Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 426 · 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.🥛 Which of these works by air pressure? (a) a compass needle (b) a magnetic pin holder (c) a medicine dropper (d) a magnetic chess set
2. 2.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is what we measure. (a) True (b) False
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) the same glass (b) whether the card stays (c) how full the glass is
4. 4.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a balloon (c) a sink or a bucket (d) a stiff postcard
5. 5.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it will not break (c) it is heavier (d) it is magnetic
6. 6.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
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) True (b) False
8. 8.⚖️ 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) True (b) False
9. 9.🥛 Which of these works by air pressure? (a) a vacuum cleaner (b) a magnetic pin holder (c) a compass needle (d) a magnetic chess set
10. 10.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a magnet (c) yeast (d) a stiff postcard
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.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a mirror (c) yeast (d) a towel
13. 13.⚖️ 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 measure it (c) we change it
14. 14.🔍 Which is the odd one out? (a) a suction hook (b) a medicine dropper (c) a magnetic chess set (d) a vacuum cleaner
15. 15.True or false: a magnet is not needed for the card-on-a-glass trick. (a) True (b) False
16. 16.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) the bottle is magnetic (c) water is hiding there (d) the cap is sticky
17. 17.⚖️ 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) how full the glass is (d) whether the card stays
18. 18.True or false: a compass needle works by air pressure. (a) False (b) True
19. 19.🔍 Which is the odd one out? (a) a bicycle pump (b) a compass needle (c) a magnetic pin holder (d) a fridge magnet
20. 20.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) little air left inside (c) the card gets wet (d) it looks nicer
21. 21.True or false: a bicycle pump works by air pressure. (a) False (b) True
22. 22.⚖️ 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
23. 23.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) glue on the card (c) air pushing up (d) a magnet
24. 24.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a compass needle (c) a magnetic chess set (d) a suction hook
25. 25.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) turmeric powder (c) a glass of water (d) a towel
26. 26.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
27. 27.True or false: a magnetic chess set works by magnetism. (a) False (b) True
28. 28.⚖️ 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 change it (b) we keep it the same (c) we measure it
29. 29.🧺 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
30. 30.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a battery cell (b) a glass of water (c) a sink or a bucket (d) a stiff postcard
31. 31.True or false: a vacuum cleaner works by air pressure. (a) True (b) False
32. 32.🔮 Why do we try the card trick over a sink or a bucket? (a) to catch any spills (b) to cool the glass (c) to make it rain (d) to grow plants
33. 33.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
34. 34.True or false: a fridge magnet works by air pressure. (a) False (b) True
35. 35.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a sink or a bucket (c) a magnet (d) a glass of water
36. 36.True or false: a medicine dropper works by magnetism. (a) False (b) True
37. 37.True or false: a suction hook works by air pressure. (a) False (b) True
38. 38.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) magnetism (b) air pressure
39. 39.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) False (b) True
40. 40.⚖️ 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

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