Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 479 · 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 battery cell is not needed for the card-on-a-glass trick. (a) False (b) True
2. 2.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
3. 3.⚖️ 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 measure it (b) we change it (c) we keep it the same
4. 4.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) the cold water (c) glue on the card (d) air pushing up
5. 5.🔍 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 card flies away (c) the card stays on (d) the glass breaks
6. 6.True or false: a balloon is not needed for the card-on-a-glass trick. (a) False (b) True
7. 7.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic pin holder (c) a compass needle (d) a bicycle pump
8. 8.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
9. 9.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a vacuum cleaner (c) a bicycle pump (d) a drinking straw
10. 10.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a stiff postcard (c) a mirror (d) a balloon
11. 11.🥛 Which of these works by air pressure? (a) a suction hook (b) a fridge magnet (c) a compass needle (d) a magnetic pin holder
12. 12.⚖️ 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
13. 13.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
14. 14.🔍 Which is the odd one out? (a) a medicine dropper (b) a drinking straw (c) a fridge magnet (d) a vacuum cleaner
15. 15.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
16. 16.⚖️ 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) whether the card stays
17. 17.⚖️ 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
18. 18.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a drinking straw (c) a magnetic pin holder (d) a suction hook
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 make it rain (d) to catch any spills
20. 20.True or false: a towel is not needed for the card-on-a-glass trick. (a) False (b) True
21. 21.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) False (b) True
22. 22.🔍 Which is the odd one out? (a) a magnetic chess set (b) a magnetic pin holder (c) a suction hook (d) a fridge magnet
23. 23.True or false: a bicycle pump works by air pressure. (a) False (b) True
24. 24.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
25. 25.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic pin holder (c) a compass needle (d) a vacuum cleaner
26. 26.⚖️ 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
27. 27.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) air inside pushes back (c) the cap is sticky (d) the bottle is magnetic
28. 28.⚖️ 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) whether the card stays (b) the same card (c) how full the glass is
29. 29.⚖️ 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
30. 30.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) smoke (c) sand (d) air
31. 31.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a mirror (b) a stiff postcard (c) a sink or a bucket (d) a towel
32. 32.🥛 Which of these works by magnetism? (a) a drinking straw (b) a medicine dropper (c) a fridge magnet (d) a bicycle pump
33. 33.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a glass of water (c) a battery cell (d) yeast
34. 34.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) on a bed (c) over a sink or bucket (d) near a plug point
35. 35.🧺 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 glass of water (d) a towel
36. 36.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a balloon (c) a battery cell (d) a towel
37. 37.True or false: a compass needle works by magnetism. (a) True (b) False
38. 38.True or false: yeast is needed for the card-on-a-glass trick. (a) True (b) False
39. 39.⚖️ 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 same glass (b) whether the card stays (c) how full the glass is
40. 40.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed

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