Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 502 · 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.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
2. 2.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) sand (c) water (d) smoke
3. 3.⚖️ 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 kept the same. (a) False (b) True
4. 4.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic chess set (c) a vacuum cleaner (d) a compass needle
5. 5.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
6. 6.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a glass of water (c) a towel (d) a battery cell
7. 7.⚖️ 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
8. 8.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) True (b) False
9. 9.⚖️ 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 same card (c) whether the card stays
10. 10.🔍 Which is the odd one out? (a) a bicycle pump (b) a suction hook (c) a fridge magnet (d) a drinking straw
11. 11.🥛 Which of these works by magnetism? (a) a suction hook (b) a fridge magnet (c) a drinking straw (d) a medicine dropper
12. 12.⚖️ 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
13. 13.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
14. 14.True or false: a suction hook works by air pressure. (a) False (b) True
15. 15.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
16. 16.🔍 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
17. 17.True or false: a towel is needed for the card-on-a-glass trick. (a) False (b) True
18. 18.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a glass of water (c) yeast (d) a magnet
19. 19.True or false: a fridge magnet works by magnetism. (a) False (b) True
20. 20.⚖️ 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
21. 21.🧺 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 towel (d) a mirror
22. 22.True or false: a fridge magnet works by air pressure. (a) True (b) False
23. 23.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) True (b) False
24. 24.🧺 Which of these is needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a magnet (c) a balloon (d) yeast
25. 25.True or false: a magnetic pin holder works by magnetism. (a) True (b) False
26. 26.⚖️ 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
27. 27.True or false: a compass needle works by magnetism. (a) False (b) True
28. 28.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
29. 29.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a glass of water (c) yeast (d) a towel
30. 30.⚖️ 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
31. 31.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
32. 32.⚖️ 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) False (b) True
33. 33.⚖️ 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) whether the card stays (b) the same card (c) how full the glass is (d) the same glass
34. 34.True or false: a battery cell is needed for the card-on-a-glass trick. (a) False (b) True
35. 35.True or false: a magnetic chess set works by air pressure. (a) True (b) False
36. 36.🥛 Which of these works by magnetism? (a) a suction hook (b) a medicine dropper (c) a compass needle (d) a vacuum cleaner
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 card”? (a) we change it (b) we keep it the same (c) we measure it
38. 38.True or false: a balloon is not needed for the card-on-a-glass trick. (a) False (b) True
39. 39.🔮 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
40. 40.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a glass of water (c) a sink or a bucket (d) a balloon

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