Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 63 · 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? What do we do with “the way we turn it”? (a) we keep it the same (b) we change it (c) we measure it
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 way we turn it (b) how full the glass is (c) whether the card stays (d) the same glass
3. 3.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is kept the same. (a) True (b) False
4. 4.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
5. 5.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a balloon (b) a stiff postcard (c) a glass of water (d) a towel
6. 6.⚖️ 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 change it (b) we measure it (c) we keep it the same
7. 7.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
8. 8.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a towel (c) a glass of water (d) a mirror
9. 9.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
10. 10.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a sink or a bucket (b) a glass of water (c) a magnet (d) a stiff postcard
11. 11.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is heavier (c) it will not break (d) it is hotter
12. 12.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) near a plug point (c) over a sink or bucket (d) over a laptop
13. 13.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) water (c) smoke (d) air
14. 14.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
15. 15.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a suction hook (c) a magnetic chess set (d) a drinking straw
16. 16.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) yeast (c) a towel (d) a stiff postcard
17. 17.🥛 Which of these works by magnetism? (a) a fridge magnet (b) a suction hook (c) a vacuum cleaner (d) a drinking straw
18. 18.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic pin holder (c) a medicine dropper (d) a magnetic chess set
19. 19.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a balloon (c) a sink or a bucket (d) a glass of water
20. 20.⚖️ 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) whether the card stays (c) how full the glass is
21. 21.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) it looks nicer (c) water is heavier (d) little air left inside
22. 22.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) air pushing up (c) glue on the card (d) the cold water
23. 23.🧺 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) turmeric powder (d) a stiff postcard
24. 24.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) True (b) False
25. 25.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) False (b) True
26. 26.🔍 Which is the odd one out? (a) a fridge magnet (b) a compass needle (c) a bicycle pump (d) a magnetic pin holder
27. 27.⚖️ 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 kept the same. (a) True (b) False
28. 28.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to cool the glass (c) to make it rain (d) to catch any spills
29. 29.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
30. 30.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: how full the glass is is kept the same. (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: how full the glass is is the one thing we change. (a) True (b) False
32. 32.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
33. 33.⚖️ 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
34. 34.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
35. 35.🔍 Which is the odd one out? (a) a suction hook (b) a drinking straw (c) a vacuum cleaner (d) a fridge magnet
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) the same card (b) whether the card stays (c) the way we turn it (d) how full the glass is
37. 37.True or false: a bicycle pump works by air pressure. (a) True (b) False
38. 38.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
39. 39.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a suction hook (c) a compass needle (d) a magnetic chess set
40. 40.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) True (b) False

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