Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 879 · 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.🧺 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) yeast (d) a sink or a bucket
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) whether the card stays (b) the same glass (c) how full the glass is (d) the way we turn it
3. 3.⚖️ 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 measure it (c) we keep it the same
4. 4.🥛 Which of these works by air pressure? (a) a compass needle (b) a magnetic chess set (c) a medicine dropper (d) a magnetic pin holder
5. 5.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
6. 6.True or false: a magnet is not needed for the card-on-a-glass trick. (a) True (b) False
7. 7.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) yeast (c) a towel (d) a battery cell
8. 8.🔍 Which is the odd one out? (a) a drinking straw (b) a vacuum cleaner (c) a compass needle (d) a bicycle pump
9. 9.True or false: a fridge magnet works by air pressure. (a) False (b) True
10. 10.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
11. 11.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is heavier (c) it will not break (d) it is magnetic
12. 12.⚖️ 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
13. 13.🥛 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
14. 14.🔍 Which is the odd one out? (a) a suction hook (b) a medicine dropper (c) a magnetic chess set (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 way we turn it is kept the same. (a) True (b) False
16. 16.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) True (b) False
17. 17.⚖️ 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 what we measure. (a) False (b) True
18. 18.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic chess set (c) a suction hook (d) a magnetic pin holder
19. 19.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) air pushing up (c) glue on the card (d) a magnet
20. 20.🥛 Which of these works by magnetism? (a) a magnetic pin holder (b) a bicycle pump (c) a vacuum cleaner (d) a drinking straw
21. 21.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) air pressure (b) magnetism
22. 22.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) the bottle is magnetic (c) water is hiding there (d) air inside pushes back
23. 23.🧺 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 towel (c) a battery cell (d) a glass of water
24. 24.True or false: a magnetic chess set works by magnetism. (a) False (b) True
25. 25.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
26. 26.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
27. 27.⚖️ 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) how full the glass is (b) whether the card stays (c) the way we turn it
28. 28.🔍 Which is the odd one out? (a) a medicine dropper (b) a magnetic pin holder (c) a compass needle (d) a magnetic chess set
29. 29.True or false: yeast is not needed for the card-on-a-glass trick. (a) True (b) False
30. 30.⚖️ 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) how full the glass is (c) the same glass (d) the way we turn it
31. 31.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) True (b) False
32. 32.⚖️ 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 what we measure. (a) False (b) True
33. 33.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) water (c) air (d) sand
34. 34.🔍 Which is the odd one out? (a) a fridge magnet (b) a magnetic chess set (c) a magnetic pin holder (d) a drinking straw
35. 35.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
36. 36.🔮 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 catch any spills (d) to grow plants
37. 37.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) over a sink or bucket (c) on a bed (d) near a plug point
38. 38.🧺 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 towel (c) a magnet (d) a stiff postcard
39. 39.🔍 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 glass breaks (c) the card stays on (d) the water turns to ice
40. 40.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a balloon (b) a towel (c) a glass of water (d) a sink or a bucket

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