Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 113 · 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.🥛 Which of these works by air pressure? (a) a compass needle (b) a fridge magnet (c) a vacuum cleaner (d) a magnetic chess set
2. 2.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) air pushing up (c) the cold water (d) glue on the card
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.🔍 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 card flies away (d) the glass breaks
5. 5.🧺 Which of these is needed for the card-on-a-glass trick? (a) a glass of water (b) a balloon (c) a mirror (d) a magnet
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) air inside pushes back (c) water is hiding there (d) the cap is sticky
7. 7.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
8. 8.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a mirror (c) turmeric powder (d) a sink or a bucket
9. 9.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a battery cell (c) a magnet (d) a towel
10. 10.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a drinking straw (c) a magnetic pin holder (d) a magnetic chess set
11. 11.🥛 Which of these works by air pressure? (a) a compass needle (b) a suction hook (c) a fridge magnet (d) a magnetic chess set
12. 12.⚖️ 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 glass (b) the way we turn it (c) whether the card stays (d) how full the glass is
13. 13.🔮 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 grow plants (d) to catch any spills
14. 14.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a stiff postcard (c) a battery cell (d) a balloon
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) whether the card stays (b) the same glass (c) the way we turn it (d) how full the glass is
16. 16.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a mirror (c) a sink or a bucket (d) a stiff postcard
17. 17.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) on a bed (c) over a sink or bucket (d) over a laptop
18. 18.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a stiff postcard (c) a magnet (d) a towel
19. 19.⚖️ 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) False (b) True
20. 20.🔍 Which is the odd one out? (a) a drinking straw (b) a compass needle (c) a vacuum cleaner (d) a medicine dropper
21. 21.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a battery cell (b) a towel (c) a glass of water (d) a sink or a bucket
22. 22.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
23. 23.True or false: a magnetic pin holder works by magnetism. (a) False (b) True
24. 24.🥛 Does a compass needle work by air pressure or by magnetism? (a) magnetism (b) air pressure
25. 25.🧺 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 towel (c) a mirror (d) a glass of water
26. 26.🧺 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 magnet
27. 27.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
28. 28.True or false: a fridge magnet works by magnetism. (a) False (b) True
29. 29.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
30. 30.True or false: a balloon is needed for the card-on-a-glass trick. (a) False (b) True
31. 31.🔍 Which is the odd one out? (a) a bicycle pump (b) a fridge magnet (c) a magnetic pin holder (d) a magnetic chess set
32. 32.⚖️ 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
33. 33.🔍 Which is the odd one out? (a) a compass needle (b) a suction hook (c) a magnetic chess set (d) a fridge magnet
34. 34.True or false: a glass of water is needed for the card-on-a-glass trick. (a) True (b) False
35. 35.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
36. 36.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) air pressure (b) magnetism
37. 37.⚖️ 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) False (b) True
38. 38.⚖️ 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 the one thing we change. (a) True (b) False
39. 39.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
40. 40.True or false: a towel is needed for the card-on-a-glass trick. (a) True (b) False

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