Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 730 · 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.⚖️ 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) False (b) True
2. 2.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) it looks nicer (c) water is heavier (d) little air left inside
3. 3.⚖️ 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
4. 4.⚖️ 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) the same glass (c) whether the card stays (d) how full the glass is
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 measure it (c) we change it
6. 6.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to cool the glass (c) to grow plants (d) to catch any spills
7. 7.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) a balloon (c) a towel (d) a magnet
8. 8.🥛 What holds the card up against the upside-down glass? (a) air pushing up (b) the cold water (c) a magnet (d) glue on the card
9. 9.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
10. 10.🔍 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
11. 11.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) False (b) True
12. 12.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
13. 13.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
14. 14.⚖️ 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
15. 15.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is magnetic (c) it is heavier (d) it will not break
16. 16.🧺 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) yeast (d) a towel
17. 17.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure
18. 18.🔍 Which is the odd one out? (a) a medicine dropper (b) a drinking straw (c) a magnetic pin holder (d) a vacuum cleaner
19. 19.⚖️ 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) how full the glass is (b) the way we turn it (c) the same card (d) whether the card stays
20. 20.True or false: a bicycle pump works by air pressure. (a) True (b) False
21. 21.True or false: a bicycle pump works by magnetism. (a) True (b) False
22. 22.🔍 Which is the odd one out? (a) a medicine dropper (b) a magnetic chess set (c) a fridge magnet (d) a magnetic pin holder
23. 23.🔍 Which is the odd one out? (a) a drinking straw (b) a fridge magnet (c) a medicine dropper (d) a suction hook
24. 24.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) over a laptop (c) near a plug point (d) over a sink or bucket
25. 25.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) True (b) False
26. 26.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) the bottle is magnetic (c) water is hiding there (d) the cap is sticky
27. 27.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
28. 28.🥛 Which of these works by magnetism? (a) a drinking straw (b) a bicycle pump (c) a vacuum cleaner (d) a magnetic pin holder
29. 29.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a compass needle (c) a drinking straw (d) a suction hook
30. 30.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a sink or a bucket (c) yeast (d) a towel
31. 31.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a glass of water (c) a mirror (d) a sink or a bucket
32. 32.🧺 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 sink or a bucket (d) a balloon
33. 33.🥛 Which of these works by air pressure? (a) a medicine dropper (b) a compass needle (c) a magnetic pin holder (d) a fridge magnet
34. 34.🧺 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 towel (d) a magnet
35. 35.⚖️ 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 kept the same. (a) False (b) True
36. 36.⚖️ 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
37. 37.🧺 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 stiff postcard
38. 38.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) air pressure (b) magnetism
39. 39.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
40. 40.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a sink or a bucket (c) turmeric powder (d) a mirror

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