Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 691 · 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 balloon (b) a towel (c) a sink or a bucket (d) a stiff postcard
2. 2.⚖️ 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
3. 3.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a vacuum cleaner (c) a drinking straw (d) a fridge magnet
4. 4.⚖️ 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 measure it (b) we change it (c) we keep it the same
5. 5.🧺 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 battery cell (d) a stiff postcard
6. 6.True or false: a medicine dropper works by magnetism. (a) True (b) False
7. 7.True or false: a magnetic pin holder works by air pressure. (a) False (b) True
8. 8.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a sink or a bucket (c) yeast (d) a towel
9. 9.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a drinking straw (c) a compass needle (d) a fridge magnet
10. 10.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
11. 11.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) water is hiding there (c) the cap is sticky (d) air inside pushes back
12. 12.🥛 Which of these works by magnetism? (a) a suction hook (b) a bicycle pump (c) a compass needle (d) a drinking straw
13. 13.True or false: a magnet is not needed for the card-on-a-glass trick. (a) True (b) False
14. 14.⚖️ 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) whether the card stays (c) the same glass (d) the way we turn it
15. 15.🧺 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) yeast (d) a towel
16. 16.⚖️ 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
17. 17.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to catch any spills (c) to cool the glass (d) to grow plants
18. 18.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a stiff postcard (c) a magnet (d) a mirror
19. 19.🔍 Which is the odd one out? (a) a bicycle pump (b) a drinking straw (c) a magnetic chess set (d) a suction hook
20. 20.🧺 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 glass of water (c) turmeric powder (d) a stiff postcard
21. 21.🛟 Where should you do the card-and-glass trick? (a) over a sink or bucket (b) near a plug point (c) on a bed (d) over a laptop
22. 22.🔍 Which is the odd one out? (a) a compass needle (b) a bicycle pump (c) a medicine dropper (d) a drinking straw
23. 23.True or false: a fridge magnet works by air pressure. (a) True (b) False
24. 24.⚖️ 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 same card (c) how full the glass is
25. 25.⚖️ 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 what we measure. (a) True (b) False
26. 26.🧺 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) a magnet (d) a glass of water
27. 27.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a sink or a bucket (c) turmeric powder (d) yeast
28. 28.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is magnetic (c) it is heavier (d) it is hotter
29. 29.📘 Air presses on everything around us. What is this push called? (a) magnetism (b) sunlight (c) air pressure (d) friction
30. 30.True or false: yeast is not needed for the card-on-a-glass trick. (a) True (b) False
31. 31.True or false: a drinking straw works by air pressure. (a) True (b) False
32. 32.🔍 Which is the odd one out? (a) a bicycle pump (b) a suction hook (c) a drinking straw (d) a magnetic pin holder
33. 33.⚖️ 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
34. 34.🥛 Why is it best to fill the glass right to the top? (a) it looks nicer (b) water is heavier (c) the card gets wet (d) little air left inside
35. 35.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
36. 36.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) water (c) air (d) sand
37. 37.⚖️ 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) whether the card stays (c) the way we turn it
38. 38.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) True (b) False
39. 39.🥤 Why does juice go up a drinking straw when you sip? (a) juice likes plastic (b) the straw is magnetic (c) air pushes it up (d) the straw is hot
40. 40.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) False (b) True

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