Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 721 · 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.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) yeast (c) a towel (d) a sink or a bucket
2. 2.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a compass needle (c) a drinking straw (d) a magnetic pin holder
3. 3.True or false: a compass needle works by magnetism. (a) False (b) True
4. 4.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
5. 5.🧺 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) turmeric powder (d) a stiff postcard
6. 6.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
7. 7.🥛 Why is it best to fill the glass right to the top? (a) it looks nicer (b) little air left inside (c) the card gets wet (d) water is heavier
8. 8.⚖️ 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 glass (c) whether the card stays
9. 9.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a fridge magnet (c) a magnetic chess set (d) a bicycle pump
10. 10.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
11. 11.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
12. 12.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) yeast (c) a battery cell (d) a towel
13. 13.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
14. 14.⚖️ 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
15. 15.⚖️ 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
16. 16.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: how full the glass is is the one thing we change. (a) False (b) True
17. 17.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to make it rain (c) to catch any spills (d) to cool the glass
18. 18.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) over a laptop (c) over a sink or bucket (d) near a plug point
19. 19.True or false: yeast is needed for the card-on-a-glass trick. (a) False (b) True
20. 20.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
21. 21.True or false: a vacuum cleaner works by air pressure. (a) False (b) True
22. 22.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is hotter (c) it is magnetic (d) it will not break
23. 23.🧺 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 stiff postcard (d) a towel
24. 24.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) True (b) False
25. 25.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a suction hook (c) a magnetic pin holder (d) a medicine dropper
26. 26.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a magnetic chess set (c) a fridge magnet (d) a vacuum cleaner
27. 27.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
28. 28.🔍 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
29. 29.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a glass of water (c) a battery cell (d) a sink or a bucket
30. 30.⚖️ 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 keep it the same (c) we measure it
31. 31.🥛 Which of these works by magnetism? (a) a drinking straw (b) a magnetic chess set (c) a vacuum cleaner (d) a suction hook
32. 32.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) a mirror (c) a glass of water (d) a balloon
33. 33.🥛 Which of these works by magnetism? (a) a drinking straw (b) a fridge magnet (c) a medicine dropper (d) a suction hook
34. 34.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
35. 35.True or false: a mirror is needed for the card-on-a-glass trick. (a) True (b) False
36. 36.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) sand (c) water (d) smoke
37. 37.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
38. 38.🔮 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 bottle is magnetic (d) the cap is sticky
39. 39.True or false: a compass needle works by air pressure. (a) True (b) False
40. 40.True or false: a towel is needed for the card-on-a-glass trick. (a) False (b) True

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