Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 327 · 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 of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a battery cell (c) a towel (d) a glass of water
2. 2.🥛 Which of these works by air pressure? (a) a compass needle (b) a magnetic chess set (c) a fridge magnet (d) a suction hook
3. 3.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
4. 4.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a suction hook (c) a drinking straw (d) a bicycle pump
5. 5.📘 Air presses on everything around us. What is this push called? (a) magnetism (b) friction (c) air pressure (d) sunlight
6. 6.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a magnet (b) a towel (c) a stiff postcard (d) a sink or a bucket
7. 7.🔍 Which is the odd one out? (a) a medicine dropper (b) a fridge magnet (c) a magnetic chess set (d) a compass needle
8. 8.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) True (b) False
9. 9.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) sand (c) smoke (d) air
10. 10.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a magnet (c) a towel (d) a glass of water
11. 11.⚖️ 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
12. 12.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) over a laptop (c) over a sink or bucket (d) near a plug point
13. 13.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
14. 14.⚖️ 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
15. 15.⚖️ 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
16. 16.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) little air left inside (c) it looks nicer (d) the card gets wet
17. 17.🥛 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
18. 18.⚖️ 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 way we turn it (d) the same card
19. 19.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to cool the glass (c) to catch any spills (d) to make it rain
20. 20.🥛 Which of these works by magnetism? (a) a drinking straw (b) a vacuum cleaner (c) a bicycle pump (d) a fridge magnet
21. 21.⚖️ 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
22. 22.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) False (b) True
23. 23.True or false: a magnet is not needed for the card-on-a-glass trick. (a) True (b) False
24. 24.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) air pressure (b) magnetism
25. 25.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is heavier (c) it is magnetic (d) it is hotter
26. 26.⚖️ 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) how full the glass is (c) the way we turn it (d) whether the card stays
27. 27.🧺 Which of these is needed for the card-on-a-glass trick? (a) a glass of water (b) a magnet (c) a balloon (d) a battery cell
28. 28.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
29. 29.🧺 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 mirror (c) a stiff postcard (d) a glass of water
30. 30.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a compass needle (c) a magnetic pin holder (d) a vacuum cleaner
31. 31.True or false: a stiff postcard 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? Which of these is kept the same? (a) how full the glass is (b) the same glass (c) whether the card stays
33. 33.🔍 Which is the odd one out? (a) a magnetic chess set (b) a medicine dropper (c) a bicycle pump (d) a suction hook
34. 34.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
35. 35.⚖️ 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
36. 36.🔮 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
37. 37.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) yeast (c) a balloon (d) a sink or a bucket
38. 38.🔍 Which is the odd one out? (a) a bicycle pump (b) a vacuum cleaner (c) a compass needle (d) a drinking straw
39. 39.True or false: a fridge magnet works by magnetism. (a) True (b) False
40. 40.True or false: a medicine dropper works by magnetism. (a) True (b) False

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