Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 853 · 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.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
2. 2.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) sand (c) water (d) air
3. 3.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
4. 4.⚖️ 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) True (b) False
5. 5.⚖️ 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 keep it the same (b) we measure it (c) we change it
6. 6.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
7. 7.⚖️ 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
8. 8.🛟 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 magnetic (d) it is heavier
9. 9.🔍 Which is the odd one out? (a) a drinking straw (b) a magnetic pin holder (c) a suction hook (d) a medicine dropper
10. 10.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
11. 11.⚖️ 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
12. 12.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a fridge magnet (c) a drinking straw (d) a magnetic chess set
13. 13.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
14. 14.True or false: a suction hook works by air pressure. (a) False (b) True
15. 15.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card flies away (b) the card stays on (c) the glass breaks (d) the water turns to ice
16. 16.🧺 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 mirror (d) a glass of water
17. 17.True or false: a magnetic pin holder works by magnetism. (a) True (b) False
18. 18.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
19. 19.🥛 Which of these works by air pressure? (a) a compass needle (b) a vacuum cleaner (c) a magnetic chess set (d) a magnetic pin holder
20. 20.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) the cap is sticky (c) the bottle is magnetic (d) air inside pushes back
21. 21.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a compass needle (c) a fridge magnet (d) a medicine dropper
22. 22.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
23. 23.⚖️ 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
24. 24.⚖️ 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
25. 25.True or false: a magnetic pin holder works by air pressure. (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 “the way we turn it”? (a) we measure it (b) we change it (c) we keep it the same
27. 27.🥛 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
28. 28.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) True (b) False
29. 29.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) True (b) False
30. 30.True or false: a fridge magnet works by air pressure. (a) False (b) True
31. 31.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
32. 32.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
33. 33.🧺 Which of these is needed for the card-on-a-glass trick? (a) a glass of water (b) a balloon (c) turmeric powder (d) a magnet
34. 34.🥛 Which of these works by magnetism? (a) a fridge magnet (b) a drinking straw (c) a suction hook (d) a medicine dropper
35. 35.⚖️ 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) True (b) False
36. 36.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
37. 37.⚖️ 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
38. 38.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
39. 39.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a battery cell (c) a towel (d) a sink or a bucket
40. 40.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False

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