Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 414 · 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 works by air pressure? (a) a compass needle (b) a magnetic chess set (c) a drinking straw (d) a magnetic pin holder
2. 2.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
3. 3.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) False (b) True
4. 4.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
5. 5.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
6. 6.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a bicycle pump (c) a drinking straw (d) a compass needle
7. 7.True or false: yeast is needed for the card-on-a-glass trick. (a) False (b) True
8. 8.⚖️ 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
9. 9.🧺 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 stiff postcard (d) a mirror
10. 10.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) water (c) air (d) smoke
11. 11.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) the cap is sticky (c) air inside pushes back (d) the bottle is magnetic
12. 12.⚖️ 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) how full the glass is (b) the same glass (c) whether the card stays (d) the same card
13. 13.⚖️ 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
14. 14.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a sink or a bucket (c) a stiff postcard (d) yeast
15. 15.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a compass needle (c) a magnetic pin holder (d) a suction hook
16. 16.True or false: a medicine dropper works by magnetism. (a) True (b) False
17. 17.⚖️ 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
18. 18.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) yeast (b) a towel (c) a stiff postcard (d) a sink or a bucket
19. 19.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a magnet (c) a battery cell (d) a glass of water
20. 20.🧺 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 balloon (d) a sink or a bucket
21. 21.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
22. 22.🧺 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 glass of water (c) a battery cell (d) a towel
23. 23.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a sink or a bucket (c) turmeric powder (d) a magnet
24. 24.True or false: a balloon is not needed for the card-on-a-glass trick. (a) False (b) True
25. 25.True or false: a drinking straw works by air pressure. (a) False (b) True
26. 26.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it will not break (c) it is hotter (d) it is magnetic
27. 27.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card stays on (b) the card flies away (c) the glass breaks (d) the water turns to ice
28. 28.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
29. 29.True or false: a compass needle works by magnetism. (a) True (b) False
30. 30.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a towel (c) a glass of water (d) a balloon
31. 31.True or false: a mirror is not needed for the card-on-a-glass trick. (a) True (b) False
32. 32.True or false: a vacuum cleaner works by magnetism. (a) True (b) False
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 kept the same. (a) True (b) False
34. 34.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) the cold water (c) air pushing up (d) a magnet
35. 35.🥛 Which of these works by magnetism? (a) a drinking straw (b) a bicycle pump (c) a suction hook (d) a fridge magnet
36. 36.🔍 Which is the odd one out? (a) a magnetic chess set (b) a vacuum cleaner (c) a magnetic pin holder (d) a fridge magnet
37. 37.True or false: a balloon is needed for the card-on-a-glass trick. (a) False (b) True
38. 38.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
39. 39.🥤 Why does juice go up a drinking straw when you sip? (a) air pushes it up (b) the straw is hot (c) juice likes plastic (d) the straw is magnetic
40. 40.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same card”? (a) we change it (b) we measure it (c) we keep it the same

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