Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 77 · 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) a glass of water (d) turmeric powder
2. 2.True or false: a balloon is not needed for the card-on-a-glass trick. (a) False (b) True
3. 3.⚖️ 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 same glass (c) whether the card stays
4. 4.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) glue on the card (c) air pushing up (d) a magnet
5. 5.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
6. 6.🔮 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
7. 7.⚖️ 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 change it (c) we measure it
8. 8.True or false: a mirror is needed for the card-on-a-glass trick. (a) True (b) False
9. 9.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) water is heavier (c) it looks nicer (d) little air left inside
10. 10.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a mirror (c) a glass of water (d) a stiff postcard
11. 11.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
12. 12.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a mirror (c) a sink or a bucket (d) a towel
13. 13.⚖️ 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) False (b) True
14. 14.🔍 Which is the odd one out? (a) a drinking straw (b) a suction hook (c) a magnetic pin holder (d) a vacuum cleaner
15. 15.True or false: a magnet is not needed for the card-on-a-glass trick. (a) False (b) True
16. 16.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
17. 17.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) False (b) True
18. 18.🥛 Which of these works by magnetism? (a) a compass needle (b) a bicycle pump (c) a vacuum cleaner (d) a drinking straw
19. 19.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
20. 20.⚖️ 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) how full the glass is (c) the way we turn it (d) whether the card stays
21. 21.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a medicine dropper (c) a fridge magnet (d) a magnetic pin holder
22. 22.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a sink or a bucket (c) a towel (d) a magnet
23. 23.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
24. 24.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
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 the one thing we change. (a) False (b) True
26. 26.⚖️ 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
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 keep it the same (c) we measure it
28. 28.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the water turns to ice (c) the card stays on (d) the card flies away
29. 29.📘 Air presses on everything around us. What is this push called? (a) sunlight (b) air pressure (c) friction (d) magnetism
30. 30.🥛 Which of these works by air pressure? (a) a compass needle (b) a magnetic pin holder (c) a fridge magnet (d) a suction hook
31. 31.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a medicine dropper (c) a fridge magnet (d) a suction hook
32. 32.True or false: a battery cell is needed for the card-on-a-glass trick. (a) False (b) True
33. 33.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a fridge magnet (c) a bicycle pump (d) a magnetic chess set
34. 34.🧺 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 balloon (d) a sink or a bucket
35. 35.🥛 Which of these works by air pressure? (a) a compass needle (b) a magnetic chess set (c) a magnetic pin holder (d) a bicycle pump
36. 36.🥛 Which of these works by magnetism? (a) a suction hook (b) a magnetic pin holder (c) a drinking straw (d) a medicine dropper
37. 37.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
38. 38.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is hotter (c) it is heavier (d) it will not break
39. 39.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
40. 40.True or false: yeast is needed for the card-on-a-glass trick. (a) False (b) True

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