Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 501 · 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.🧺 Which of these is needed for the card-on-a-glass trick? (a) a towel (b) turmeric powder (c) a battery cell (d) a mirror
2. 2.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
3. 3.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
4. 4.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to cool the glass (c) to make it rain (d) to catch any spills
5. 5.⚖️ 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 same glass (b) the way we turn it (c) whether the card stays (d) how full the glass is
6. 6.⚖️ 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 card
7. 7.True or false: a compass needle works by air pressure. (a) True (b) False
8. 8.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
9. 9.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) yeast (c) a sink or a bucket (d) a glass of water
10. 10.⚖️ 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
11. 11.🥛 Why is it best to fill the glass right to the top? (a) it looks nicer (b) little air left inside (c) the card gets wet (d) water is heavier
12. 12.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a suction hook (c) a drinking straw (d) a magnetic chess set
13. 13.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
14. 14.⚖️ 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
15. 15.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
16. 16.🔍 Which is the odd one out? (a) a fridge magnet (b) a bicycle pump (c) a drinking straw (d) a vacuum cleaner
17. 17.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a drinking straw (c) a magnetic pin holder (d) a medicine dropper
18. 18.True or false: yeast is not needed for the card-on-a-glass trick. (a) False (b) True
19. 19.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a balloon (c) a glass of water (d) a stiff postcard
20. 20.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is what we measure. (a) False (b) True
21. 21.⚖️ 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 change it (c) we measure it
22. 22.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a mirror (c) a sink or a bucket (d) a glass of water
23. 23.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a compass needle (c) a fridge magnet (d) a bicycle pump
24. 24.🛟 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
25. 25.⚖️ 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 what we measure. (a) True (b) False
26. 26.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a sink or a bucket (c) a towel (d) turmeric powder
27. 27.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure
28. 28.🔍 Which is the odd one out? (a) a drinking straw (b) a bicycle pump (c) a magnetic chess set (d) a vacuum cleaner
29. 29.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
30. 30.🧺 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 balloon (d) a sink or a bucket
31. 31.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a compass needle (c) a fridge magnet (d) a suction hook
32. 32.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
33. 33.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) the straw is magnetic (c) juice likes plastic (d) air pushes it up
34. 34.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a stiff postcard (c) a magnet (d) a towel
35. 35.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) the bottle is magnetic (c) air inside pushes back (d) the cap is sticky
36. 36.True or false: a suction hook works by magnetism. (a) True (b) False
37. 37.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) air pressure (b) magnetism
38. 38.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic chess set (c) a magnetic pin holder (d) a medicine dropper
39. 39.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the card flies away (c) the water turns to ice (d) the card stays on
40. 40.True or false: a medicine dropper works by magnetism. (a) False (b) True

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