Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 477 · 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 glass of water (b) a towel (c) a mirror (d) a stiff postcard
2. 2.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a stiff postcard (c) a towel (d) yeast
3. 3.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
4. 4.🥛 Does a compass needle work by air pressure or by magnetism? (a) magnetism (b) air pressure
5. 5.True or false: a magnetic pin holder works by air pressure. (a) False (b) True
6. 6.⚖️ 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
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 what we measure. (a) True (b) False
8. 8.⚖️ 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) False (b) True
9. 9.🥛 Which of these works by magnetism? (a) a drinking straw (b) a magnetic chess set (c) a vacuum cleaner (d) a suction hook
10. 10.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a bicycle pump (c) a magnetic chess set (d) a fridge magnet
11. 11.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) magnetism (b) air pressure
12. 12.True or false: a bicycle pump works by magnetism. (a) False (b) True
13. 13.🥛 Why is it best to fill the glass right to the top? (a) little air left inside (b) the card gets wet (c) water is heavier (d) it looks nicer
14. 14.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) water (c) sand (d) smoke
15. 15.True or false: a towel is needed for the card-on-a-glass trick. (a) False (b) True
16. 16.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
17. 17.🧺 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 stiff postcard (d) a mirror
18. 18.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: how full the glass is is the one thing we change. (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 glass of water (b) a sink or a bucket (c) a stiff postcard (d) a balloon
20. 20.True or false: a battery cell is needed for the card-on-a-glass trick. (a) False (b) True
21. 21.🛟 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
22. 22.🥛 Which of these works by magnetism? (a) a compass needle (b) a bicycle pump (c) a suction hook (d) a drinking straw
23. 23.⚖️ 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 same glass (b) whether the card stays (c) how full the glass is
24. 24.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
25. 25.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a towel (c) a stiff postcard (d) a battery cell
26. 26.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to catch any spills (c) to grow plants (d) to make it rain
27. 27.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is what we measure. (a) True (b) False
28. 28.True or false: a mirror is not needed for the card-on-a-glass trick. (a) False (b) True
29. 29.⚖️ 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) how full the glass is (c) the same glass (d) whether the card stays
30. 30.🥛 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
31. 31.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) air pushes it up (c) juice likes plastic (d) the straw is magnetic
32. 32.🔮 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
33. 33.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a towel (c) turmeric powder (d) a magnet
34. 34.⚖️ 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 card (c) whether the card stays
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.⚖️ 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 change it (b) we measure it (c) we keep it the same
37. 37.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a medicine dropper (c) a fridge magnet (d) a suction hook
38. 38.🔍 Which is the odd one out? (a) a compass needle (b) a bicycle pump (c) a fridge magnet (d) a magnetic pin holder
39. 39.🧺 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) turmeric powder (d) a stiff postcard
40. 40.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a magnetic chess set (c) a fridge magnet (d) a vacuum cleaner

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