Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 117 · 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.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
2. 2.⚖️ 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 change it (c) we measure it
3. 3.⚖️ 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 same card (d) the way we turn it
4. 4.🔍 Which is the odd one out? (a) a fridge magnet (b) a medicine dropper (c) a vacuum cleaner (d) a suction hook
5. 5.True or false: a suction hook works by magnetism. (a) False (b) True
6. 6.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) juice likes plastic (c) air pushes it up (d) the straw is magnetic
7. 7.🧺 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) yeast (d) a stiff postcard
8. 8.🔍 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 card stays on (d) the glass breaks
9. 9.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
10. 10.⚖️ 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 the one thing we change. (a) False (b) True
11. 11.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a compass needle (c) a medicine dropper (d) a magnetic pin holder
12. 12.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) magnetism (b) air pressure
13. 13.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is heavier (c) it is hotter (d) it will not break
14. 14.⚖️ 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 change it (c) we measure it
15. 15.🥛 Which of these works by magnetism? (a) a fridge magnet (b) a drinking straw (c) a suction hook (d) a medicine dropper
16. 16.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) glue on the card (c) the cold water (d) air pushing up
17. 17.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) water is hiding there (c) the bottle is magnetic (d) air inside pushes back
18. 18.🔮 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
19. 19.⚖️ 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) the way we turn it (d) the same card
20. 20.🧺 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) turmeric powder (d) a towel
21. 21.🥛 Why is it best to fill the glass right to the top? (a) it looks nicer (b) water is heavier (c) little air left inside (d) the card gets wet
22. 22.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
23. 23.🧺 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 magnet (d) a glass of water
24. 24.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
25. 25.⚖️ 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
26. 26.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a battery cell (c) a balloon (d) a sink or a bucket
27. 27.True or false: a magnetic pin holder works by magnetism. (a) False (b) True
28. 28.⚖️ 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
29. 29.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
30. 30.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
31. 31.⚖️ 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 what we measure. (a) True (b) False
32. 32.🧺 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 balloon (d) a sink or a bucket
33. 33.🔍 Which is the odd one out? (a) a drinking straw (b) a bicycle pump (c) a medicine dropper (d) a magnetic pin holder
34. 34.True or false: a vacuum cleaner works by magnetism. (a) False (b) True
35. 35.True or false: a magnetic chess set works by magnetism. (a) False (b) True
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) the same card (c) how full the glass is
37. 37.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a magnet (b) a towel (c) a stiff postcard (d) a glass of water
38. 38.True or false: a towel is not needed for the card-on-a-glass trick. (a) False (b) True
39. 39.🔍 Which is the odd one out? (a) a drinking straw (b) a vacuum cleaner (c) a suction hook (d) a compass needle
40. 40.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a magnetic pin holder (c) a suction hook (d) a drinking straw

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