Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 798 · 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.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) on a bed (c) over a sink or bucket (d) near a plug point
2. 2.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a balloon (c) a sink or a bucket (d) a towel
3. 3.⚖️ 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) how full the glass is (b) the way we turn it (c) whether the card stays (d) the same glass
4. 4.True or false: a vacuum cleaner works by magnetism. (a) True (b) False
5. 5.⚖️ 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
6. 6.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) water is hiding there (c) air inside pushes back (d) the bottle is magnetic
7. 7.⚖️ 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
8. 8.🔮 Why do we try the card trick over a sink or a bucket? (a) to catch any spills (b) to cool the glass (c) to make it rain (d) to grow plants
9. 9.🧺 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) turmeric powder (d) a towel
10. 10.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) smoke (c) water (d) sand
11. 11.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a mirror (b) a stiff postcard (c) a sink or a bucket (d) a towel
12. 12.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is what we measure. (a) False (b) True
13. 13.True or false: a towel is not needed for the card-on-a-glass trick. (a) True (b) False
14. 14.🔍 Which is the odd one out? (a) a magnetic chess set (b) a drinking straw (c) a vacuum cleaner (d) a suction hook
15. 15.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a towel (c) a magnet (d) a stiff postcard
16. 16.True or false: a compass needle works by air pressure. (a) True (b) False
17. 17.True or false: a magnet is not needed for the card-on-a-glass trick. (a) True (b) False
18. 18.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
19. 19.🔍 Which is the odd one out? (a) a fridge magnet (b) a magnetic chess set (c) a magnetic pin holder (d) a suction hook
20. 20.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) turmeric powder (c) a glass of water (d) a sink or a bucket
21. 21.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
22. 22.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a mirror (c) a towel (d) a glass of water
23. 23.True or false: a drinking straw works by magnetism. (a) True (b) False
24. 24.🥤 Why does juice go up a drinking straw when you sip? (a) juice likes plastic (b) the straw is hot (c) the straw is magnetic (d) air pushes it up
25. 25.⚖️ 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 change it (c) we keep it the same
26. 26.⚖️ 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
27. 27.True or false: a compass needle works by magnetism. (a) False (b) True
28. 28.🛟 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
29. 29.🔍 Which is the odd one out? (a) a drinking straw (b) a suction hook (c) a medicine dropper (d) a fridge magnet
30. 30.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a sink or a bucket (b) a balloon (c) a glass of water (d) a towel
31. 31.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a suction hook (c) a magnetic chess set (d) a drinking straw
32. 32.🥛 Why is it best to fill the glass right to the top? (a) it looks nicer (b) little air left inside (c) the card gets wet (d) water is heavier
33. 33.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
34. 34.⚖️ 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
35. 35.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
36. 36.True or false: yeast is not needed for the card-on-a-glass trick. (a) True (b) False
37. 37.⚖️ 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
38. 38.⚖️ 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) True (b) False
39. 39.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
40. 40.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) a magnet (c) a glass of water (d) yeast

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