Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 819 · 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.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to cool the glass (c) to catch any spills (d) to grow plants
2. 2.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
3. 3.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
4. 4.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
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) the same glass (b) how full the glass is (c) whether the card stays
6. 6.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a glass of water (c) a balloon (d) a sink or a bucket
7. 7.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
8. 8.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it will not break (c) it is magnetic (d) it is heavier
9. 9.⚖️ 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
10. 10.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) magnetism (b) air pressure
11. 11.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a magnet (b) a sink or a bucket (c) a towel (d) a stiff postcard
12. 12.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a suction hook (c) a fridge magnet (d) a bicycle pump
13. 13.⚖️ 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 change it (c) we measure it
14. 14.⚖️ 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) how full the glass is (c) the way we turn it (d) the same glass
15. 15.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
16. 16.True or false: a compass needle works by air pressure. (a) False (b) True
17. 17.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a stiff postcard (c) a battery cell (d) a glass of water
18. 18.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a drinking straw (c) a compass needle (d) a magnetic pin holder
19. 19.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
20. 20.⚖️ 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 change it (c) we measure it
21. 21.⚖️ 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) whether the card stays (b) the way we turn it (c) the same glass (d) how full the glass is
22. 22.True or false: yeast is needed for the card-on-a-glass trick. (a) False (b) True
23. 23.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) a magnet (c) air pushing up (d) the cold water
24. 24.True or false: a drinking straw works by air pressure. (a) True (b) False
25. 25.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
26. 26.⚖️ 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) False (b) True
27. 27.True or false: a mirror is not needed for the card-on-a-glass trick. (a) False (b) True
28. 28.⚖️ 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 measure it (c) we keep it the same
29. 29.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is what we measure. (a) False (b) True
30. 30.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a suction hook (c) a drinking straw (d) a medicine dropper
31. 31.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a magnetic chess set (c) a fridge magnet (d) a drinking straw
32. 32.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) on a bed (c) over a sink or bucket (d) near a plug point
33. 33.⚖️ 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) False (b) True
34. 34.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) air pressure (b) magnetism
35. 35.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
36. 36.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) a magnet (c) a mirror (d) a glass of water
37. 37.True or false: a fridge magnet works by magnetism. (a) False (b) True
38. 38.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a suction hook (c) a fridge magnet (d) a magnetic chess set
39. 39.🧺 Which of these is needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a mirror (c) turmeric powder (d) a balloon
40. 40.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) the card gets wet (c) little air left inside (d) it looks nicer

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