Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 156 · 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.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) False (b) True
2. 2.🔍 Which is the odd one out? (a) a drinking straw (b) a compass needle (c) a suction hook (d) a vacuum cleaner
3. 3.🔮 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) the cap is sticky (d) air inside pushes back
4. 4.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
5. 5.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it will not break (c) it is magnetic (d) it is hotter
6. 6.True or false: a towel is not needed for the card-on-a-glass trick. (a) True (b) False
7. 7.🔍 Which is the odd one out? (a) a bicycle pump (b) a magnetic pin holder (c) a magnetic chess set (d) a compass needle
8. 8.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a sink or a bucket (c) a stiff postcard (d) a magnet
9. 9.🥛 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
10. 10.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
11. 11.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to make it rain (c) to cool the glass (d) to catch any spills
12. 12.🔍 Which is the odd one out? (a) a fridge magnet (b) a drinking straw (c) a compass needle (d) a magnetic pin holder
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 stiff postcard (c) a towel (d) a balloon
14. 14.⚖️ 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
15. 15.True or false: a medicine dropper works by magnetism. (a) False (b) True
16. 16.⚖️ 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 measure it (b) we change it (c) we keep it the same
17. 17.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) the cold water (c) air pushing up (d) glue on the card
18. 18.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) True (b) False
19. 19.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a magnet (c) a sink or a bucket (d) a towel
20. 20.True or false: a towel is needed for the card-on-a-glass trick. (a) True (b) False
21. 21.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a stiff postcard (c) yeast (d) a sink or a bucket
22. 22.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
23. 23.True or false: a bicycle pump works by magnetism. (a) False (b) True
24. 24.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) False (b) True
25. 25.⚖️ 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 measure it (b) we change it (c) we keep it the same
26. 26.⚖️ 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 way we turn it (b) whether the card stays (c) the same glass (d) how full the glass is
27. 27.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
28. 28.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
29. 29.🔍 Which is the odd one out? (a) a suction hook (b) a medicine dropper (c) a magnetic pin holder (d) a drinking straw
30. 30.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) False (b) True
31. 31.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
32. 32.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a towel (c) turmeric powder (d) a balloon
33. 33.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same glass”? (a) we measure it (b) we keep it the same (c) we change it
34. 34.⚖️ 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 the one thing we change. (a) True (b) False
35. 35.🔍 Which is the odd one out? (a) a drinking straw (b) a bicycle pump (c) a fridge magnet (d) a suction hook
36. 36.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a compass needle (c) a drinking straw (d) a magnetic pin holder
37. 37.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) False (b) True
38. 38.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
39. 39.⚖️ 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) whether the card stays (b) how full the glass is (c) the same glass
40. 40.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed

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