Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 938 · 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.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
2. 2.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) it looks nicer (c) little air left inside (d) the card gets wet
3. 3.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a fridge magnet (c) a suction hook (d) a drinking straw
4. 4.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a magnet (b) a glass of water (c) a sink or a bucket (d) a stiff postcard
5. 5.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
6. 6.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
7. 7.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) air pushes it up (c) juice likes plastic (d) the straw is magnetic
8. 8.🔍 Which is the odd one out? (a) a magnetic chess set (b) a compass needle (c) a fridge magnet (d) a medicine dropper
9. 9.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) magnetism (b) air pressure
10. 10.True or false: a fridge magnet works by magnetism. (a) False (b) True
11. 11.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
12. 12.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a battery cell (c) a stiff postcard (d) a balloon
13. 13.🥛 Which of these works by magnetism? (a) a suction hook (b) a medicine dropper (c) a drinking straw (d) a compass needle
14. 14.True or false: a magnet is not needed for the card-on-a-glass trick. (a) True (b) False
15. 15.True or false: yeast is needed for the card-on-a-glass trick. (a) True (b) False
16. 16.True or false: a towel is not needed for the card-on-a-glass trick. (a) True (b) False
17. 17.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
18. 18.🧺 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) yeast (d) a towel
19. 19.⚖️ 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 change it (c) we keep it the same
20. 20.🥛 Does a compass needle work by air pressure or by magnetism? (a) magnetism (b) air pressure
21. 21.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) air pressure (b) magnetism
22. 22.True or false: a medicine dropper works by air pressure. (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 magnet (b) a glass of water (c) a stiff postcard (d) a sink or a bucket
24. 24.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is kept the same. (a) True (b) False
25. 25.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
26. 26.🔮 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
27. 27.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
28. 28.🥛 Which of these works by air pressure? (a) a compass needle (b) a bicycle pump (c) a magnetic chess set (d) a fridge magnet
29. 29.⚖️ 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
30. 30.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a sink or a bucket (c) a mirror (d) a glass of water
31. 31.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a compass needle (c) a drinking straw (d) a fridge magnet
32. 32.⚖️ 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
33. 33.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it will not break (c) it is heavier (d) it is magnetic
34. 34.⚖️ 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
35. 35.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
36. 36.True or false: a bicycle pump works by magnetism. (a) True (b) False
37. 37.⚖️ 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 change it (c) we measure it
38. 38.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a balloon (c) a stiff postcard (d) a glass of water
39. 39.🔮 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) air inside pushes back (d) the cap is sticky
40. 40.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the water turns to ice (c) the card stays on (d) the card flies away

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