Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 124 · 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? Which of these is the one thing we change? (a) how full the glass is (b) the way we turn it (c) the same glass (d) whether the card stays
2. 2.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is the one thing we change. (a) False (b) True
3. 3.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
4. 4.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
5. 5.🔮 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
6. 6.🧺 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 battery cell (c) a glass of water (d) a stiff postcard
7. 7.🔍 Which is the odd one out? (a) a fridge magnet (b) a magnetic chess set (c) a bicycle pump (d) a compass needle
8. 8.⚖️ 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
9. 9.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) it looks nicer (c) the card gets wet (d) little air left inside
10. 10.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a towel (c) a balloon (d) turmeric powder
11. 11.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) the bottle is magnetic (c) water is hiding there (d) air inside pushes back
12. 12.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a magnetic chess set (c) a bicycle pump (d) a compass needle
13. 13.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) over a sink or bucket (c) near a plug point (d) on a bed
14. 14.True or false: a magnet is needed for the card-on-a-glass trick. (a) True (b) False
15. 15.🔍 Which is the odd one out? (a) a drinking straw (b) a suction hook (c) a vacuum cleaner (d) a compass needle
16. 16.True or false: a balloon is needed for the card-on-a-glass trick. (a) True (b) False
17. 17.🧺 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 sink or a bucket (d) a stiff postcard
18. 18.🧺 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 towel (d) a glass of water
19. 19.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
20. 20.🥛 Which of these works by magnetism? (a) a suction hook (b) a drinking straw (c) a medicine dropper (d) a fridge magnet
21. 21.True or false: a battery cell is needed for the card-on-a-glass trick. (a) True (b) False
22. 22.⚖️ 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 measure it (b) we keep it the same (c) we change it
23. 23.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
24. 24.🔍 Which is the odd one out? (a) a magnetic chess set (b) a drinking straw (c) a compass needle (d) a magnetic pin holder
25. 25.⚖️ 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
26. 26.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
27. 27.🧺 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 magnet (d) a sink or a bucket
28. 28.True or false: a drinking straw works by air pressure. (a) False (b) True
29. 29.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a mirror (c) a towel (d) a glass of water
30. 30.🔍 Which is the odd one out? (a) a fridge magnet (b) a magnetic chess set (c) a vacuum cleaner (d) a magnetic pin holder
31. 31.⚖️ 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
32. 32.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
33. 33.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) magnetism (b) air pressure
34. 34.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic pin holder (c) a magnetic chess set (d) a suction hook
35. 35.⚖️ 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
36. 36.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the water turns to ice (b) the card stays on (c) the glass breaks (d) the card flies away
37. 37.⚖️ 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 keep it the same (c) we change it
38. 38.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a stiff postcard (c) a towel (d) a mirror
39. 39.⚖️ 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 measure it (b) we change it (c) we keep it the same
40. 40.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True

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