holder (c) a magnetic chess set (d) a compass needle
33. 33.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) False (b) True
34. 34.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a fridge magnet (c) a drinking straw (d) a suction hook
35. 35.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
36. 36.True or false: a fridge magnet works by air pressure. (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) a balloon (d) a mirror
38. 38.⚖️ 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) whether the card stays (c) the way we turn it
39. 39.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) True (b) False
40. 40.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a bicycle pump (c) a drinking straw (d) a magnetic pin holder

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