Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 699 · 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 stiff postcard (c) a glass of water (d) a sink or a bucket
2. 2.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) False (b) True
3. 3.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) True (b) False
4. 4.⚖️ 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) how full the glass is (b) whether the card stays (c) the same glass
5. 5.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
6. 6.⚖️ 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 change it (c) we keep it the same
7. 7.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) turmeric powder (c) a battery cell (d) a sink or a bucket
8. 8.True or false: a suction hook works by magnetism. (a) True (b) False
9. 9.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) it looks nicer (c) little air left inside (d) the card gets wet
10. 10.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
11. 11.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
12. 12.True or false: a fridge magnet works by air pressure. (a) False (b) True
13. 13.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) True (b) False
14. 14.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a stiff postcard (c) a sink or a bucket (d) a mirror
15. 15.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a compass needle (c) a vacuum cleaner (d) a magnetic chess set
16. 16.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a bicycle pump (c) a medicine dropper (d) a magnetic pin holder
17. 17.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) over a laptop (c) over a sink or bucket (d) near a plug point
18. 18.🔍 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 card stays on (c) the glass breaks (d) the water turns to ice
19. 19.⚖️ 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 change it (b) we measure it (c) we keep it the same
20. 20.⚖️ 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) the way we turn it (c) how full the glass is (d) the same card
21. 21.⚖️ 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) True (b) False
22. 22.🧺 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 stiff postcard (d) a sink or a bucket
23. 23.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) air inside pushes back (c) water is hiding there (d) the bottle is magnetic
24. 24.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is magnetic (c) it is heavier (d) it is hotter
25. 25.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a sink or a bucket (c) a battery cell (d) a stiff postcard
26. 26.True or false: a bicycle pump works by air pressure. (a) True (b) False
27. 27.True or false: a towel is not 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 glass of water (b) a balloon (c) a towel (d) a sink or a bucket
29. 29.🧺 Which of these is needed for the card-on-a-glass trick? (a) a stiff postcard (b) a magnet (c) yeast (d) a battery cell
30. 30.🥛 Does a compass needle work by air pressure or by magnetism? (a) magnetism (b) air pressure
31. 31.⚖️ 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) whether the card stays (b) the same glass (c) the same card (d) how full the glass is
32. 32.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a magnet (c) yeast (d) a glass of water
33. 33.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) turmeric powder (c) a battery cell (d) a towel
34. 34.True or false: a magnetic chess set works by magnetism. (a) True (b) False
35. 35.True or false: a magnetic pin holder works by magnetism. (a) True (b) False
36. 36.True or false: a suction hook works by air pressure. (a) False (b) True
37. 37.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a suction hook (c) a bicycle pump (d) a compass needle
38. 38.True or false: a magnetic chess set works by air pressure. (a) False (b) True
39. 39.⚖️ 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 change it (b) we measure it (c) we keep it the same
40. 40.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a compass needle (c) a fridge magnet (d) a magnetic pin holder

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