Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 374 · 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.⚖️ 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 measure it (c) we keep it the same
2. 2.True or false: a towel is needed for the card-on-a-glass trick. (a) True (b) False
3. 3.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) over a laptop (c) near a plug point (d) over a sink or bucket
4. 4.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a mirror (c) a sink or a bucket (d) a glass of water
5. 5.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is heavier (c) it will not break (d) it is hotter
6. 6.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a magnet (c) a towel (d) yeast
7. 7.True or false: a drinking straw works by air pressure. (a) False (b) True
8. 8.🥤 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
9. 9.True or false: a magnetic pin holder works by magnetism. (a) False (b) True
10. 10.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) water (c) sand (d) smoke
11. 11.⚖️ 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) the same card (c) whether the card stays (d) how full the glass is
12. 12.🥛 Which of these works by air pressure? (a) a vacuum cleaner (b) a magnetic pin holder (c) a fridge magnet (d) a compass needle
13. 13.True or false: yeast is needed for the card-on-a-glass trick. (a) False (b) True
14. 14.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) water is hiding there (c) air inside pushes back (d) the bottle is magnetic
15. 15.⚖️ 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
16. 16.🧺 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) a battery cell (d) a stiff postcard
17. 17.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a towel (c) turmeric powder (d) a stiff postcard
18. 18.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
19. 19.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a glass of water (c) a stiff postcard (d) yeast
20. 20.🔍 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
21. 21.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a sink or a bucket (c) a magnet (d) a mirror
22. 22.🔍 Which is the odd one out? (a) a medicine dropper (b) a magnetic pin holder (c) a bicycle pump (d) a drinking straw
23. 23.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) True (b) False
24. 24.🔍 Which is the odd one out? (a) a magnetic chess set (b) a vacuum cleaner (c) a suction hook (d) a bicycle pump
25. 25.⚖️ 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 way we turn it (c) how full the glass is (d) the same card
26. 26.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
27. 27.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
28. 28.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
29. 29.🧺 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
30. 30.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
31. 31.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
32. 32.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a glass of water (c) a magnet (d) a sink or a bucket
33. 33.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a compass needle (c) a drinking straw (d) a suction hook
34. 34.🥛 Which of these works by air pressure? (a) a bicycle pump (b) a magnetic chess set (c) a fridge magnet (d) a compass needle
35. 35.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a towel (c) a balloon (d) a sink or a bucket
36. 36.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a glass of water (c) a mirror (d) a battery cell
37. 37.True or false: a compass needle works by magnetism. (a) False (b) True
38. 38.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a glass of water (c) a balloon (d) a towel
39. 39.🔍 Which is the odd one out? (a) a magnetic chess set (b) a compass needle (c) a magnetic pin holder (d) a suction hook
40. 40.🥛 Which of these works by air pressure? (a) a drinking straw (b) a magnetic pin holder (c) a fridge magnet (d) a magnetic chess set

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