Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 138 · 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) turmeric powder (b) a towel (c) a glass of water (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 glass of water (b) a towel (c) a stiff postcard (d) a mirror
3. 3.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
4. 4.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) turmeric powder (c) a mirror (d) a sink or a bucket
5. 5.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) a glass of water (c) a balloon (d) a magnet
6. 6.🥛 Which of these works by magnetism? (a) a fridge magnet (b) a bicycle pump (c) a vacuum cleaner (d) a medicine dropper
7. 7.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
8. 8.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is hotter (c) it is magnetic (d) it will not break
9. 9.🔍 Which is the odd one out? (a) a suction hook (b) a magnetic pin holder (c) a medicine dropper (d) a drinking straw
10. 10.🧺 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 magnet (c) a stiff postcard (d) a towel
11. 11.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
12. 12.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card flies away (b) the glass breaks (c) the water turns to ice (d) the card stays on
13. 13.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a magnet (b) a glass of water (c) a stiff postcard (d) a sink or a bucket
14. 14.⚖️ 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) the way we turn it (c) how full the glass is (d) whether the card stays
15. 15.🛟 Where should you do the card-and-glass trick? (a) over a sink or bucket (b) over a laptop (c) on a bed (d) near a plug point
16. 16.True or false: a suction hook works by magnetism. (a) True (b) False
17. 17.🔍 Which is the odd one out? (a) a fridge magnet (b) a magnetic chess set (c) a magnetic pin holder (d) a bicycle pump
18. 18.True or false: a drinking straw works by air pressure. (a) False (b) True
19. 19.🔮 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
20. 20.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a sink or a bucket (c) a glass of water (d) a balloon
21. 21.🥤 Why does juice go up a drinking straw when you sip? (a) air pushes it up (b) the straw is magnetic (c) the straw is hot (d) juice likes plastic
22. 22.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
23. 23.⚖️ 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
24. 24.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
25. 25.🔍 Which is the odd one out? (a) a suction hook (b) a vacuum cleaner (c) a medicine dropper (d) a compass needle
26. 26.🔮 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) water is hiding there (d) the bottle is magnetic
27. 27.True or false: a battery cell is needed for the card-on-a-glass trick. (a) False (b) True
28. 28.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a battery cell (c) a towel (d) a stiff postcard
29. 29.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
30. 30.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
31. 31.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) False (b) True
32. 32.🥛 Does a compass needle work by air pressure or by magnetism? (a) magnetism (b) air pressure
33. 33.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
34. 34.⚖️ 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
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.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
37. 37.True or false: a bicycle pump works by magnetism. (a) False (b) True
38. 38.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a battery cell (c) a stiff postcard (d) a magnet
39. 39.⚖️ 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 change it (c) we measure it
40. 40.True or false: a mirror is not needed for the card-on-a-glass trick. (a) True (b) False

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