Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 514 · 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 drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
2. 2.⚖️ 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
3. 3.🔍 Which is the odd one out? (a) a drinking straw (b) a suction hook (c) a magnetic chess set (d) a bicycle pump
4. 4.⚖️ 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) whether the card stays (c) how full the glass is (d) the same card
5. 5.🧺 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 stiff postcard (c) a towel (d) a battery cell
6. 6.True or false: yeast is needed for the card-on-a-glass trick. (a) False (b) True
7. 7.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) water is hiding there (c) the cap is sticky (d) air inside pushes back
8. 8.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) yeast (c) a towel (d) a balloon
9. 9.⚖️ 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 same glass (c) whether the card stays (d) how full the glass is
10. 10.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it will not break (c) it is hotter (d) it is heavier
11. 11.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
12. 12.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) True (b) False
13. 13.⚖️ 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 keep it the same (b) we change it (c) we measure it
14. 14.⚖️ 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 change it (b) we keep it the same (c) we measure it
15. 15.True or false: yeast is not needed for the card-on-a-glass trick. (a) True (b) False
16. 16.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) little air left inside (c) it looks nicer (d) the card gets wet
17. 17.True or false: a magnet is not needed for the card-on-a-glass trick. (a) True (b) False
18. 18.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
19. 19.⚖️ 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
20. 20.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a bicycle pump (c) a magnetic chess set (d) a fridge magnet
21. 21.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) smoke (c) sand (d) air
22. 22.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a glass of water (c) a magnet (d) a mirror
23. 23.🥛 Which of these works by air pressure? (a) a medicine dropper (b) a magnetic pin holder (c) a compass needle (d) a fridge magnet
24. 24.True or false: a compass needle works by air pressure. (a) True (b) False
25. 25.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic chess set (c) a medicine dropper (d) a fridge magnet
26. 26.🔍 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 card flies away (c) the water turns to ice (d) the glass breaks
27. 27.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
28. 28.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to grow plants (c) to catch any spills (d) to make it rain
29. 29.⚖️ 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) True (b) False
30. 30.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a mirror (c) turmeric powder (d) a stiff postcard
31. 31.🥛 Which of these works by magnetism? (a) a suction hook (b) a bicycle pump (c) a magnetic pin holder (d) a medicine dropper
32. 32.True or false: a towel is not needed for the card-on-a-glass trick. (a) True (b) False
33. 33.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) the cold water (c) a magnet (d) air pushing up
34. 34.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a fridge magnet (c) a compass needle (d) a drinking straw
35. 35.⚖️ 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 kept the same. (a) True (b) False
36. 36.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a suction hook (c) a magnetic pin holder (d) a compass needle
37. 37.⚖️ 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 measure it (c) we keep it the same
38. 38.🔍 Which is the odd one out? (a) a magnetic chess set (b) a vacuum cleaner (c) a fridge magnet (d) a magnetic pin holder
39. 39.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
40. 40.🧺 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

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