Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 670 · 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 blow up a balloon. What fills it? (a) water (b) air (c) smoke (d) sand
2. 2.⚖️ 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) how full the glass is (c) the same glass (d) whether the card stays
3. 3.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) near a plug point (c) over a laptop (d) over a sink or bucket
4. 4.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
5. 5.True or false: yeast is not needed for the card-on-a-glass trick. (a) True (b) False
6. 6.⚖️ 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 keep it the same (b) we measure it (c) we change it
7. 7.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is magnetic (b) juice likes plastic (c) the straw is hot (d) air pushes it up
8. 8.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a balloon (b) a glass of water (c) a towel (d) a stiff postcard
9. 9.⚖️ 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) whether the card stays (b) the same glass (c) how full the glass is (d) the same card
10. 10.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is magnetic (c) it will not break (d) it is heavier
11. 11.🥛 Which of these works by air pressure? (a) a compass needle (b) a magnetic chess set (c) a drinking straw (d) a fridge magnet
12. 12.🔍 Which is the odd one out? (a) a magnetic chess set (b) a compass needle (c) a suction hook (d) a fridge magnet
13. 13.🔍 Which is the odd one out? (a) a suction hook (b) a vacuum cleaner (c) a medicine dropper (d) a compass needle
14. 14.⚖️ 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
15. 15.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) the cold water (c) air pushing up (d) glue on the card
16. 16.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure
17. 17.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to make it rain (c) to catch any spills (d) to grow plants
18. 18.True or false: a magnetic chess set works by air pressure. (a) False (b) True
19. 19.⚖️ 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) the way we turn it (b) whether the card stays (c) how full the glass is
20. 20.⚖️ 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 measure it (b) we change it (c) we keep it the same
21. 21.True or false: a battery cell is needed for the card-on-a-glass trick. (a) False (b) True
22. 22.🧺 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 sink or a bucket (d) a glass of water
23. 23.True or false: a magnetic pin holder works by magnetism. (a) False (b) True
24. 24.⚖️ 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 measure it (b) we change it (c) we keep it the same
25. 25.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
26. 26.⚖️ 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 what we measure. (a) False (b) True
27. 27.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) the cap is sticky (c) water is hiding there (d) air inside pushes back
28. 28.⚖️ 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
29. 29.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
30. 30.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a mirror (c) turmeric powder (d) a glass of water
31. 31.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a balloon (c) yeast (d) a sink or a bucket
32. 32.🧺 Which of these is not needed for the card-on-a-glass trick? (a) turmeric powder (b) a sink or a bucket (c) a glass of water (d) a stiff postcard
33. 33.🔍 Which is the odd one out? (a) a fridge magnet (b) a compass needle (c) a magnetic pin holder (d) a drinking straw
34. 34.⚖️ 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
35. 35.🔍 Which is the odd one out? (a) a medicine dropper (b) a drinking straw (c) a magnetic chess set (d) a vacuum cleaner
36. 36.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) magnetism (b) air pressure
37. 37.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) False (b) True
38. 38.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
39. 39.⚖️ 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
40. 40.True or false: a mirror is not needed for the card-on-a-glass trick. (a) True (b) False

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