Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 200 · 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 it best to fill the glass right to the top? (a) it looks nicer (b) the card gets wet (c) little air left inside (d) water is heavier
2. 2.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) air inside pushes back (c) the bottle is magnetic (d) water is hiding there
3. 3.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
4. 4.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a magnetic chess set (c) a suction hook (d) a medicine dropper
5. 5.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) smoke (c) water (d) air
6. 6.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to cool the glass (c) to grow plants (d) to catch any spills
7. 7.True or false: a medicine dropper works by air pressure. (a) False (b) True
8. 8.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
9. 9.🧺 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 balloon (d) a towel
10. 10.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a mirror (b) a towel (c) a sink or a bucket (d) a stiff postcard
11. 11.True or false: a medicine dropper works by magnetism. (a) True (b) False
12. 12.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
13. 13.🥤 Why does juice go up a drinking straw when you sip? (a) juice likes plastic (b) the straw is hot (c) air pushes it up (d) the straw is magnetic
14. 14.True or false: a magnet is needed for the card-on-a-glass trick. (a) True (b) False
15. 15.⚖️ 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
16. 16.🔍 Which is the odd one out? (a) a compass needle (b) a suction hook (c) a magnetic chess set (d) a magnetic pin holder
17. 17.⚖️ 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 kept the same. (a) False (b) True
18. 18.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
19. 19.True or false: a magnetic pin holder works by air pressure. (a) False (b) True
20. 20.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) yeast (c) a stiff postcard (d) a towel
21. 21.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a magnet (c) a glass of water (d) a towel
22. 22.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is magnetic (c) it is heavier (d) it will not break
23. 23.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a glass of water (c) a mirror (d) turmeric powder
24. 24.⚖️ 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 keep it the same (b) we measure it (c) we change it
25. 25.⚖️ 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
26. 26.🥛 Which of these works by magnetism? (a) a magnetic pin holder (b) a bicycle pump (c) a drinking straw (d) a medicine dropper
27. 27.True or false: a magnetic pin holder works by magnetism. (a) True (b) False
28. 28.⚖️ 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
29. 29.🔍 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 stays on (c) the card flies away (d) the water turns to ice
30. 30.True or false: a magnetic chess set works by air pressure. (a) False (b) True
31. 31.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) glue on the card (c) a magnet (d) air pushing up
32. 32.⚖️ 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 same glass (b) how full the glass is (c) the same card (d) whether the card stays
33. 33.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
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) whether the card stays (b) the way we turn it (c) how full the glass is
35. 35.True or false: a suction hook works by magnetism. (a) False (b) True
36. 36.True or false: yeast is not needed for the card-on-a-glass trick. (a) False (b) True
37. 37.⚖️ 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) how full the glass is (b) the same glass (c) whether the card stays (d) the way we turn it
38. 38.True or false: a vacuum cleaner works by magnetism. (a) False (b) True
39. 39.⚖️ 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
40. 40.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True

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