Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 316 · 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.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the water turns to ice (b) the glass breaks (c) the card stays on (d) the card flies away
2. 2.⚖️ 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 the one thing we change. (a) True (b) False
3. 3.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a towel (c) a magnet (d) a stiff postcard
4. 4.⚖️ 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
5. 5.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a towel (c) a mirror (d) turmeric powder
6. 6.🔍 Which is the odd one out? (a) a magnetic chess set (b) a compass needle (c) a suction hook (d) a fridge magnet
7. 7.🔍 Which is the odd one out? (a) a suction hook (b) a drinking straw (c) a vacuum cleaner (d) a fridge magnet
8. 8.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a sink or a bucket (c) yeast (d) a glass of water
9. 9.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
10. 10.True or false: a magnetic pin holder works by magnetism. (a) True (b) False
11. 11.⚖️ 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 keep it the same (b) we measure it (c) we change it
12. 12.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) over a laptop (c) near a plug point (d) over a sink or bucket
13. 13.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a sink or a bucket (b) a stiff postcard (c) a towel (d) a balloon
14. 14.True or false: a drinking straw works by magnetism. (a) False (b) True
15. 15.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
16. 16.⚖️ 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
17. 17.True or false: a towel is needed for the card-on-a-glass trick. (a) True (b) False
18. 18.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
19. 19.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a mirror (c) a sink or a bucket (d) a stiff postcard
20. 20.True or false: a towel is not needed for the card-on-a-glass trick. (a) False (b) True
21. 21.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
22. 22.⚖️ 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
23. 23.True or false: a suction hook works by magnetism. (a) True (b) False
24. 24.🔮 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
25. 25.⚖️ 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
26. 26.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a medicine dropper (c) a magnetic chess set (d) a fridge magnet
27. 27.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) True (b) False
28. 28.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a magnet (b) a glass of water (c) a sink or a bucket (d) a stiff postcard
29. 29.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) smoke (c) water (d) air
30. 30.🥤 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
31. 31.⚖️ 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) how full the glass is (c) the way we turn it (d) the same card
32. 32.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a mirror (c) turmeric powder (d) a stiff postcard
33. 33.⚖️ 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
34. 34.🛟 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 hotter (d) it is heavier
35. 35.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a bicycle pump (c) a magnetic pin holder (d) a fridge magnet
36. 36.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
37. 37.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) turmeric powder (b) a stiff postcard (c) a towel (d) a sink or a bucket
38. 38.⚖️ 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 way we turn it (b) whether the card stays (c) how full the glass is (d) the same card
39. 39.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) False (b) True
40. 40.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) False (b) True

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