Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 509 · 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.🧺 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
2. 2.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a magnet (c) turmeric powder (d) a stiff postcard
3. 3.True or false: a bicycle pump works by magnetism. (a) True (b) False
4. 4.🔍 Which is the odd one out? (a) a bicycle pump (b) a suction hook (c) a compass needle (d) a drinking straw
5. 5.🧺 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) a towel (d) a mirror
6. 6.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a mirror (b) a sink or a bucket (c) a towel (d) a stiff postcard
7. 7.True or false: a magnetic chess set works by air pressure. (a) True (b) False
8. 8.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a magnetic pin holder (c) a suction hook (d) a drinking straw
9. 9.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to grow plants (c) to cool the glass (d) to catch any spills
10. 10.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) smoke (c) air (d) water
11. 11.🔍 Which is the odd one out? (a) a magnetic chess set (b) a medicine dropper (c) a compass needle (d) a magnetic pin holder
12. 12.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a mirror (c) a sink or a bucket (d) turmeric powder
13. 13.🥛 Does a compass needle work by air pressure or by magnetism? (a) magnetism (b) air pressure
14. 14.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
15. 15.🧺 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) a battery cell
16. 16.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a magnet (b) a glass of water (c) a sink or a bucket (d) a stiff postcard
17. 17.True or false: a compass needle works by air pressure. (a) True (b) False
18. 18.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a stiff postcard (c) a balloon (d) a towel
19. 19.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a glass of water (c) a battery cell (d) turmeric powder
20. 20.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) the cap is sticky (c) the bottle is magnetic (d) water is hiding there
21. 21.⚖️ 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) True (b) False
22. 22.True or false: a battery cell is needed for the card-on-a-glass trick. (a) False (b) True
23. 23.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
24. 24.⚖️ 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 measure it (b) we keep it the same (c) we change it
25. 25.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the card flies away (c) the card stays on (d) the water turns to ice
26. 26.🧺 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 sink or a bucket (d) a balloon
27. 27.🥛 Which of these works by magnetism? (a) a compass needle (b) a vacuum cleaner (c) a bicycle pump (d) a suction hook
28. 28.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is heavier (c) it will not break (d) it is magnetic
29. 29.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) True (b) False
30. 30.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
31. 31.True or false: a fridge magnet works by air pressure. (a) False (b) True
32. 32.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
33. 33.🥛 Which of these works by magnetism? (a) a fridge magnet (b) a suction hook (c) a medicine dropper (d) a drinking straw
34. 34.⚖️ 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 card (b) how full the glass is (c) the same glass (d) whether the card stays
35. 35.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
36. 36.⚖️ 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 keep it the same (b) we change it (c) we measure it
37. 37.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
38. 38.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a compass needle (c) a suction hook (d) a fridge magnet
39. 39.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is what we measure. (a) True (b) False
40. 40.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is magnetic (b) air pushes it up (c) the straw is hot (d) juice likes plastic

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