Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 406 · 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 magnetic chess set works by magnetism. (a) False (b) True
2. 2.True or false: a magnetic pin holder works by air pressure. (a) False (b) True
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 what we measure. (a) True (b) False
4. 4.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a drinking straw (c) a magnetic chess set (d) a suction hook
5. 5.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
6. 6.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
7. 7.⚖️ 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) False (b) True
8. 8.🧺 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 sink or a bucket (d) turmeric powder
9. 9.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) air pushing up (c) the cold water (d) glue on the card
10. 10.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it will not break (c) it is heavier (d) it is hotter
11. 11.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
12. 12.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a balloon (b) a stiff postcard (c) a sink or a bucket (d) a glass of water
13. 13.⚖️ 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
14. 14.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a magnet (c) a stiff postcard (d) a battery cell
15. 15.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the card flies away (c) the water turns to ice (d) the card stays on
16. 16.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) air inside pushes back (c) the bottle is magnetic (d) the cap is sticky
17. 17.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a sink or a bucket (c) yeast (d) a glass of water
18. 18.⚖️ 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) the way we turn it (b) how full the glass is (c) whether the card stays
19. 19.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
20. 20.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a magnet (c) a sink or a bucket (d) a stiff postcard
21. 21.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a fridge magnet (c) a bicycle pump (d) a suction hook
22. 22.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
23. 23.True or false: a glass of water is needed for the card-on-a-glass trick. (a) True (b) False
24. 24.🧺 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) a towel (d) a balloon
25. 25.⚖️ 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 card (d) the way we turn it
26. 26.True or false: a medicine dropper works by air pressure. (a) False (b) True
27. 27.🥛 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
28. 28.True or false: a vacuum cleaner works by air pressure. (a) True (b) False
29. 29.True or false: a towel is not needed for the card-on-a-glass trick. (a) True (b) False
30. 30.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
31. 31.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a mirror (c) a stiff postcard (d) a towel
32. 32.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) turmeric powder (c) a mirror (d) a towel
33. 33.🔍 Which is the odd one out? (a) a suction hook (b) a vacuum cleaner (c) a magnetic chess set (d) a drinking straw
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 towel (c) a glass of water (d) a battery cell
35. 35.⚖️ 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
36. 36.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a glass of water (c) yeast (d) a sink or a bucket
37. 37.True or false: a magnet is not needed for the card-on-a-glass trick. (a) True (b) False
38. 38.⚖️ 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) the same card (c) how full the glass is (d) whether the card stays
39. 39.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) water (c) smoke (d) air
40. 40.True or false: a bicycle pump works by magnetism. (a) True (b) False

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