Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 170 · 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.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
2. 2.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) turmeric powder (c) a sink or a bucket (d) a towel
3. 3.⚖️ 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
4. 4.True or false: a balloon is needed for the card-on-a-glass trick. (a) False (b) True
5. 5.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
6. 6.🔍 Which is the odd one out? (a) a fridge magnet (b) a bicycle pump (c) a magnetic chess set (d) a magnetic pin holder
7. 7.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
8. 8.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is heavier (c) it is magnetic (d) it is hotter
9. 9.⚖️ 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) how full the glass is (c) whether the card stays
10. 10.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic chess set (c) a fridge magnet (d) a drinking straw
11. 11.🧺 Which of these is needed for the card-on-a-glass trick? (a) a stiff postcard (b) a balloon (c) a mirror (d) yeast
12. 12.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a mirror (b) a sink or a bucket (c) a glass of water (d) a towel
13. 13.⚖️ 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 keep it the same (b) we measure it (c) we change it
14. 14.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a towel (c) a magnet (d) a glass of water
15. 15.⚖️ 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) whether the card stays (c) the same glass (d) how full the glass is
16. 16.True or false: a towel is not needed for the card-on-a-glass trick. (a) True (b) False
17. 17.🥛 Which of these works by air pressure? (a) a compass needle (b) a suction hook (c) a magnetic pin holder (d) a fridge magnet
18. 18.True or false: a suction hook works by air pressure. (a) True (b) False
19. 19.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
20. 20.🔍 Which is the odd one out? (a) a bicycle pump (b) a vacuum cleaner (c) a fridge magnet (d) a suction hook
21. 21.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) True (b) False
22. 22.True or false: a drinking straw works by air pressure. (a) True (b) False
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.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a mirror (c) a balloon (d) a glass of water
25. 25.⚖️ 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 glass (b) the way we turn it (c) how full the glass is (d) the same card
26. 26.⚖️ 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
27. 27.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) air pressure (b) magnetism
28. 28.⚖️ 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
29. 29.🔍 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 water turns to ice (c) the glass breaks (d) the card stays on
30. 30.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) False (b) True
31. 31.⚖️ 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 keep it the same (c) we change it
32. 32.⚖️ 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) False (b) True
33. 33.True or false: a medicine dropper works by magnetism. (a) True (b) False
34. 34.⚖️ 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
35. 35.🔍 Which is the odd one out? (a) a fridge magnet (b) a compass needle (c) a suction hook (d) a magnetic chess set
36. 36.🥛 Which of these works by air pressure? (a) a bicycle pump (b) a magnetic pin holder (c) a compass needle (d) a fridge magnet
37. 37.🥛 Which of these works by air pressure? (a) a compass needle (b) a magnetic chess set (c) a drinking straw (d) a fridge magnet
38. 38.🥛 Why is it best to fill the glass right to the top? (a) little air left inside (b) it looks nicer (c) water is heavier (d) the card gets wet
39. 39.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is magnetic (b) juice likes plastic (c) the straw is hot (d) air pushes it up
40. 40.True or false: a compass needle works by magnetism. (a) True (b) False

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