Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 726 · 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 is the odd one out? (a) a bicycle pump (b) a suction hook (c) a fridge magnet (d) a drinking straw
2. 2.⚖️ 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 the one thing we change. (a) False (b) True
3. 3.🛟 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
4. 4.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
5. 5.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) False (b) True
6. 6.⚖️ 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 measure it (b) we keep it the same (c) we change it
7. 7.True or false: a drinking straw works by magnetism. (a) True (b) False
8. 8.🔍 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 flies away (d) the card stays on
9. 9.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is kept the same. (a) True (b) False
10. 10.⚖️ 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) the same card (b) how full the glass is (c) the way we turn it (d) whether the card stays
11. 11.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) a mirror (c) a towel (d) yeast
12. 12.True or false: a vacuum cleaner works by magnetism. (a) True (b) False
13. 13.🧺 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 stiff postcard (c) a magnet (d) a glass of water
14. 14.⚖️ 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 same glass (b) how full the glass is (c) whether the card stays
15. 15.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a sink or a bucket (c) a glass of water (d) turmeric powder
16. 16.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to grow plants (c) to catch any spills (d) to cool the glass
17. 17.⚖️ 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) whether the card stays (c) the same glass (d) how full the glass is
18. 18.🔍 Which is the odd one out? (a) a medicine dropper (b) a magnetic pin holder (c) a magnetic chess set (d) a fridge magnet
19. 19.🥛 Which of these works by magnetism? (a) a suction hook (b) a magnetic pin holder (c) a medicine dropper (d) a bicycle pump
20. 20.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
21. 21.🔮 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) the bottle is magnetic (d) air inside pushes back
22. 22.🧺 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 stiff postcard
23. 23.True or false: yeast is needed for the card-on-a-glass trick. (a) True (b) False
24. 24.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
25. 25.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) glue on the card (c) a magnet (d) air pushing up
26. 26.⚖️ 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 change it (b) we measure it (c) we keep it the same
27. 27.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
28. 28.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
29. 29.True or false: a battery cell is needed for the card-on-a-glass trick. (a) True (b) False
30. 30.🔍 Which is the odd one out? (a) a fridge magnet (b) a magnetic chess set (c) a magnetic pin holder (d) a suction hook
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 keep it the same (b) we measure it (c) we change it
32. 32.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a stiff postcard (c) a battery cell (d) yeast
33. 33.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
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 towel (d) a battery cell
35. 35.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
36. 36.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) air pressure (b) magnetism
37. 37.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a glass of water (c) turmeric powder (d) a mirror
38. 38.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
39. 39.⚖️ 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
40. 40.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is heavier (c) it is hotter (d) it will not break

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