Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 706 · 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 stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
2. 2.🧺 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) a towel (d) a mirror
3. 3.🔍 Which is the odd one out? (a) a suction hook (b) a magnetic pin holder (c) a compass needle (d) a fridge magnet
4. 4.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
5. 5.True or false: a drinking straw works by magnetism. (a) True (b) False
6. 6.🧺 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 towel (d) a balloon
7. 7.🧺 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) a battery cell (d) a glass of water
8. 8.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
9. 9.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) the cap is sticky (c) water is hiding there (d) air inside pushes back
10. 10.True or false: yeast is needed for the card-on-a-glass trick. (a) False (b) True
11. 11.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a battery cell (c) a magnet (d) a stiff postcard
12. 12.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
13. 13.🥛 What holds the card up against the upside-down glass? (a) air pushing up (b) a magnet (c) glue on the card (d) the cold water
14. 14.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is hotter (c) it is magnetic (d) it will not break
15. 15.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
16. 16.True or false: a drinking straw works by air pressure. (a) True (b) False
17. 17.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
18. 18.⚖️ 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 kept the same. (a) False (b) True
19. 19.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is magnetic (b) juice likes plastic (c) air pushes it up (d) the straw is hot
20. 20.⚖️ 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 the one thing we change. (a) False (b) True
21. 21.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a suction hook (c) a bicycle pump (d) a fridge magnet
22. 22.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a magnetic chess set (c) a bicycle pump (d) a compass needle
23. 23.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
24. 24.🔮 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 catch any spills (d) to grow plants
25. 25.True or false: a magnetic pin holder works by air pressure. (a) False (b) True
26. 26.True or false: a mirror is not needed for the card-on-a-glass trick. (a) False (b) True
27. 27.True or false: a magnetic pin holder works by magnetism. (a) False (b) True
28. 28.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
29. 29.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure
30. 30.🔍 Which is the odd one out? (a) a drinking straw (b) a magnetic pin holder (c) a vacuum cleaner (d) a suction hook
31. 31.⚖️ 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 change it (c) we measure it
32. 32.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) it looks nicer (c) little air left inside (d) the card gets wet
33. 33.🥛 Which of these works by magnetism? (a) a drinking straw (b) a suction hook (c) a magnetic pin holder (d) a bicycle pump
34. 34.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
35. 35.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
36. 36.⚖️ 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) how full the glass is (c) the same card
37. 37.🧺 Which of these is needed for the card-on-a-glass trick? (a) a towel (b) a balloon (c) a mirror (d) yeast
38. 38.⚖️ 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 glass (c) whether the card stays (d) the same card
39. 39.⚖️ 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) True (b) False
40. 40.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a stiff postcard (c) a glass of water (d) a magnet

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