Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 936 · 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.🧺 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 stiff postcard (c) turmeric powder (d) a glass of water
2. 2.🔍 Which is the odd one out? (a) a drinking straw (b) a compass needle (c) a magnetic chess set (d) a magnetic pin holder
3. 3.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a stiff postcard (c) yeast (d) a glass of water
4. 4.🥛 Which of these works by air pressure? (a) a medicine dropper (b) a compass needle (c) a magnetic pin holder (d) a fridge magnet
5. 5.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) True (b) False
6. 6.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) water is hiding there (c) air inside pushes back (d) the cap is sticky
7. 7.⚖️ 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
8. 8.True or false: a magnetic chess set works by magnetism. (a) False (b) True
9. 9.🔍 Which is the odd one out? (a) a magnetic chess set (b) a suction hook (c) a magnetic pin holder (d) a compass needle
10. 10.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) True (b) False
11. 11.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) yeast (c) a towel (d) a glass of water
12. 12.🥛 Which of these works by air pressure? (a) a bicycle pump (b) a fridge magnet (c) a compass needle (d) a magnetic chess set
13. 13.🛟 Where should you do the card-and-glass trick? (a) over a sink or bucket (b) near a plug point (c) over a laptop (d) on a bed
14. 14.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) False (b) True
15. 15.⚖️ 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) how full the glass is (b) the same glass (c) the way we turn it (d) the same card
16. 16.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
17. 17.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) water (c) smoke (d) air
18. 18.⚖️ 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) the same glass
19. 19.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a magnet (c) yeast (d) a sink or a bucket
20. 20.🧺 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 magnet (d) a sink or a bucket
21. 21.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a towel (c) a battery cell (d) a sink or a bucket
22. 22.⚖️ 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
23. 23.True or false: a medicine dropper works by magnetism. (a) True (b) False
24. 24.True or false: a compass needle works by air pressure. (a) True (b) False
25. 25.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
26. 26.🔍 Which is the odd one out? (a) a suction hook (b) a medicine dropper (c) a fridge magnet (d) a vacuum cleaner
27. 27.⚖️ 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 change it (b) we measure it (c) we keep it the same
28. 28.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a battery cell (c) a towel (d) a magnet
29. 29.⚖️ 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 change it (c) we keep it the same
30. 30.🥛 Why is it best to fill the glass right to the top? (a) it looks nicer (b) water is heavier (c) the card gets wet (d) little air left inside
31. 31.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
32. 32.True or false: a balloon is not needed for the card-on-a-glass trick. (a) False (b) True
33. 33.⚖️ 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
34. 34.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
35. 35.True or false: a suction hook works by magnetism. (a) False (b) True
36. 36.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
37. 37.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a battery cell (b) a stiff postcard (c) a sink or a bucket (d) a glass of water
38. 38.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) air pressure (b) magnetism
39. 39.True or false: a fridge magnet works by air pressure. (a) True (b) False
40. 40.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a drinking straw (c) a bicycle pump (d) a magnetic chess set

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