Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 731 · 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 works by air pressure? (a) a magnetic pin holder (b) a compass needle (c) a fridge magnet (d) a drinking straw
2. 2.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
3. 3.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a stiff postcard (c) a balloon (d) yeast
4. 4.📘 Air presses on everything around us. What is this push called? (a) magnetism (b) sunlight (c) air pressure (d) friction
5. 5.🛟 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
6. 6.⚖️ 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 way we turn it (b) whether the card stays (c) the same glass (d) how full the glass is
7. 7.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
8. 8.⚖️ 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
9. 9.⚖️ 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
10. 10.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
11. 11.⚖️ 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
12. 12.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a balloon (c) a glass of water (d) a towel
13. 13.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
14. 14.⚖️ 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) the same card (c) the same glass (d) how full the glass is
15. 15.🥛 Which of these works by magnetism? (a) a drinking straw (b) a compass needle (c) a medicine dropper (d) a suction hook
16. 16.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to grow plants (c) to catch any spills (d) to cool the glass
17. 17.True or false: a vacuum cleaner works by magnetism. (a) False (b) True
18. 18.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) juice likes plastic (c) the straw is magnetic (d) air pushes it up
19. 19.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) turmeric powder (b) a towel (c) a glass of water (d) a stiff postcard
20. 20.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is what we measure. (a) False (b) True
21. 21.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
22. 22.⚖️ 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 change it (b) we measure it (c) we keep it the same
23. 23.🧺 Which of these is needed for the card-on-a-glass trick? (a) a towel (b) a mirror (c) a magnet (d) a balloon
24. 24.True or false: a balloon is needed for the card-on-a-glass trick. (a) True (b) False
25. 25.🔍 Which is the odd one out? (a) a medicine dropper (b) a vacuum cleaner (c) a compass needle (d) a drinking straw
26. 26.🥛 What holds the card up against the upside-down glass? (a) air pushing up (b) the cold water (c) a magnet (d) glue on the card
27. 27.⚖️ 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) True (b) False
28. 28.🔮 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) water is hiding there (d) the bottle is magnetic
29. 29.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it will not break (c) it is heavier (d) it is hotter
30. 30.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a compass needle (c) a magnetic pin holder (d) a suction hook
31. 31.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a sink or a bucket (c) a towel (d) a balloon
32. 32.🧺 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 stiff postcard
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) how full the glass is (b) whether the card stays (c) the same glass
34. 34.🧺 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 battery cell (d) a towel
35. 35.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a sink or a bucket (c) yeast (d) turmeric powder
36. 36.⚖️ 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
37. 37.True or false: a medicine dropper works by air pressure. (a) False (b) True
38. 38.True or false: a magnet is not needed for the card-on-a-glass trick. (a) False (b) True
39. 39.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) air pressure (b) magnetism
40. 40.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed

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