Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 348 · 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.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) a magnet (c) air pushing up (d) glue on the card
2. 2.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) water (c) air (d) smoke
3. 3.📘 Air presses on everything around us. What is this push called? (a) sunlight (b) magnetism (c) friction (d) air pressure
4. 4.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
5. 5.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) over a laptop (c) on a bed (d) over a sink or bucket
6. 6.🧺 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 towel
7. 7.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
8. 8.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is heavier (c) it will not break (d) it is hotter
9. 9.⚖️ 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) False (b) True
10. 10.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to make it rain (c) to catch any spills (d) to grow plants
11. 11.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) juice likes plastic (c) air pushes it up (d) the straw is magnetic
12. 12.🧺 Which of these is needed for the card-on-a-glass trick? (a) a towel (b) a mirror (c) a battery cell (d) a magnet
13. 13.True or false: a balloon is not needed for the card-on-a-glass trick. (a) False (b) True
14. 14.⚖️ 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
15. 15.🥛 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
16. 16.⚖️ 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 card (b) whether the card stays (c) the same glass (d) how full the glass is
17. 17.⚖️ 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 change it (b) we measure it (c) we keep it the same
18. 18.True or false: a vacuum cleaner works by air pressure. (a) True (b) False
19. 19.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card stays on (b) the card flies away (c) the glass breaks (d) the water turns to ice
20. 20.True or false: a bicycle pump works by magnetism. (a) True (b) False
21. 21.⚖️ 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 kept the same. (a) True (b) False
22. 22.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) the cap is sticky (c) the bottle is magnetic (d) water is hiding there
23. 23.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) True (b) False
24. 24.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
25. 25.True or false: a compass needle works by magnetism. (a) False (b) True
26. 26.True or false: a magnetic chess set works by magnetism. (a) False (b) True
27. 27.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
28. 28.⚖️ 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 keep it the same (c) we measure it
29. 29.True or false: a suction hook works by air pressure. (a) True (b) False
30. 30.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a stiff postcard (c) a magnet (d) yeast
31. 31.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a mirror (c) a glass of water (d) a magnet
32. 32.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) False (b) True
33. 33.True or false: yeast is needed for the card-on-a-glass trick. (a) False (b) True
34. 34.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a sink or a bucket (c) a magnet (d) a glass of water
35. 35.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) True (b) False
36. 36.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a glass of water (c) a sink or a bucket (d) a battery cell
37. 37.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) turmeric powder (b) a glass of water (c) a towel (d) a stiff postcard
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 card (b) the way we turn it (c) the same glass (d) whether the card stays
39. 39.True or false: a vacuum cleaner works by magnetism. (a) True (b) False
40. 40.⚖️ 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 measure it (b) we keep it the same (c) we change it

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