Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 521 · 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.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) it looks nicer (c) little air left inside (d) the card gets wet
2. 2.True or false: a balloon is not needed for the card-on-a-glass trick. (a) False (b) True
3. 3.True or false: a bicycle pump works by air pressure. (a) False (b) True
4. 4.🔍 Which is the odd one out? (a) a drinking straw (b) a bicycle pump (c) a suction hook (d) a compass needle
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 kept the same. (a) True (b) False
6. 6.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
7. 7.True or false: a towel is needed for the card-on-a-glass trick. (a) True (b) False
8. 8.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
9. 9.True or false: a medicine dropper works by air pressure. (a) True (b) False
10. 10.⚖️ 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 keep it the same (c) we change it
11. 11.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a towel (c) a glass of water (d) a magnet
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 keep it the same (b) we change it (c) we measure it
13. 13.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a mirror (c) a glass of water (d) a balloon
14. 14.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is kept the same. (a) False (b) True
15. 15.True or false: a magnet is needed for the card-on-a-glass trick. (a) True (b) False
16. 16.⚖️ 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 change it (b) we keep it the same (c) we measure it
17. 17.True or false: a bicycle pump works by magnetism. (a) False (b) True
18. 18.True or false: a stiff postcard 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? True or false: whether the card stays is what we measure. (a) False (b) True
20. 20.🥛 Which of these works by magnetism? (a) a drinking straw (b) a bicycle pump (c) a suction hook (d) a magnetic chess set
21. 21.⚖️ 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 keep it the same (b) we change it (c) we measure it
22. 22.🔍 Which is the odd one out? (a) a bicycle pump (b) a vacuum cleaner (c) a medicine dropper (d) a fridge magnet
23. 23.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) a magnet (c) air pushing up (d) the cold water
24. 24.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) smoke (c) sand (d) water
25. 25.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
26. 26.🔮 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
27. 27.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
28. 28.🥤 Why does juice go up a drinking straw when you sip? (a) juice likes plastic (b) the straw is magnetic (c) the straw is hot (d) air pushes it up
29. 29.True or false: yeast is not needed for the card-on-a-glass trick. (a) True (b) False
30. 30.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
31. 31.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a drinking straw (c) a vacuum cleaner (d) a compass needle
32. 32.True or false: a magnetic chess set works by magnetism. (a) True (b) False
33. 33.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) False (b) True
34. 34.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
35. 35.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a glass of water (c) a sink or a bucket (d) yeast
36. 36.True or false: a drinking straw works by air pressure. (a) False (b) True
37. 37.🧺 Which of these is needed for the card-on-a-glass trick? (a) a stiff postcard (b) yeast (c) a mirror (d) a magnet
38. 38.True or false: a suction hook works by air pressure. (a) True (b) False
39. 39.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
40. 40.📘 Air presses on everything around us. What is this push called? (a) magnetism (b) sunlight (c) air pressure (d) friction

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