Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 251 · 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.🥛 Does a compass needle work by air pressure or by magnetism? (a) magnetism (b) air pressure
2. 2.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
3. 3.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
4. 4.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a compass needle (c) a magnetic chess set (d) a vacuum cleaner
5. 5.🛟 Where should you do the card-and-glass trick? (a) over a sink or bucket (b) near a plug point (c) over a laptop (d) on a bed
6. 6.True or false: a towel is needed for the card-on-a-glass trick. (a) True (b) False
7. 7.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a drinking straw (c) a fridge magnet (d) a compass needle
8. 8.⚖️ 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) whether the card stays (c) the same card (d) how full the glass is
9. 9.True or false: a suction hook works by magnetism. (a) False (b) True
10. 10.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a battery cell (b) a glass of water (c) a towel (d) a sink or a bucket
11. 11.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
12. 12.True or false: a vacuum cleaner works by magnetism. (a) True (b) False
13. 13.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
14. 14.🥛 Why is it best to fill the glass right to the top? (a) it looks nicer (b) little air left inside (c) water is heavier (d) the card gets wet
15. 15.🛟 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
16. 16.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a towel (c) a glass of water (d) a magnet
17. 17.🔮 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) air inside pushes back (d) water is hiding there
18. 18.🔮 Why do we try the card trick over a sink or a bucket? (a) to catch any spills (b) to cool the glass (c) to make it rain (d) to grow plants
19. 19.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is kept the same. (a) False (b) True
20. 20.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a magnet (b) a stiff postcard (c) a glass of water (d) a towel
21. 21.🔍 Which is the odd one out? (a) a medicine dropper (b) a drinking straw (c) a bicycle pump (d) a compass needle
22. 22.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a glass of water (c) yeast (d) a towel
23. 23.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a balloon (c) a sink or a bucket (d) a stiff postcard
24. 24.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a glass of water (c) a magnet (d) turmeric powder
25. 25.⚖️ 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 way we turn it (b) how full the glass is (c) whether the card stays
26. 26.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) True (b) False
27. 27.🧺 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 towel (c) a glass of water (d) a mirror
28. 28.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
29. 29.True or false: a suction hook works by air pressure. (a) True (b) False
30. 30.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
31. 31.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) turmeric powder (c) yeast (d) a stiff postcard
32. 32.🔍 Which is the odd one out? (a) a magnetic chess set (b) a magnetic pin holder (c) a compass needle (d) a suction hook
33. 33.⚖️ 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) how full the glass is (b) whether the card stays (c) the way we turn it (d) the same card
34. 34.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a stiff postcard (c) a mirror (d) a towel
35. 35.🧺 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 sink or a bucket
36. 36.⚖️ 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) True (b) False
37. 37.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same card”? (a) we measure it (b) we keep it the same (c) we change it
38. 38.🔍 Which is the odd one out? (a) a suction hook (b) a bicycle pump (c) a magnetic chess set (d) a drinking straw
39. 39.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a suction hook (c) a compass needle (d) a drinking straw
40. 40.🔍 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

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