Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 28 · 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.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
2. 2.True or false: a vacuum cleaner works by magnetism. (a) True (b) False
3. 3.🧺 Do we need yeast 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) turmeric powder (b) a glass of water (c) a battery cell (d) a balloon
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 “how full the glass is”? (a) we change it (b) we measure it (c) we keep it the same
7. 7.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic chess set (c) a magnetic pin holder (d) a medicine dropper
8. 8.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) sand (c) smoke (d) water
9. 9.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a balloon (b) a glass of water (c) a stiff postcard (d) a sink or a bucket
10. 10.🔍 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
11. 11.True or false: a magnetic chess set works by magnetism. (a) False (b) True
12. 12.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is hotter (c) it is heavier (d) it will not break
13. 13.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
14. 14.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is what we measure. (a) True (b) False
15. 15.⚖️ 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
16. 16.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
17. 17.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) air pushing up (c) the cold water (d) glue on the card
18. 18.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) water is hiding there (c) the cap is sticky (d) air inside pushes back
19. 19.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a fridge magnet (c) a drinking straw (d) a bicycle pump
20. 20.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) little air left inside (c) it looks nicer (d) the card gets wet
21. 21.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
22. 22.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a battery cell (b) a glass of water (c) a sink or a bucket (d) a towel
23. 23.🧺 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 stiff postcard (d) a sink or a bucket
24. 24.🧺 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 glass of water (c) turmeric powder (d) a towel
25. 25.⚖️ 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 change it (b) we keep it the same (c) we measure it
26. 26.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
27. 27.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a sink or a bucket (c) a mirror (d) a battery cell
28. 28.⚖️ 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
29. 29.🥛 Which of these works by magnetism? (a) a compass needle (b) a suction hook (c) a medicine dropper (d) a vacuum cleaner
30. 30.⚖️ 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
31. 31.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
32. 32.True or false: yeast is needed for the card-on-a-glass trick. (a) False (b) True
33. 33.⚖️ 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 measure it (b) we change it (c) we keep it the same
34. 34.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a drinking straw (c) a fridge magnet (d) a magnetic chess set
35. 35.⚖️ 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 card (c) how full the glass is (d) the same glass
36. 36.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
37. 37.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) magnetism (b) air pressure
38. 38.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
39. 39.🛟 Where should you do the card-and-glass trick? (a) over a sink or bucket (b) on a bed (c) near a plug point (d) over a laptop
40. 40.⚖️ 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 way we turn it

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