Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 481 · 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 mirror is needed for the card-on-a-glass trick. (a) True (b) False
2. 2.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) water is heavier (c) little air left inside (d) it looks nicer
3. 3.True or false: a bicycle pump works by air pressure. (a) False (b) True
4. 4.⚖️ 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 change it (b) we keep it the same (c) we measure it
5. 5.True or false: a medicine dropper works by air pressure. (a) True (b) False
6. 6.⚖️ 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 keep it the same (b) we change it (c) we measure it
7. 7.True or false: yeast is needed for the card-on-a-glass trick. (a) True (b) False
8. 8.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a towel (c) a sink or a bucket (d) a balloon
9. 9.True or false: a bicycle pump works by magnetism. (a) True (b) False
10. 10.True or false: a magnet is not needed for the card-on-a-glass trick. (a) True (b) False
11. 11.True or false: a magnetic pin holder works by air pressure. (a) True (b) False
12. 12.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic pin holder (c) a vacuum cleaner (d) a compass needle
13. 13.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a magnet (b) a towel (c) a stiff postcard (d) a sink or a bucket
14. 14.True or false: a fridge magnet works by magnetism. (a) False (b) True
15. 15.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
16. 16.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is heavier (c) it will not break (d) it is hotter
17. 17.True or false: a suction hook works by magnetism. (a) False (b) True
18. 18.📘 Air presses on everything around us. What is this push called? (a) sunlight (b) friction (c) air pressure (d) magnetism
19. 19.⚖️ 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 same glass
20. 20.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a glass of water (c) a mirror (d) a magnet
21. 21.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a fridge magnet (c) a bicycle pump (d) a suction hook
22. 22.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
23. 23.🥛 Which of these works by air pressure? (a) a suction hook (b) a magnetic chess set (c) a compass needle (d) a fridge magnet
24. 24.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) the bottle is magnetic (c) water is hiding there (d) air inside pushes back
25. 25.🔍 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 stays on (c) the water turns to ice (d) the card flies away
26. 26.🧺 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 mirror (d) a towel
27. 27.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to cool the glass (c) to grow plants (d) to catch any spills
28. 28.🥛 Does a compass needle work by air pressure or by magnetism? (a) magnetism (b) air pressure
29. 29.🔍 Which is the odd one out? (a) a drinking straw (b) a suction hook (c) a medicine dropper (d) a magnetic pin holder
30. 30.True or false: a fridge magnet works by air pressure. (a) False (b) True
31. 31.🥛 Which of these works by magnetism? (a) a drinking straw (b) a suction hook (c) a magnetic chess set (d) a vacuum cleaner
32. 32.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
33. 33.⚖️ 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
34. 34.🥛 Which of these works by air pressure? (a) a bicycle pump (b) a fridge magnet (c) a magnetic pin holder (d) a magnetic chess set
35. 35.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
36. 36.🥛 Which of these works by magnetism? (a) a drinking straw (b) a suction hook (c) a compass needle (d) a bicycle pump
37. 37.⚖️ 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) the same card (b) the way we turn it (c) whether the card stays (d) the same glass
38. 38.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) a magnet (c) glue on the card (d) air pushing up
39. 39.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a stiff postcard (c) a glass of water (d) turmeric powder
40. 40.True or false: a battery cell is needed for the card-on-a-glass trick. (a) False (b) True

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