Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 951 · 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.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) False (b) True
2. 2.⚖️ 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) the same card (b) how full the glass is (c) the way we turn it (d) the same glass
3. 3.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
4. 4.True or false: a bicycle pump works by magnetism. (a) True (b) False
5. 5.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) air inside pushes back (c) the bottle is magnetic (d) water is hiding there
6. 6.True or false: a balloon is needed for the card-on-a-glass trick. (a) True (b) False
7. 7.⚖️ 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 keep it the same (c) we change it
8. 8.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a glass of water (c) a balloon (d) turmeric powder
9. 9.🔍 Which is the odd one out? (a) a compass needle (b) a vacuum cleaner (c) a magnetic chess set (d) a magnetic pin holder
10. 10.🧺 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 towel
11. 11.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
12. 12.True or false: a medicine dropper works by magnetism. (a) True (b) False
13. 13.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
14. 14.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
15. 15.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a medicine dropper (c) a vacuum cleaner (d) a suction hook
16. 16.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a fridge magnet (c) a compass needle (d) a medicine dropper
17. 17.⚖️ 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
18. 18.🧺 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) yeast (d) a sink or a bucket
19. 19.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
20. 20.🧺 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 balloon (d) a glass of water
21. 21.🔍 Which is the odd one out? (a) a medicine dropper (b) a bicycle pump (c) a magnetic chess set (d) a drinking straw
22. 22.⚖️ 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
23. 23.True or false: a fridge magnet works by magnetism. (a) False (b) True
24. 24.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
25. 25.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) the cold water (c) a magnet (d) air pushing up
26. 26.⚖️ 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
27. 27.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) False (b) True
28. 28.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a stiff postcard (c) a magnet (d) a sink or a bucket
29. 29.🥤 Why does juice go up a drinking straw when you sip? (a) air pushes it up (b) the straw is hot (c) juice likes plastic (d) the straw is magnetic
30. 30.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) over a sink or bucket (c) near a plug point (d) on a bed
31. 31.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is hotter (c) it is heavier (d) it will not break
32. 32.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a towel (c) a stiff postcard (d) a balloon
33. 33.⚖️ 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 card (b) the way we turn it (c) whether the card stays (d) the same glass
34. 34.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a magnet (c) a towel (d) a battery cell
35. 35.⚖️ 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 what we measure. (a) False (b) True
36. 36.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) False (b) True
37. 37.🔍 Which is the odd one out? (a) a fridge magnet (b) a magnetic pin holder (c) a compass needle (d) a drinking straw
38. 38.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to make it rain (c) to catch any spills (d) to grow plants
39. 39.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
40. 40.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure

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