Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 195 · 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 glass of water is not needed for the card-on-a-glass trick. (a) False (b) True
2. 2.⚖️ 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) the same card (b) whether the card stays (c) how full the glass is
3. 3.🥛 Which of these works by air pressure? (a) a vacuum cleaner (b) a fridge magnet (c) a magnetic pin holder (d) a compass needle
4. 4.True or false: a fridge magnet works by magnetism. (a) False (b) True
5. 5.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
6. 6.⚖️ 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
7. 7.🧺 Which of these is needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a balloon (c) a mirror (d) turmeric powder
8. 8.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) air pressure (b) magnetism
9. 9.🥛 Which of these works by air pressure? (a) a bicycle pump (b) a compass needle (c) a magnetic pin holder (d) a fridge magnet
10. 10.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
11. 11.⚖️ 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) the same glass (b) whether the card stays (c) how full the glass is
12. 12.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
13. 13.⚖️ 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 glass (b) whether the card stays (c) the way we turn it (d) the same card
14. 14.🥛 Which of these works by magnetism? (a) a magnetic pin holder (b) a suction hook (c) a bicycle pump (d) a medicine dropper
15. 15.True or false: a medicine dropper works by magnetism. (a) False (b) True
16. 16.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) near a plug point (c) over a sink or bucket (d) on a bed
17. 17.True or false: a suction hook works by magnetism. (a) True (b) False
18. 18.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to make it rain (c) to catch any spills (d) to grow plants
19. 19.📘 Air presses on everything around us. What is this push called? (a) magnetism (b) sunlight (c) friction (d) air pressure
20. 20.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) yeast (c) a towel (d) a battery cell
21. 21.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) water is hiding there (c) the bottle is magnetic (d) air inside pushes back
22. 22.True or false: a suction hook works by air pressure. (a) True (b) False
23. 23.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
24. 24.⚖️ 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 keep it the same (c) we measure it
25. 25.⚖️ 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
26. 26.True or false: yeast is needed for the card-on-a-glass trick. (a) True (b) False
27. 27.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) air (c) sand (d) smoke
28. 28.True or false: a balloon is needed for the card-on-a-glass trick. (a) False (b) True
29. 29.⚖️ 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 measure it (b) we keep it the same (c) we change it
30. 30.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a sink or a bucket (c) a stiff postcard (d) a mirror
31. 31.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is magnetic (c) it is hotter (d) it will not break
32. 32.True or false: a compass needle 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? True or false: the same glass is the one thing we change. (a) True (b) False
34. 34.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) False (b) True
35. 35.⚖️ 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
36. 36.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) air pushing up (c) glue on the card (d) a magnet
37. 37.⚖️ 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
38. 38.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a stiff postcard (c) a balloon (d) a sink or a bucket
39. 39.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
40. 40.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is kept the same. (a) False (b) True

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