Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 189 · 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.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) the cap is sticky (c) water is hiding there (d) air inside pushes back
2. 2.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a suction hook (c) a drinking straw (d) a magnetic chess set
3. 3.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) near a plug point (c) over a laptop (d) over a sink or bucket
4. 4.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
5. 5.⚖️ 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 change it (c) we measure it
6. 6.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the water turns to ice (b) the card flies away (c) the card stays on (d) the glass breaks
7. 7.True or false: a compass needle works by magnetism. (a) False (b) True
8. 8.⚖️ 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) False (b) True
9. 9.🧺 Which of these is not needed for the card-on-a-glass trick? (a) yeast (b) a sink or a bucket (c) a glass of water (d) a towel
10. 10.🔮 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
11. 11.⚖️ 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
12. 12.📘 Air presses on everything around us. What is this push called? (a) magnetism (b) air pressure (c) friction (d) sunlight
13. 13.⚖️ 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 change it (c) we keep it the same
14. 14.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a magnetic chess set (c) a fridge magnet (d) a bicycle pump
15. 15.⚖️ 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) True (b) False
16. 16.⚖️ 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) whether the card stays (b) the same card (c) the same glass (d) the way we turn it
17. 17.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is hotter (c) it is magnetic (d) it will not break
18. 18.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
19. 19.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
20. 20.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
21. 21.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a mirror (c) a stiff postcard (d) a towel
22. 22.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure
23. 23.⚖️ 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) True (b) False
24. 24.🥛 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
25. 25.🥛 Which of these works by air pressure? (a) a suction hook (b) a compass needle (c) a magnetic pin holder (d) a magnetic chess set
26. 26.🔍 Which is the odd one out? (a) a bicycle pump (b) a fridge magnet (c) a suction hook (d) a vacuum cleaner
27. 27.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
28. 28.⚖️ 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
29. 29.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
30. 30.🥛 Which of these works by air pressure? (a) a compass needle (b) a medicine dropper (c) a magnetic pin holder (d) a fridge magnet
31. 31.⚖️ 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 keep it the same (c) we measure it
32. 32.🧺 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 towel (d) a battery cell
33. 33.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) yeast (c) a balloon (d) a towel
34. 34.🧺 Which of these is needed for the card-on-a-glass trick? (a) a glass of water (b) turmeric powder (c) a mirror (d) a balloon
35. 35.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) False (b) True
36. 36.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) glue on the card (c) the cold water (d) air pushing up
37. 37.True or false: a mirror is not needed for the card-on-a-glass trick. (a) False (b) True
38. 38.⚖️ 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 glass (b) the same card (c) the way we turn it (d) how full the glass is
39. 39.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a balloon (b) a towel (c) a stiff postcard (d) a glass of water
40. 40.🧺 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) yeast (d) a glass of water

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