Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 442 · 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.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic pin holder (c) a magnetic chess set (d) a suction hook
2. 2.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a balloon (c) yeast (d) a sink or a bucket
3. 3.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) water is hiding there (c) the bottle is magnetic (d) air inside pushes back
4. 4.🧺 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 magnet (c) a towel (d) a glass of water
5. 5.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is magnetic (c) it will not break (d) it is hotter
6. 6.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) the cold water (c) air pushing up (d) glue on the card
7. 7.True or false: a magnetic chess set works by air pressure. (a) True (b) False
8. 8.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a suction hook (c) a medicine dropper (d) a fridge magnet
9. 9.True or false: a towel is not needed for the card-on-a-glass trick. (a) True (b) False
10. 10.True or false: a balloon is not needed for the card-on-a-glass trick. (a) True (b) False
11. 11.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
12. 12.🔍 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
13. 13.🧺 Do we need a stiff postcard 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 the one thing we change. (a) False (b) True
15. 15.True or false: a vacuum cleaner works by magnetism. (a) False (b) True
16. 16.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a towel (c) a stiff postcard (d) yeast
17. 17.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the way we turn it”? (a) we keep it the same (b) we change it (c) we measure it
18. 18.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a mirror (b) a glass of water (c) a sink or a bucket (d) a stiff postcard
19. 19.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
20. 20.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) near a plug point (c) over a sink or bucket (d) on a bed
21. 21.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a battery cell (c) a stiff postcard (d) a sink or a bucket
22. 22.🧺 Which of these is not needed for the card-on-a-glass trick? (a) yeast (b) a stiff postcard (c) a towel (d) a sink or a bucket
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 stiff postcard (c) a towel (d) turmeric powder
24. 24.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) air (c) water (d) smoke
25. 25.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure
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 card”? (a) we keep it the same (b) we change it (c) we measure it
27. 27.⚖️ 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 kept the same. (a) False (b) True
28. 28.🧺 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 glass of water
29. 29.True or false: a fridge magnet works by magnetism. (a) False (b) True
30. 30.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
31. 31.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a glass of water (c) a magnet (d) a battery cell
32. 32.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a towel (c) a glass of water (d) a magnet
33. 33.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a towel (c) a magnet (d) a mirror
34. 34.🔮 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
35. 35.🧺 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 balloon (d) a sink or a bucket
36. 36.🥛 Does a compass needle work by air pressure or by magnetism? (a) magnetism (b) air pressure
37. 37.True or false: a suction hook works by air pressure. (a) False (b) True
38. 38.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
39. 39.True or false: a towel is needed for the card-on-a-glass trick. (a) False (b) True
40. 40.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism

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