Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 306 · 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.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
2. 2.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic pin holder (c) a compass needle (d) a medicine dropper
3. 3.⚖️ 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 keep it the same (c) we measure it
4. 4.📘 Air presses on everything around us. What is this push called? (a) air pressure (b) sunlight (c) magnetism (d) friction
5. 5.⚖️ 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
6. 6.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is heavier (c) it is hotter (d) it is magnetic
7. 7.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
8. 8.True or false: yeast is not needed for the card-on-a-glass trick. (a) True (b) False
9. 9.⚖️ 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
10. 10.⚖️ 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 measure it (c) we keep it the same
11. 11.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: whether the card stays is kept the same. (a) True (b) False
12. 12.⚖️ 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
13. 13.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) the card gets wet (c) little air left inside (d) it looks nicer
14. 14.🧺 Which of these is needed for the card-on-a-glass trick? (a) a stiff postcard (b) a balloon (c) a mirror (d) a magnet
15. 15.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
16. 16.🧺 Which of these is needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a balloon (c) a magnet (d) a mirror
17. 17.🔍 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 water turns to ice (c) the glass breaks (d) the card stays on
18. 18.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a balloon (b) a glass of water (c) a towel (d) a sink or a bucket
19. 19.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a towel (c) a mirror (d) a stiff postcard
20. 20.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a glass of water (c) a sink or a bucket (d) yeast
21. 21.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: whether the card stays is what we measure. (a) False (b) True
22. 22.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a bicycle pump (c) a magnetic pin holder (d) a drinking straw
23. 23.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) True (b) False
24. 24.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
25. 25.⚖️ 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) whether the card stays (c) the way we turn it (d) how full the glass is
26. 26.🛟 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
27. 27.True or false: a magnetic pin holder works by magnetism. (a) True (b) False
28. 28.True or false: a drinking straw works by magnetism. (a) False (b) True
29. 29.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) yeast (c) a balloon (d) a towel
30. 30.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) air (c) water (d) smoke
31. 31.True or false: a magnetic chess set works by magnetism. (a) False (b) True
32. 32.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a sink or a bucket (c) a battery cell (d) a stiff postcard
33. 33.⚖️ 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
34. 34.🔮 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
35. 35.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a magnet (b) a glass of water (c) a stiff postcard (d) a towel
36. 36.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
37. 37.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
38. 38.🥛 Which of these works by air pressure? (a) a suction hook (b) a compass needle (c) a magnetic chess set (d) a fridge magnet
39. 39.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
40. 40.True or false: a towel is not needed for the card-on-a-glass trick. (a) False (b) True

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