Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 318 · 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.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
2. 2.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a towel (c) a magnet (d) a glass of water
3. 3.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is the one thing we change. (a) True (b) False
4. 4.⚖️ 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
5. 5.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a magnetic chess set (c) a vacuum cleaner (d) a fridge magnet
6. 6.True or false: a magnetic chess set works by magnetism. (a) False (b) True
7. 7.🥛 Which of these works by magnetism? (a) a suction hook (b) a bicycle pump (c) a magnetic chess set (d) a vacuum cleaner
8. 8.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic pin holder (c) a fridge magnet (d) a suction hook
9. 9.🔍 Which is the odd one out? (a) a drinking straw (b) a vacuum cleaner (c) a magnetic chess set (d) a bicycle pump
10. 10.🔍 Which is the odd one out? (a) a fridge magnet (b) a magnetic chess set (c) a magnetic pin holder (d) a bicycle pump
11. 11.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) near a plug point (c) on a bed (d) over a sink or bucket
12. 12.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
13. 13.True or false: a suction hook works by magnetism. (a) True (b) False
14. 14.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) a stiff postcard (c) turmeric powder (d) a magnet
15. 15.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) sand (c) air (d) smoke
16. 16.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
17. 17.🔮 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) water is hiding there (d) the bottle is magnetic
18. 18.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
19. 19.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
20. 20.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) a magnet (c) turmeric powder (d) a glass of water
21. 21.⚖️ 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) whether the card stays (c) the way we turn it (d) how full the glass is
22. 22.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) True (b) False
23. 23.🧺 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 balloon
24. 24.⚖️ 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) whether the card stays (c) the same glass (d) the same card
25. 25.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is magnetic (b) juice likes plastic (c) air pushes it up (d) the straw is hot
26. 26.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a stiff postcard (c) a mirror (d) a glass of water
27. 27.⚖️ 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 measure it (b) we keep it the same (c) we change it
28. 28.True or false: a vacuum cleaner works by magnetism. (a) False (b) True
29. 29.True or false: a mirror is not needed for the card-on-a-glass trick. (a) False (b) True
30. 30.True or false: a towel is not needed for the card-on-a-glass trick. (a) False (b) True
31. 31.⚖️ 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 keep it the same (c) we change it
32. 32.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is what we measure. (a) False (b) True
33. 33.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is hotter (c) it is heavier (d) it will not break
34. 34.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
35. 35.⚖️ 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
36. 36.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
37. 37.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) a magnet (c) the cold water (d) air pushing up
38. 38.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is the one thing we change. (a) False (b) True
39. 39.True or false: a fridge magnet works by magnetism. (a) True (b) False
40. 40.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a medicine dropper (c) a suction hook (d) a compass needle

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