Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 961 · 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 is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is heavier (c) it is hotter (d) it will not break
2. 2.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) air (c) sand (d) water
3. 3.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) False (b) True
4. 4.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is the one thing we change. (a) False (b) True
5. 5.True or false: a glass of water is needed for the card-on-a-glass trick. (a) True (b) False
6. 6.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
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 change it (c) we keep it the same
8. 8.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
9. 9.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
10. 10.🥛 What holds the card up against the upside-down glass? (a) air pushing up (b) glue on the card (c) a magnet (d) the cold water
11. 11.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
12. 12.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
13. 13.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
14. 14.🔍 Which is the odd one out? (a) a fridge magnet (b) a magnetic chess set (c) a vacuum cleaner (d) a magnetic pin holder
15. 15.⚖️ 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
16. 16.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) over a laptop (c) over a sink or bucket (d) on a bed
17. 17.⚖️ 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) True (b) False
18. 18.🥛 Does a compass needle 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 what we measure? (a) the way we turn it (b) the same glass (c) how full the glass is (d) whether the card stays
20. 20.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) yeast (c) a sink or a bucket (d) a glass of water
21. 21.🧺 Do we need turmeric powder 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 battery cell (b) a sink or a bucket (c) a stiff postcard (d) a towel
23. 23.🥛 Which of these works by magnetism? (a) a drinking straw (b) a suction hook (c) a magnetic chess set (d) a medicine dropper
24. 24.⚖️ 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 keep it the same (c) we measure it
25. 25.⚖️ 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) True (b) False
26. 26.⚖️ 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) whether the card stays (c) how full the glass is (d) the way we turn it
27. 27.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic chess set (c) a bicycle pump (d) a magnetic pin holder
28. 28.True or false: a drinking straw works by magnetism. (a) False (b) True
29. 29.True or false: a drinking straw works by air pressure. (a) False (b) True
30. 30.🥛 Which of these works by magnetism? (a) a drinking straw (b) a suction hook (c) a compass needle (d) a bicycle pump
31. 31.True or false: a fridge magnet works by air pressure. (a) False (b) True
32. 32.True or false: a vacuum cleaner works by magnetism. (a) True (b) False
33. 33.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
34. 34.⚖️ 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
35. 35.True or false: yeast is not needed for the card-on-a-glass trick. (a) False (b) True
36. 36.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a stiff postcard (c) a sink or a bucket (d) a mirror
37. 37.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) True (b) False
38. 38.🧺 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) a magnet (d) a stiff postcard
39. 39.True or false: a suction hook works by magnetism. (a) True (b) False
40. 40.⚖️ 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

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