Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 617 · 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.📘 Air presses on everything around us. What is this push called? (a) air pressure (b) friction (c) sunlight (d) magnetism
2. 2.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
3. 3.⚖️ 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
4. 4.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
5. 5.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) the bottle is magnetic (c) water is hiding there (d) air inside pushes back
6. 6.⚖️ 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 glass (c) how full the glass is
7. 7.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) a sink or a bucket (c) a magnet (d) a mirror
8. 8.🔍 Which is the odd one out? (a) a drinking straw (b) a fridge magnet (c) a magnetic pin holder (d) a magnetic chess set
9. 9.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a towel (c) a sink or a bucket (d) a mirror
10. 10.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a drinking straw (c) a bicycle pump (d) a vacuum cleaner
11. 11.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is the one thing we change. (a) True (b) False
12. 12.True or false: a towel is needed for the card-on-a-glass trick. (a) True (b) False
13. 13.True or false: a bicycle pump works by air pressure. (a) False (b) True
14. 14.⚖️ 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 keep it the same (c) we change it
15. 15.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is hotter (c) it is magnetic (d) it will not break
16. 16.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
17. 17.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) True (b) False
18. 18.True or false: a medicine dropper works by magnetism. (a) True (b) False
19. 19.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) magnetism (b) air pressure
20. 20.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the card flies away (c) the card stays on (d) the water turns to ice
21. 21.🧺 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 sink or a bucket (d) a towel
22. 22.True or false: a suction hook works by air pressure. (a) True (b) False
23. 23.⚖️ 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
24. 24.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
25. 25.⚖️ 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) True (b) False
26. 26.True or false: a vacuum cleaner works by air pressure. (a) True (b) False
27. 27.⚖️ 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
28. 28.True or false: a suction hook works by magnetism. (a) False (b) True
29. 29.🧺 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
30. 30.⚖️ 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 way we turn it (b) the same card (c) whether the card stays (d) how full the glass is
31. 31.True or false: a magnetic chess set works by magnetism. (a) True (b) False
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 what we measure. (a) False (b) True
33. 33.🧺 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 mirror (d) a glass of water
34. 34.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a sink or a bucket (c) a balloon (d) a glass of water
35. 35.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) yeast (c) a sink or a bucket (d) a glass of water
36. 36.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
37. 37.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) air pressure (b) magnetism
38. 38.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a battery cell (c) a glass of water (d) a sink or a bucket
39. 39.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a towel (c) a mirror (d) yeast
40. 40.True or false: a magnetic pin holder works by magnetism. (a) False (b) True

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