Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 873 · 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.🥛 Does a compass needle work by air pressure or by magnetism? (a) magnetism (b) air pressure
2. 2.🛟 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
3. 3.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) False (b) True
4. 4.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) air pushing up (c) glue on the card (d) a magnet
5. 5.🧺 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 stiff postcard
6. 6.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) air pressure (b) magnetism
7. 7.True or false: a magnetic chess set works by air pressure. (a) False (b) True
8. 8.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
9. 9.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to cool the glass (c) to catch any spills (d) to make it rain
10. 10.⚖️ 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 keep it the same (c) we change it
11. 11.🔍 Which is the odd one out? (a) a medicine dropper (b) a magnetic pin holder (c) a suction hook (d) a drinking straw
12. 12.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
13. 13.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
14. 14.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a balloon (c) a towel (d) turmeric powder
15. 15.⚖️ 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 measure it (b) we keep it the same (c) we change it
16. 16.⚖️ 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
17. 17.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card stays on (b) the glass breaks (c) the water turns to ice (d) the card flies away
18. 18.⚖️ 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
19. 19.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
20. 20.True or false: a vacuum cleaner works by magnetism. (a) True (b) False
21. 21.True or false: a medicine dropper works by magnetism. (a) False (b) True
22. 22.True or false: a towel is needed for the card-on-a-glass trick. (a) True (b) False
23. 23.🥛 Which of these works by air pressure? (a) a suction hook (b) a magnetic chess set (c) a compass needle (d) a magnetic pin holder
24. 24.🥛 Which of these works by magnetism? (a) a magnetic pin holder (b) a suction hook (c) a medicine dropper (d) a vacuum cleaner
25. 25.True or false: a glass of water is needed for the card-on-a-glass trick. (a) True (b) False
26. 26.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
27. 27.📘 Air presses on everything around us. What is this push called? (a) friction (b) magnetism (c) sunlight (d) air pressure
28. 28.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a magnet (c) a glass of water (d) a sink or a bucket
29. 29.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a magnet (c) a balloon (d) a stiff postcard
30. 30.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
31. 31.True or false: a suction hook works by air pressure. (a) False (b) True
32. 32.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
33. 33.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) the bottle is magnetic (c) water is hiding there (d) the cap is sticky
34. 34.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a stiff postcard (c) a glass of water (d) a balloon
35. 35.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
36. 36.⚖️ 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) True (b) False
37. 37.True or false: a balloon is needed for the card-on-a-glass trick. (a) True (b) False
38. 38.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
39. 39.True or false: yeast is not needed for the card-on-a-glass trick. (a) False (b) True
40. 40.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a drinking straw (c) a suction hook (d) a compass needle

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