Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 495 · 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.🛟 Where should you do the card-and-glass trick? (a) over a sink or bucket (b) on a bed (c) over a laptop (d) near a plug point
2. 2.⚖️ 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 keep it the same (c) we change it
3. 3.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a mirror (c) a towel (d) a glass of water
4. 4.⚖️ 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) False (b) True
5. 5.⚖️ 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
6. 6.True or false: a suction hook works by magnetism. (a) True (b) False
7. 7.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) sand (c) smoke (d) water
8. 8.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) water is hiding there (c) the cap is sticky (d) air inside pushes back
9. 9.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) yeast (b) a glass of water (c) a sink or a bucket (d) a stiff postcard
10. 10.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a suction hook (c) a magnetic chess set (d) a medicine dropper
11. 11.True or false: a magnetic pin holder works by magnetism. (a) True (b) False
12. 12.🥛 Which of these works by magnetism? (a) a drinking straw (b) a medicine dropper (c) a bicycle pump (d) a compass needle
13. 13.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) True (b) False
14. 14.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
15. 15.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a suction hook (c) a magnetic pin holder (d) a fridge magnet
16. 16.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
17. 17.True or false: yeast is needed for the card-on-a-glass trick. (a) True (b) False
18. 18.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) magnetism (b) air pressure
19. 19.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is the one thing we change? (a) whether the card stays (b) the same glass (c) the same card (d) how full the glass is
20. 20.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is magnetic (c) it is hotter (d) it is heavier
21. 21.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
22. 22.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a magnet (c) a sink or a bucket (d) a stiff postcard
23. 23.🔍 Which is the odd one out? (a) a fridge magnet (b) a magnetic pin holder (c) a magnetic chess set (d) a suction hook
24. 24.🥛 Which of these works by air pressure? (a) a drinking straw (b) a compass needle (c) a fridge magnet (d) a magnetic pin holder
25. 25.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a magnet (c) a glass of water (d) a balloon
26. 26.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) it looks nicer (c) the card gets wet (d) little air left inside
27. 27.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) turmeric powder (c) a sink or a bucket (d) a stiff postcard
28. 28.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a fridge magnet (c) a compass needle (d) a bicycle pump
29. 29.⚖️ 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 measure it (c) we keep it the same
30. 30.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
31. 31.True or false: a towel is not needed for the card-on-a-glass trick. (a) False (b) True
32. 32.True or false: a magnetic chess set works by magnetism. (a) True (b) False
33. 33.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
34. 34.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
35. 35.🔍 Which is the odd one out? (a) a bicycle pump (b) a drinking straw (c) a magnetic pin holder (d) a medicine dropper
36. 36.⚖️ 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) how full the glass is (b) the same glass (c) the same card (d) whether the card stays
37. 37.🥤 Why does juice go up a drinking straw when you sip? (a) juice likes plastic (b) the straw is magnetic (c) air pushes it up (d) the straw is hot
38. 38.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a balloon (c) a towel (d) a sink or a bucket
39. 39.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
40. 40.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a balloon (c) a mirror (d) a sink or a bucket

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