Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 776 · 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.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) True (b) False
2. 2.🧺 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
3. 3.⚖️ 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 way we turn it (b) whether the card stays (c) the same card (d) how full the glass is
4. 4.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a compass needle (c) a magnetic chess set (d) a bicycle pump
5. 5.⚖️ 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
6. 6.🔍 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 glass breaks (d) the water turns to ice
7. 7.🥛 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
8. 8.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) False (b) True
9. 9.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) False (b) True
10. 10.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) False (b) True
11. 11.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
12. 12.🥛 Which of these works by magnetism? (a) a magnetic pin holder (b) a suction hook (c) a drinking straw (d) a vacuum cleaner
13. 13.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) turmeric powder (b) a stiff postcard (c) a towel (d) a sink or a bucket
14. 14.True or false: a battery cell is needed for the card-on-a-glass trick. (a) True (b) False
15. 15.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
16. 16.🧺 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) yeast (d) a glass of water
17. 17.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
18. 18.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a battery cell (c) a magnet (d) a glass of water
19. 19.🔍 Which is the odd one out? (a) a fridge magnet (b) a drinking straw (c) a medicine dropper (d) a suction hook
20. 20.🔮 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) air inside pushes back (d) water is hiding there
21. 21.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
22. 22.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
23. 23.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a compass needle (c) a magnetic pin holder (d) a drinking straw
24. 24.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a drinking straw (c) a medicine dropper (d) a vacuum cleaner
25. 25.📘 Air presses on everything around us. What is this push called? (a) friction (b) air pressure (c) sunlight (d) magnetism
26. 26.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) turmeric powder (c) a sink or a bucket (d) a towel
27. 27.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to make it rain (c) to grow plants (d) to catch any spills
28. 28.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a stiff postcard (c) a battery cell (d) a magnet
29. 29.True or false: yeast is needed for the card-on-a-glass trick. (a) True (b) False
30. 30.⚖️ 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 glass (c) how full the glass is
31. 31.True or false: a medicine dropper works by magnetism. (a) True (b) False
32. 32.⚖️ 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) the same glass (c) how full the glass is (d) whether the card stays
33. 33.True or false: a magnet is not needed for the card-on-a-glass trick. (a) True (b) False
34. 34.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a sink or a bucket (c) a balloon (d) a stiff postcard
35. 35.⚖️ 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 keep it the same (b) we measure it (c) we change it
36. 36.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
37. 37.🥛 Which of these works by magnetism? (a) a suction hook (b) a bicycle pump (c) a magnetic chess set (d) a drinking straw
38. 38.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a mirror (b) a sink or a bucket (c) a towel (d) a stiff postcard
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 same glass”? (a) we keep it the same (b) we measure it (c) we change it
40. 40.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) air pressure (b) magnetism

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