Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 412 · 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.True or false: a suction hook works by air pressure. (a) False (b) True
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 stiff postcard (c) a balloon (d) a towel
3. 3.⚖️ 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) whether the card stays (c) how full the glass is
4. 4.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a drinking straw (c) a magnetic pin holder (d) a bicycle pump
5. 5.⚖️ 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 way we turn it (b) the same glass (c) how full the glass is (d) whether the card stays
6. 6.🧺 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 towel (d) a stiff postcard
7. 7.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
8. 8.⚖️ 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) True (b) False
9. 9.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) on a bed (c) near a plug point (d) over a sink or bucket
10. 10.⚖️ 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 what we measure. (a) False (b) True
11. 11.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a vacuum cleaner (c) a compass needle (d) a magnetic chess set
12. 12.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
13. 13.🔍 Which is the odd one out? (a) a suction hook (b) a magnetic chess set (c) a drinking straw (d) a vacuum cleaner
14. 14.True or false: a fridge magnet works by air pressure. (a) True (b) False
15. 15.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
16. 16.🧺 Which of these is needed for the card-on-a-glass trick? (a) a glass of water (b) a mirror (c) a battery cell (d) yeast
17. 17.⚖️ 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) the same card (c) whether the card stays
18. 18.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) air (c) sand (d) water
19. 19.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a balloon (b) a sink or a bucket (c) a towel (d) a stiff postcard
20. 20.True or false: a magnetic chess set works by magnetism. (a) False (b) True
21. 21.🧺 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 sink or a bucket (d) a battery cell
22. 22.🥛 Why is it best to fill the glass right to the top? (a) little air left inside (b) the card gets wet (c) it looks nicer (d) water is heavier
23. 23.True or false: a drinking straw works by magnetism. (a) False (b) True
24. 24.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a stiff postcard (c) a towel (d) turmeric powder
25. 25.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the way we turn it is the one thing we change. (a) True (b) False
26. 26.🔍 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 water turns to ice (c) the card stays on (d) the glass breaks
27. 27.🔍 Which is the odd one out? (a) a suction hook (b) a drinking straw (c) a fridge magnet (d) a vacuum cleaner
28. 28.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
29. 29.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) air inside pushes back (c) water is hiding there (d) the cap is sticky
30. 30.True or false: a medicine dropper works by magnetism. (a) True (b) False
31. 31.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is magnetic (b) the straw is hot (c) air pushes it up (d) juice likes plastic
32. 32.⚖️ 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
33. 33.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) turmeric powder (c) a stiff postcard (d) a sink or a bucket
34. 34.🥛 Which of these works by air pressure? (a) a bicycle pump (b) a magnetic pin holder (c) a magnetic chess set (d) a fridge magnet
35. 35.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
36. 36.True or false: a mirror is needed for the card-on-a-glass trick. (a) True (b) False
37. 37.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) turmeric powder (c) a magnet (d) a towel
38. 38.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is the one thing we change. (a) True (b) False
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.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False

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