Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 653 · 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 needed for the card-on-a-glass trick? (a) a balloon (b) a magnet (c) a battery cell (d) a sink or a bucket
2. 2.🧺 Which of these is needed for the card-on-a-glass trick? (a) a towel (b) a balloon (c) turmeric powder (d) a mirror
3. 3.🧺 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 towel (c) a glass of water (d) a balloon
4. 4.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) air (c) water (d) sand
5. 5.⚖️ 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
6. 6.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the way we turn it”? (a) we keep it the same (b) we change it (c) we measure it
7. 7.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is heavier (c) it is hotter (d) it will not break
8. 8.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a towel (c) a stiff postcard (d) a battery cell
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 what we measure. (a) False (b) True
10. 10.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) on a bed (c) near a plug point (d) over a sink or bucket
11. 11.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) turmeric powder (c) a stiff postcard (d) a towel
12. 12.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
13. 13.📘 Air presses on everything around us. What is this push called? (a) magnetism (b) friction (c) air pressure (d) sunlight
14. 14.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a suction hook (c) a fridge magnet (d) a bicycle pump
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) a battery cell (d) a glass of water
16. 16.⚖️ 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) whether the card stays (c) the same glass (d) how full the glass is
17. 17.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) the cap is sticky (c) the bottle is magnetic (d) air inside pushes back
18. 18.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) True (b) False
19. 19.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a towel (c) a mirror (d) a sink or a bucket
20. 20.🥛 Why is it best to fill the glass right to the top? (a) little air left inside (b) the card gets wet (c) it looks nicer (d) water is heavier
21. 21.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
22. 22.🥛 Which of these works by magnetism? (a) a suction hook (b) a magnetic pin holder (c) a vacuum cleaner (d) a bicycle pump
23. 23.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
24. 24.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to cool the glass (c) to make it rain (d) to catch any spills
25. 25.True or false: a compass needle works by air pressure. (a) False (b) True
26. 26.🔍 Which is the odd one out? (a) a drinking straw (b) a fridge magnet (c) a bicycle pump (d) a suction hook
27. 27.True or false: a fridge magnet works by air pressure. (a) False (b) True
28. 28.⚖️ 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
29. 29.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) turmeric powder (c) a towel (d) a glass of water
30. 30.⚖️ 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) the way we turn it (c) whether the card stays
31. 31.⚖️ 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
32. 32.🔍 Which is the odd one out? (a) a bicycle pump (b) a magnetic pin holder (c) a compass needle (d) a magnetic chess set
33. 33.True or false: a suction hook works by air pressure. (a) True (b) False
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 kept the same. (a) True (b) False
35. 35.⚖️ 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 measure it (b) we change it (c) we keep it the same
36. 36.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a magnetic chess set (c) a suction hook (d) a drinking straw
37. 37.True or false: a magnetic chess set works by magnetism. (a) True (b) False
38. 38.🥤 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
39. 39.True or false: a mirror is needed for the card-on-a-glass trick. (a) True (b) False
40. 40.🧺 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) a mirror (d) a stiff postcard

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