Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 307 · 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.🔮 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
2. 2.True or false: a mirror is not needed for the card-on-a-glass trick. (a) False (b) True
3. 3.True or false: a balloon is needed for the card-on-a-glass trick. (a) False (b) True
4. 4.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a drinking straw (c) a medicine dropper (d) a magnetic chess set
5. 5.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
6. 6.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) yeast (c) a magnet (d) a towel
7. 7.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
8. 8.⚖️ 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 measure it (c) we change it
9. 9.⚖️ 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 measure it (c) we change it
10. 10.⚖️ 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) how full the glass is (c) the same glass
11. 11.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
12. 12.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) smoke (c) air (d) sand
13. 13.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a fridge magnet (c) a bicycle pump (d) a suction hook
14. 14.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a sink or a bucket (c) yeast (d) turmeric powder
15. 15.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) yeast (c) a magnet (d) a stiff postcard
16. 16.True or false: a bicycle pump works by magnetism. (a) True (b) False
17. 17.🔍 Which is the odd one out? (a) a suction hook (b) a fridge magnet (c) a compass needle (d) a magnetic chess set
18. 18.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a drinking straw (c) a vacuum cleaner (d) a fridge magnet
19. 19.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) turmeric powder (c) a mirror (d) a glass of water
20. 20.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
21. 21.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a glass of water (c) a magnet (d) a stiff postcard
22. 22.🔮 Why do we try the card trick over a sink or a bucket? (a) to catch any spills (b) to make it rain (c) to cool the glass (d) to grow plants
23. 23.🔍 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 water turns to ice (c) the card stays on (d) the glass breaks
24. 24.⚖️ 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 way we turn it (b) the same glass (c) whether the card stays (d) how full the glass is
25. 25.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
26. 26.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
27. 27.True or false: yeast is needed for the card-on-a-glass trick. (a) False (b) True
28. 28.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
29. 29.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) water is heavier (c) it looks nicer (d) little air left inside
30. 30.⚖️ 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) the way we turn it (d) how full the glass is
31. 31.True or false: a battery cell is needed for the card-on-a-glass trick. (a) True (b) False
32. 32.⚖️ 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
33. 33.🧺 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) turmeric powder (d) a glass of water
34. 34.🛟 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
35. 35.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
36. 36.True or false: a compass needle works by air pressure. (a) True (b) False
37. 37.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a magnet (b) a glass of water (c) a stiff postcard (d) a sink or a bucket
38. 38.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a compass needle (c) a magnetic pin holder (d) a drinking straw
39. 39.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
40. 40.True or false: a drinking straw works by magnetism. (a) False (b) True

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