Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 673 · 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 towel (b) a magnet (c) a glass of water (d) a stiff postcard
2. 2.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a balloon (c) a towel (d) a magnet
3. 3.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it will not break (c) it is heavier (d) it is hotter
4. 4.⚖️ 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
5. 5.⚖️ 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
6. 6.⚖️ 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
7. 7.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) air inside pushes back (c) water is hiding there (d) the bottle is magnetic
8. 8.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
9. 9.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
10. 10.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a balloon (c) yeast (d) a sink or a bucket
11. 11.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
12. 12.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
13. 13.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
14. 14.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) water (c) air (d) sand
15. 15.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
16. 16.🧺 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 balloon (d) a stiff postcard
17. 17.🧺 Which of these is not needed for the card-on-a-glass trick? (a) turmeric powder (b) a towel (c) a sink or a bucket (d) a stiff postcard
18. 18.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
19. 19.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
20. 20.🔮 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
21. 21.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
22. 22.True or false: a mirror is not needed for the card-on-a-glass trick. (a) False (b) True
23. 23.🔍 Which is the odd one out? (a) a drinking straw (b) a compass needle (c) a bicycle pump (d) a suction hook
24. 24.True or false: yeast is not needed for the card-on-a-glass trick. (a) False (b) True
25. 25.🥛 Which of these works by air pressure? (a) a compass needle (b) a magnetic chess set (c) a magnetic pin holder (d) a suction hook
26. 26.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a sink or a bucket (c) a towel (d) yeast
27. 27.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) yeast (c) a stiff postcard (d) a glass of water
28. 28.True or false: a drinking straw works by magnetism. (a) False (b) True
29. 29.⚖️ 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 what we measure. (a) True (b) False
30. 30.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a bicycle pump (c) a magnetic chess set (d) a fridge magnet
31. 31.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
32. 32.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
33. 33.🔍 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
34. 34.True or false: a magnetic chess set works by air pressure. (a) False (b) True
35. 35.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) air pushing up (c) the cold water (d) a magnet
36. 36.True or false: a magnet is not needed for the card-on-a-glass trick. (a) True (b) False
37. 37.🥛 Why is it best to fill the glass right to the top? (a) little air left inside (b) it looks nicer (c) water is heavier (d) the card gets wet
38. 38.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a glass of water (c) turmeric powder (d) a towel
39. 39.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) True (b) False
40. 40.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure

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