Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 792 · 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 stiff postcard (b) a towel (c) a battery cell (d) a sink or a bucket
2. 2.⚖️ 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
3. 3.⚖️ 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
4. 4.True or false: a fridge magnet works by magnetism. (a) True (b) False
5. 5.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a compass needle (c) a magnetic chess set (d) a suction hook
6. 6.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “whether the card stays”? (a) we keep it the same (b) we measure it (c) we change it
7. 7.True or false: a magnetic chess set works by magnetism. (a) True (b) False
8. 8.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to grow plants (c) to catch any spills (d) to cool the glass
9. 9.⚖️ 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) False (b) True
10. 10.⚖️ 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) whether the card stays (b) the way we turn it (c) how full the glass is (d) the same glass
11. 11.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) water is hiding there (c) the bottle is magnetic (d) the cap is sticky
12. 12.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) turmeric powder (c) a glass of water (d) a sink or a bucket
13. 13.⚖️ 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) True (b) False
14. 14.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is magnetic (c) it is hotter (d) it will not break
15. 15.⚖️ 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) how full the glass is (b) whether the card stays (c) the same card (d) the way we turn it
16. 16.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) near a plug point (c) over a sink or bucket (d) on a bed
17. 17.True or false: a drinking straw works by air pressure. (a) True (b) False
18. 18.🔍 Which is the odd one out? (a) a medicine dropper (b) a compass needle (c) a magnetic pin holder (d) a fridge magnet
19. 19.True or false: yeast is not needed for the card-on-a-glass trick. (a) True (b) False
20. 20.🥛 Which of these works by magnetism? (a) a drinking straw (b) a vacuum cleaner (c) a magnetic pin holder (d) a bicycle pump
21. 21.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
22. 22.True or false: a towel is needed for the card-on-a-glass trick. (a) False (b) True
23. 23.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a balloon (c) a glass of water (d) a sink or a bucket
24. 24.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a balloon (c) a glass of water (d) turmeric powder
25. 25.🥛 Which of these works by magnetism? (a) a compass needle (b) a bicycle pump (c) a drinking straw (d) a vacuum cleaner
26. 26.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a suction hook (c) a magnetic chess set (d) a bicycle pump
27. 27.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) air pressure (b) magnetism
28. 28.True or false: a vacuum cleaner works by air pressure. (a) False (b) True
29. 29.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
30. 30.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
31. 31.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
32. 32.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) air (c) sand (d) smoke
33. 33.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
34. 34.🔍 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 card stays on (c) the glass breaks (d) the water turns to ice
35. 35.⚖️ 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 kept the same. (a) True (b) False
36. 36.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic chess set (c) a medicine dropper (d) a magnetic pin holder
37. 37.🥛 Why is it best to fill the glass right to the top? (a) it looks nicer (b) water is heavier (c) little air left inside (d) the card gets wet
38. 38.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
39. 39.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
40. 40.True or false: a drinking straw works by magnetism. (a) True (b) False

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