Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 352 · 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.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a magnet (c) a glass of water (d) a towel
2. 2.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is magnetic (b) the straw is hot (c) juice likes plastic (d) air pushes it up
3. 3.🧺 Do we need a towel 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? What do we do with “whether the card stays”? (a) we measure it (b) we change it (c) we keep it the same
5. 5.⚖️ 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) the way we turn it (c) whether the card stays (d) how full the glass is
6. 6.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a stiff postcard (c) a balloon (d) a glass of water
7. 7.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a sink or a bucket (c) a mirror (d) yeast
8. 8.True or false: yeast is not needed for the card-on-a-glass trick. (a) False (b) True
9. 9.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) a magnet (c) a glass of water (d) yeast
10. 10.⚖️ 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
11. 11.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
12. 12.True or false: a magnetic chess set works by air pressure. (a) False (b) True
13. 13.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) glue on the card (c) air pushing up (d) the cold water
14. 14.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is hotter (c) it is magnetic (d) it is heavier
15. 15.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
16. 16.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a magnet (c) a sink or a bucket (d) a towel
17. 17.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) False (b) True
18. 18.🥛 Which of these works by magnetism? (a) a suction hook (b) a bicycle pump (c) a drinking straw (d) a magnetic pin holder
19. 19.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a battery cell (b) a sink or a bucket (c) a stiff postcard (d) a glass of water
20. 20.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
21. 21.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a suction hook (c) a magnetic chess set (d) a fridge magnet
22. 22.🥛 Which of these works by air pressure? (a) a compass needle (b) a fridge magnet (c) a suction hook (d) a magnetic pin holder
23. 23.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
24. 24.🔮 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
25. 25.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) magnetism (b) air pressure
26. 26.True or false: a drinking straw works by magnetism. (a) True (b) False
27. 27.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
28. 28.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card stays on (b) the glass breaks (c) the water turns to ice (d) the card flies away
29. 29.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic pin holder (c) a medicine dropper (d) a compass needle
30. 30.True or false: a magnetic chess set works by magnetism. (a) False (b) True
31. 31.⚖️ 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
32. 32.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a sink or a bucket (c) a stiff postcard (d) a battery cell
33. 33.⚖️ 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) whether the card stays (c) the way we turn it
34. 34.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
35. 35.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a stiff postcard (c) a sink or a bucket (d) yeast
36. 36.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) over a laptop (c) near a plug point (d) over a sink or bucket
37. 37.🧺 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 stiff postcard (d) a towel
38. 38.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
39. 39.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a bicycle pump (c) a compass needle (d) a magnetic pin holder
40. 40.True or false: a balloon is needed for the card-on-a-glass trick. (a) True (b) False

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