Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 379 · 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 is the odd one out? (a) a magnetic pin holder (b) a compass needle (c) a medicine dropper (d) a magnetic chess set
2. 2.True or false: a suction hook 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: the way we turn it is what we measure. (a) False (b) True
4. 4.🔮 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 cap is sticky (d) the bottle is magnetic
5. 5.🔍 Which is the odd one out? (a) a bicycle pump (b) a magnetic pin holder (c) a drinking straw (d) a suction hook
6. 6.True or false: a fridge magnet works by air pressure. (a) True (b) False
7. 7.🧺 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 stiff postcard (d) a sink or a bucket
8. 8.⚖️ 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) the same glass (c) the same card (d) how full the glass is
9. 9.⚖️ 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
10. 10.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
11. 11.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card flies away (b) the glass breaks (c) the water turns to ice (d) the card stays on
12. 12.⚖️ 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 change it (b) we measure it (c) we keep it the same
13. 13.⚖️ 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) whether the card stays (d) how full the glass is
14. 14.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is hotter (c) it will not break (d) it is heavier
15. 15.⚖️ 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) how full the glass is (c) whether the card stays
16. 16.🔍 Which is the odd one out? (a) a drinking straw (b) a magnetic chess set (c) a bicycle pump (d) a suction hook
17. 17.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
18. 18.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) False (b) True
19. 19.⚖️ 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 change it (c) we keep it the same
20. 20.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to grow plants (c) to cool the glass (d) to catch any spills
21. 21.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
22. 22.⚖️ 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 measure it (c) we change it
23. 23.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
24. 24.⚖️ 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
25. 25.True or false: a fridge magnet works by magnetism. (a) False (b) True
26. 26.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
27. 27.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
28. 28.⚖️ 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 way we turn it
29. 29.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a towel (c) a sink or a bucket (d) a battery cell
30. 30.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
31. 31.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) water (c) air (d) sand
32. 32.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) it looks nicer (c) the card gets wet (d) little air left inside
33. 33.🥛 Which of these works by magnetism? (a) a magnetic chess set (b) a suction hook (c) a drinking straw (d) a bicycle pump
34. 34.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a magnet (c) a balloon (d) a sink or a bucket
35. 35.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) a magnet (c) glue on the card (d) air pushing up
36. 36.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a stiff postcard (c) yeast (d) a glass of water
37. 37.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
38. 38.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure
39. 39.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a sink or a bucket (c) a glass of water (d) turmeric powder
40. 40.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a mirror (b) a glass of water (c) a stiff postcard (d) a towel

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