Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 700 · 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 compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
2. 2.🥛 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
3. 3.🥛 Which of these works by air pressure? (a) a vacuum cleaner (b) a compass needle (c) a magnetic chess set (d) a magnetic pin holder
4. 4.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
5. 5.🔮 Why do we try the card trick over a sink or a bucket? (a) to catch any spills (b) to grow plants (c) to make it rain (d) to cool the glass
6. 6.True or false: a glass of water is needed for the card-on-a-glass trick. (a) True (b) False
7. 7.🧺 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 balloon (c) a towel (d) a glass of water
8. 8.⚖️ 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
9. 9.True or false: a medicine dropper works by magnetism. (a) True (b) False
10. 10.⚖️ 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 keep it the same (b) we measure it (c) we change it
11. 11.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
12. 12.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) the cap is sticky (c) the bottle is magnetic (d) water is hiding there
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 change it (b) we keep it the same (c) we measure it
14. 14.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
15. 15.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a towel (c) a stiff postcard (d) turmeric powder
16. 16.⚖️ 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
17. 17.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
18. 18.🥤 Why does juice go up a drinking straw when you sip? (a) air pushes it up (b) the straw is magnetic (c) juice likes plastic (d) the straw is hot
19. 19.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) magnetism (b) air pressure
20. 20.🥛 Why is it best to fill the glass right to the top? (a) little air left inside (b) it looks nicer (c) the card gets wet (d) water is heavier
21. 21.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) air pressure (b) magnetism
22. 22.⚖️ 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 change it (c) we measure it
23. 23.⚖️ 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
24. 24.🧺 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 towel (c) yeast (d) a stiff postcard
25. 25.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a stiff postcard (c) a sink or a bucket (d) a mirror
26. 26.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) water (c) smoke (d) air
27. 27.🔍 Which is the odd one out? (a) a drinking straw (b) a suction hook (c) a medicine dropper (d) a magnetic pin holder
28. 28.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic pin holder (c) a medicine dropper (d) a magnetic chess set
29. 29.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
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) whether the card stays (b) how full the glass is (c) the way we turn it (d) the same glass
31. 31.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
32. 32.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
33. 33.⚖️ 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
34. 34.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) on a bed (c) near a plug point (d) over a sink or bucket
35. 35.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) False (b) True
36. 36.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a magnetic pin holder (c) a bicycle pump (d) a medicine dropper
37. 37.🧺 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) a sink or a bucket (d) turmeric powder
38. 38.🛟 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 magnetic (d) it is heavier
39. 39.⚖️ 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 card
40. 40.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed

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