Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 614 · 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 bicycle pump works by magnetism. (a) True (b) False
2. 2.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) air inside pushes back (c) water is hiding there (d) the bottle is magnetic
3. 3.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a glass of water (c) a sink or a bucket (d) a magnet
4. 4.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
5. 5.⚖️ 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
6. 6.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
7. 7.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
8. 8.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) yeast (b) a sink or a bucket (c) a towel (d) a glass of water
9. 9.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a compass needle (c) a drinking straw (d) a suction hook
10. 10.True or false: a vacuum cleaner works by magnetism. (a) True (b) False
11. 11.⚖️ 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) True (b) False
12. 12.⚖️ 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) the same glass (b) whether the card stays (c) the same card (d) how full the glass is
13. 13.True or false: a fridge magnet works by magnetism. (a) False (b) True
14. 14.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) True (b) False
15. 15.⚖️ 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 the one thing we change. (a) False (b) True
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) the way we turn it (c) whether the card stays (d) the same glass
17. 17.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
18. 18.True or false: a balloon is 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: the same glass is what we measure. (a) True (b) False
20. 20.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a stiff postcard (c) a glass of water (d) yeast
21. 21.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is heavier (c) it is magnetic (d) it is hotter
22. 22.⚖️ 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
23. 23.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a magnet (c) a sink or a bucket (d) turmeric powder
24. 24.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
25. 25.True or false: a mirror is not needed for the card-on-a-glass trick. (a) False (b) True
26. 26.📘 Air presses on everything around us. What is this push called? (a) friction (b) magnetism (c) sunlight (d) air pressure
27. 27.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
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 what we measure. (a) True (b) False
29. 29.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) turmeric powder (b) a sink or a bucket (c) a towel (d) a stiff postcard
30. 30.True or false: a compass needle works by air pressure. (a) False (b) True
31. 31.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
32. 32.True or false: a vacuum cleaner works by air pressure. (a) False (b) True
33. 33.⚖️ 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 measure it (c) we keep it the same
34. 34.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) yeast (c) a battery cell (d) a towel
35. 35.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) True (b) False
36. 36.🔍 Which is the odd one out? (a) a drinking straw (b) a medicine dropper (c) a vacuum cleaner (d) a magnetic pin holder
37. 37.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a medicine dropper (c) a magnetic chess set (d) a compass needle
38. 38.True or false: a magnetic pin holder works by magnetism. (a) False (b) True
39. 39.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a magnetic chess set (c) a medicine dropper (d) a vacuum cleaner
40. 40.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) over a laptop (c) over a sink or bucket (d) on a bed

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