Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 499 · 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.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is magnetic (c) it is hotter (d) it will not break
2. 2.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) smoke (c) air (d) sand
3. 3.⚖️ 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 change it (c) we keep it the same
4. 4.⚖️ 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 keep it the same (b) we change it (c) we measure it
5. 5.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to catch any spills (c) to cool the glass (d) to make it rain
6. 6.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) glue on the card (c) air pushing up (d) the cold water
7. 7.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
8. 8.True or false: a magnetic chess set works by air pressure. (a) False (b) True
9. 9.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) magnetism (b) air pressure
10. 10.🧺 Which of these is not needed for the card-on-a-glass trick? (a) yeast (b) a towel (c) a glass of water (d) a sink or a bucket
11. 11.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) water is heavier (c) it looks nicer (d) little air left inside
12. 12.🔍 Which is the odd one out? (a) a medicine dropper (b) a vacuum cleaner (c) a compass needle (d) a suction hook
13. 13.True or false: a balloon is needed for the card-on-a-glass trick. (a) True (b) False
14. 14.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
15. 15.🥛 Which of these works by magnetism? (a) a suction hook (b) a bicycle pump (c) a magnetic pin holder (d) a drinking straw
16. 16.⚖️ 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
17. 17.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) air pressure (b) magnetism
18. 18.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is the one thing we change. (a) False (b) True
19. 19.⚖️ 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) the same card (c) the same glass (d) how full the glass is
20. 20.⚖️ 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
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) a magnet (d) a sink or a bucket
22. 22.True or false: a fridge magnet works by magnetism. (a) False (b) True
23. 23.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
24. 24.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a stiff postcard (c) yeast (d) a battery cell
25. 25.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a towel (c) a sink or a bucket (d) yeast
26. 26.📘 Air presses on everything around us. What is this push called? (a) sunlight (b) friction (c) air pressure (d) magnetism
27. 27.True or false: a compass needle works by air pressure. (a) False (b) True
28. 28.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a sink or a bucket (c) a towel (d) turmeric powder
29. 29.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) True (b) False
30. 30.🔮 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) air inside pushes back (d) water is hiding there
31. 31.⚖️ 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) the way we turn it (c) how full the glass is
32. 32.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) True (b) False
33. 33.🥛 Which of these works by magnetism? (a) a fridge magnet (b) a bicycle pump (c) a suction hook (d) a medicine dropper
34. 34.True or false: a magnetic chess set works by magnetism. (a) True (b) False
35. 35.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
36. 36.⚖️ 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) the way we turn it (d) how full the glass is
37. 37.⚖️ 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
38. 38.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a balloon (c) a sink or a bucket (d) a battery cell
39. 39.True or false: a bicycle pump works by magnetism. (a) True (b) False
40. 40.True or false: a magnet is needed for the card-on-a-glass trick. (a) True (b) False

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