Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 994 · 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.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) water is hiding there (c) the bottle is magnetic (d) air inside pushes back
2. 2.⚖️ 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 card (c) whether the card stays (d) the same glass
3. 3.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
4. 4.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) False (b) True
5. 5.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) True (b) False
6. 6.🥛 What holds the card up against the upside-down glass? (a) air pushing up (b) the cold water (c) glue on the card (d) a magnet
7. 7.⚖️ 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) True (b) False
8. 8.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) over a laptop (c) on a bed (d) over a sink or bucket
9. 9.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a bicycle pump (c) a magnetic chess set (d) a vacuum cleaner
10. 10.🧺 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 glass of water (d) a stiff postcard
11. 11.⚖️ 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 change it (b) we measure it (c) we keep it the same
12. 12.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
13. 13.True or false: a glass of water is needed for the card-on-a-glass trick. (a) True (b) False
14. 14.True or false: a mirror is not needed for the card-on-a-glass trick. (a) True (b) False
15. 15.🧺 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 glass of water (c) a stiff postcard (d) a battery cell
16. 16.True or false: a suction hook works by magnetism. (a) False (b) True
17. 17.🔍 Which is the odd one out? (a) a magnetic chess set (b) a fridge magnet (c) a magnetic pin holder (d) a medicine dropper
18. 18.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a towel (c) a glass of water (d) turmeric powder
19. 19.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
20. 20.🔮 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
21. 21.⚖️ 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) whether the card stays (b) the same card (c) how full the glass is
22. 22.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a balloon (b) a sink or a bucket (c) a stiff postcard (d) a glass of water
23. 23.True or false: a towel is not needed for the card-on-a-glass trick. (a) False (b) True
24. 24.⚖️ 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 change it (b) we measure it (c) we keep it the same
25. 25.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
26. 26.⚖️ 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) False (b) True
27. 27.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is heavier (c) it will not break (d) it is magnetic
28. 28.🔍 Which is the odd one out? (a) a magnetic chess set (b) a vacuum cleaner (c) a compass needle (d) a magnetic pin holder
29. 29.⚖️ 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
30. 30.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card flies away (b) the card stays on (c) the water turns to ice (d) the glass breaks
31. 31.⚖️ 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) how full the glass is (c) whether the card stays (d) the same card
32. 32.🥛 Which of these works by magnetism? (a) a compass needle (b) a bicycle pump (c) a medicine dropper (d) a vacuum cleaner
33. 33.🧺 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 glass of water (c) turmeric powder (d) a towel
34. 34.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a towel (c) a magnet (d) a glass of water
35. 35.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a compass needle (c) a drinking straw (d) a magnetic chess set
36. 36.🥛 Does a magnetic chess set 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? Which of these is kept the same? (a) how full the glass is (b) the way we turn it (c) whether the card stays
38. 38.🧺 Which of these is needed for the card-on-a-glass trick? (a) a towel (b) a magnet (c) a mirror (d) a battery cell
39. 39.🥛 Which of these works by air pressure? (a) a compass needle (b) a suction hook (c) a magnetic chess set (d) a magnetic pin holder
40. 40.🔍 Which is the odd one out? (a) a suction hook (b) a bicycle pump (c) a compass needle (d) a vacuum cleaner

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