Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 538 · 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 is the odd one out? (a) a magnetic pin holder (b) a drinking straw (c) a magnetic chess set (d) a fridge magnet
2. 2.True or false: a towel is needed for the card-on-a-glass trick. (a) False (b) True
3. 3.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is magnetic (c) it will not break (d) it is heavier
4. 4.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) a magnet (c) the cold water (d) air pushing up
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 what we measure. (a) False (b) True
6. 6.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to cool the glass (c) to make it rain (d) to catch any spills
7. 7.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) yeast (b) a stiff postcard (c) a towel (d) a glass of water
8. 8.🧺 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 magnet (d) a sink or a bucket
9. 9.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a drinking straw (c) a fridge magnet (d) a vacuum cleaner
10. 10.True or false: a suction hook works by air pressure. (a) False (b) True
11. 11.🧺 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 balloon (c) a glass of water (d) a stiff postcard
12. 12.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) on a bed (c) over a sink or bucket (d) over a laptop
13. 13.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a drinking straw (c) a magnetic pin holder (d) a magnetic chess set
14. 14.🥛 Why is it best to fill the glass right to the top? (a) it looks nicer (b) little air left inside (c) water is heavier (d) the card gets wet
15. 15.True or false: a magnet is needed for the card-on-a-glass trick. (a) True (b) False
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 battery cell (d) a glass of water
17. 17.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) the bottle is magnetic (c) water is hiding there (d) the cap is sticky
18. 18.⚖️ 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) whether the card stays (b) how full the glass is (c) the same card (d) the way we turn it
19. 19.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is the one thing we change. (a) False (b) True
20. 20.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
21. 21.True or false: a medicine dropper works by air pressure. (a) True (b) False
22. 22.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) air (c) smoke (d) sand
23. 23.⚖️ 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 same card (c) whether the card stays
24. 24.🔍 Which is the odd one out? (a) a suction hook (b) a medicine dropper (c) a bicycle pump (d) a fridge magnet
25. 25.🔍 Which is the odd one out? (a) a magnetic chess set (b) a magnetic pin holder (c) a compass needle (d) a suction hook
26. 26.🔍 Which is the odd one out? (a) a bicycle pump (b) a drinking straw (c) a magnetic chess set (d) a vacuum cleaner
27. 27.⚖️ 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) how full the glass is (d) the way we turn it
28. 28.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
29. 29.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
30. 30.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) False (b) True
31. 31.🧺 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) a battery cell
32. 32.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
33. 33.🔍 Which is the odd one out? (a) a drinking straw (b) a magnetic pin holder (c) a bicycle pump (d) a vacuum cleaner
34. 34.⚖️ 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 change it (b) we keep it the same (c) we measure it
35. 35.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a mirror (c) a magnet (d) a glass of water
36. 36.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a towel (c) a magnet (d) yeast
37. 37.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a stiff postcard (c) a sink or a bucket (d) a balloon
38. 38.⚖️ 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
39. 39.⚖️ 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 measure it (b) we keep it the same (c) we change it
40. 40.⚖️ 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) False (b) True

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