Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 765 · 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.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to catch any spills (c) to make it rain (d) to grow plants
2. 2.⚖️ 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 same card (c) whether the card stays (d) how full the glass is
3. 3.🧺 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 stiff postcard (d) a magnet
4. 4.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is kept the same. (a) False (b) True
5. 5.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) over a laptop (c) over a sink or bucket (d) on a bed
6. 6.True or false: a mirror is not needed for the card-on-a-glass trick. (a) False (b) True
7. 7.⚖️ 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 same glass (c) the same card (d) how full the glass is
8. 8.True or false: a magnet is not needed for the card-on-a-glass trick. (a) True (b) False
9. 9.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) True (b) False
10. 10.🔍 Which is the odd one out? (a) a suction hook (b) a drinking straw (c) a bicycle pump (d) a magnetic pin holder
11. 11.⚖️ 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) True (b) False
12. 12.🔮 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
13. 13.🧺 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 mirror (d) a towel
14. 14.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a sink or a bucket (b) turmeric powder (c) a glass of water (d) a towel
15. 15.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) False (b) True
16. 16.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
17. 17.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card flies away (b) the water turns to ice (c) the card stays on (d) the glass breaks
18. 18.⚖️ 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 the one thing we change. (a) False (b) True
19. 19.🥛 Which of these works by magnetism? (a) a suction hook (b) a magnetic pin holder (c) a medicine dropper (d) a drinking straw
20. 20.🧺 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 towel
21. 21.🥛 Which of these works by air pressure? (a) a medicine dropper (b) a fridge magnet (c) a compass needle (d) a magnetic pin holder
22. 22.🛟 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
23. 23.📘 Air presses on everything around us. What is this push called? (a) sunlight (b) magnetism (c) air pressure (d) friction
24. 24.🔍 Which is the odd one out? (a) a medicine dropper (b) a fridge magnet (c) a drinking straw (d) a suction hook
25. 25.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
26. 26.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
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 card”? (a) we keep it the same (b) we measure it (c) we change it
28. 28.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) air pressure (b) magnetism
29. 29.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
30. 30.🔍 Which is the odd one out? (a) a compass needle (b) a fridge magnet (c) a vacuum cleaner (d) a magnetic chess set
31. 31.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a suction hook (c) a magnetic chess set (d) a vacuum cleaner
32. 32.True or false: a towel is not needed for the card-on-a-glass trick. (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: the same glass is what we measure. (a) True (b) False
34. 34.🧺 Which of these is needed for the card-on-a-glass trick? (a) a stiff postcard (b) yeast (c) a balloon (d) a battery cell
35. 35.⚖️ 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 change it (b) we keep it the same (c) we measure it
36. 36.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
37. 37.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
38. 38.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a balloon (c) a glass of water (d) a battery cell
39. 39.True or false: a towel is needed for the card-on-a-glass trick. (a) False (b) True
40. 40.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a fridge magnet (c) a drinking straw (d) a suction hook

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