Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 672 · 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.🧺 Which of these is needed for the card-on-a-glass trick? (a) a towel (b) a magnet (c) yeast (d) a battery cell
2. 2.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a magnetic chess set (c) a vacuum cleaner (d) a suction hook
3. 3.True or false: a suction hook works by air pressure. (a) True (b) False
4. 4.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
5. 5.🧺 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 magnet (d) a stiff postcard
6. 6.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a drinking straw (c) a magnetic pin holder (d) a fridge magnet
7. 7.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
8. 8.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a mirror (c) turmeric powder (d) a stiff postcard
9. 9.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
10. 10.🔮 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
11. 11.🥤 Why does juice go up a drinking straw when you sip? (a) juice likes plastic (b) air pushes it up (c) the straw is hot (d) the straw is magnetic
12. 12.🔮 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
13. 13.🔍 Which is the odd one out? (a) a drinking straw (b) a suction hook (c) a medicine dropper (d) a magnetic chess set
14. 14.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a glass of water (c) a stiff postcard (d) a mirror
15. 15.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) sand (c) smoke (d) water
16. 16.True or false: a balloon is needed for the card-on-a-glass trick. (a) False (b) True
17. 17.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a fridge magnet (c) a bicycle pump (d) a medicine dropper
18. 18.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
19. 19.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the way we turn it”? (a) we keep it the same (b) we measure it (c) we change it
20. 20.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
21. 21.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) a magnet (c) air pushing up (d) glue on the card
22. 22.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a battery cell (c) a glass of water (d) a towel
23. 23.⚖️ 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) whether the card stays (b) the same glass (c) the same card (d) how full the glass is
24. 24.True or false: a mirror is not needed for the card-on-a-glass trick. (a) True (b) False
25. 25.🧺 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 glass of water (d) a mirror
26. 26.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
27. 27.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a magnetic pin holder (c) a compass needle (d) a vacuum cleaner
28. 28.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a compass needle (c) a magnetic chess set (d) a drinking straw
29. 29.True or false: a vacuum cleaner works by magnetism. (a) False (b) True
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) the same card (b) how full the glass is (c) whether the card stays
31. 31.⚖️ 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
32. 32.True or false: a glass of water is needed for the card-on-a-glass trick. (a) True (b) False
33. 33.📘 Air presses on everything around us. What is this push called? (a) sunlight (b) magnetism (c) air pressure (d) friction
34. 34.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a magnet (c) a towel (d) a stiff postcard
35. 35.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a bicycle pump (c) a suction hook (d) a drinking straw
36. 36.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a sink or a bucket (b) yeast (c) a stiff postcard (d) a towel
37. 37.⚖️ 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
38. 38.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) turmeric powder (c) a sink or a bucket (d) a stiff postcard
39. 39.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
40. 40.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it will not break (c) it is hotter (d) it is magnetic

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