Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 101 · 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.True or false: a suction hook works by air pressure. (a) True (b) False
2. 2.⚖️ 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 card (b) how full the glass is (c) the way we turn it (d) the same glass
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) False (b) True
4. 4.⚖️ 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
5. 5.🧺 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
6. 6.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the way we turn it is what we measure. (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 kept the same? (a) whether the card stays (b) the same card (c) how full the glass is
8. 8.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) True (b) False
9. 9.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a magnetic chess set (c) a medicine dropper (d) a bicycle pump
10. 10.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) yeast (c) a sink or a bucket (d) a stiff postcard
11. 11.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a mirror (c) yeast (d) a stiff postcard
12. 12.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
13. 13.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
14. 14.True or false: a magnetic chess set works by magnetism. (a) False (b) True
15. 15.🥛 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
16. 16.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
17. 17.📘 Air presses on everything around us. What is this push called? (a) air pressure (b) magnetism (c) sunlight (d) friction
18. 18.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a glass of water (c) a stiff postcard (d) a magnet
19. 19.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
20. 20.🧺 Which of these is not needed for the card-on-a-glass trick? (a) turmeric powder (b) a stiff postcard (c) a glass of water (d) a towel
21. 21.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is magnetic (c) it will not break (d) it is hotter
22. 22.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
23. 23.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) the bottle is magnetic (c) the cap is sticky (d) air inside pushes back
24. 24.True or false: a magnetic pin holder works by air pressure. (a) False (b) True
25. 25.True or false: a medicine dropper works by air pressure. (a) False (b) True
26. 26.True or false: a bicycle pump works by air pressure. (a) True (b) False
27. 27.⚖️ 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
28. 28.True or false: a balloon is not needed for the card-on-a-glass trick. (a) True (b) False
29. 29.🧺 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 battery cell (d) a sink or a bucket
30. 30.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a drinking straw (c) a fridge magnet (d) a bicycle pump
31. 31.True or false: a magnet is not needed for the card-on-a-glass trick. (a) False (b) True
32. 32.🥛 Which of these works by air pressure? (a) a drinking straw (b) a magnetic pin holder (c) a compass needle (d) a magnetic chess set
33. 33.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) True (b) False
34. 34.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the water turns to ice (c) the card flies away (d) the card stays on
35. 35.⚖️ 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
36. 36.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) the straw is magnetic (c) juice likes plastic (d) air pushes it up
37. 37.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
38. 38.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the way we turn it is kept the same. (a) True (b) False
39. 39.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) turmeric powder (c) a towel (d) a sink or a bucket
40. 40.🔍 Which is the odd one out? (a) a magnetic chess set (b) a suction hook (c) a compass needle (d) a fridge magnet

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