Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 921 · 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.⚖️ 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
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 glass (b) whether the card stays (c) how full the glass is
3. 3.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) water (c) air (d) smoke
4. 4.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a glass of water (c) a towel (d) yeast
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 change it (b) we keep it the same (c) we measure it
6. 6.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a vacuum cleaner (c) a fridge magnet (d) a suction hook
7. 7.True or false: a bicycle pump works by air pressure. (a) False (b) True
8. 8.🔍 Which is the odd one out? (a) a drinking straw (b) a magnetic pin holder (c) a compass needle (d) a magnetic chess set
9. 9.🥛 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
10. 10.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) water is hiding there (c) the bottle is magnetic (d) the cap is sticky
11. 11.True or false: a suction hook works by magnetism. (a) False (b) True
12. 12.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
13. 13.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
14. 14.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the way we turn it is kept the same. (a) True (b) False
15. 15.⚖️ 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 change it (b) we keep it the same (c) we measure it
16. 16.⚖️ 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 way we turn it (b) whether the card stays (c) how full the glass is
17. 17.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
18. 18.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is hotter (c) it will not break (d) it is heavier
19. 19.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a mirror (c) a stiff postcard (d) a magnet
20. 20.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) air pressure (b) magnetism
21. 21.True or false: a magnetic chess set works by air pressure. (a) False (b) True
22. 22.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
23. 23.🥛 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
24. 24.True or false: a vacuum cleaner works by magnetism. (a) False (b) True
25. 25.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a towel (c) a glass of water (d) yeast
26. 26.⚖️ 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
27. 27.🥤 Why does juice go up a drinking straw when you sip? (a) juice likes plastic (b) the straw is hot (c) air pushes it up (d) the straw is magnetic
28. 28.🛟 Where should you do the card-and-glass trick? (a) over a sink or bucket (b) over a laptop (c) near a plug point (d) on a bed
29. 29.🥛 Which of these works by air pressure? (a) a compass needle (b) a fridge magnet (c) a magnetic chess set (d) a bicycle pump
30. 30.⚖️ 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 keep it the same (c) we measure it
31. 31.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) True (b) False
32. 32.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a glass of water (c) a towel (d) turmeric powder
33. 33.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
34. 34.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
35. 35.🧺 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 mirror
36. 36.True or false: a balloon is needed for the card-on-a-glass trick. (a) False (b) True
37. 37.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the water turns to ice (b) the glass breaks (c) the card flies away (d) the card stays on
38. 38.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a magnet (c) a glass of water (d) a stiff postcard
39. 39.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
40. 40.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed

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