Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 782 · 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 magnetic chess set works by air pressure. (a) False (b) True
2. 2.True or false: a vacuum cleaner works by air pressure. (a) False (b) True
3. 3.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
4. 4.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
5. 5.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
6. 6.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) near a plug point (c) over a sink or bucket (d) on a bed
7. 7.⚖️ 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 keep it the same (c) we measure it
8. 8.🧺 Which of these is needed for the card-on-a-glass trick? (a) a sink or a bucket (b) turmeric powder (c) yeast (d) a balloon
9. 9.⚖️ 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
10. 10.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is hotter (c) it is heavier (d) it is magnetic
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.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to grow plants (c) to cool the glass (d) to catch any spills
13. 13.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a sink or a bucket (c) a magnet (d) a stiff postcard
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 measure it (b) we change it (c) we keep it the same
15. 15.True or false: a drinking straw works by air pressure. (a) True (b) False
16. 16.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is the one thing we change. (a) True (b) False
17. 17.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) sand (c) water (d) smoke
18. 18.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
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) the way we turn it (b) whether the card stays (c) the same glass (d) how full the glass is
20. 20.🧺 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 sink or a bucket (d) a glass of water
21. 21.⚖️ 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
22. 22.🧺 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 sink or a bucket
23. 23.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) the cap is sticky (c) the bottle is magnetic (d) water is hiding there
24. 24.🥛 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
25. 25.True or false: a fridge magnet works by magnetism. (a) True (b) False
26. 26.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) True (b) False
27. 27.🔍 Which is the odd one out? (a) a fridge magnet (b) a bicycle pump (c) a magnetic pin holder (d) a compass needle
28. 28.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a balloon (c) a glass of water (d) a magnet
29. 29.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a stiff postcard (c) a towel (d) turmeric powder
30. 30.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
31. 31.⚖️ 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
32. 32.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
33. 33.⚖️ 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
34. 34.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a balloon (c) a glass of water (d) a towel
35. 35.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a stiff postcard (c) a towel (d) a battery cell
36. 36.True or false: a mirror is not needed for the card-on-a-glass trick. (a) False (b) True
37. 37.⚖️ 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 measure it (b) we change it (c) we keep it the same
38. 38.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
39. 39.🔍 Which is the odd one out? (a) a medicine dropper (b) a bicycle pump (c) a magnetic pin holder (d) a drinking straw
40. 40.🥛 Which of these works by air pressure? (a) a compass needle (b) a magnetic pin holder (c) a bicycle pump (d) a fridge magnet

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