Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 287 · 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.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is kept the same. (a) False (b) True
2. 2.⚖️ 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) False (b) True
3. 3.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is hotter (c) it will not break (d) it is magnetic
4. 4.📘 Air presses on everything around us. What is this push called? (a) sunlight (b) friction (c) air pressure (d) magnetism
5. 5.True or false: a balloon is not needed for the card-on-a-glass trick. (a) False (b) True
6. 6.🔮 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
7. 7.🔍 Which is the odd one out? (a) a bicycle pump (b) a medicine dropper (c) a fridge magnet (d) a vacuum cleaner
8. 8.🛟 Where should you do the card-and-glass trick? (a) over a sink or bucket (b) on a bed (c) over a laptop (d) near a plug point
9. 9.True or false: a suction hook works by magnetism. (a) True (b) False
10. 10.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
11. 11.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a balloon (b) a stiff postcard (c) a towel (d) a glass of water
12. 12.🥤 Why does juice go up a drinking straw when you sip? (a) juice likes plastic (b) the straw is magnetic (c) air pushes it up (d) the straw is hot
13. 13.⚖️ 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) False (b) True
14. 14.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
15. 15.⚖️ 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 measure it (c) we change it
16. 16.⚖️ 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
17. 17.⚖️ 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
18. 18.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a glass of water (c) a sink or a bucket (d) a magnet
19. 19.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a mirror (c) yeast (d) a sink or a bucket
20. 20.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a battery cell (c) a glass of water (d) a balloon
21. 21.🧺 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 glass of water (c) a battery cell (d) a towel
22. 22.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
23. 23.True or false: yeast is needed for the card-on-a-glass trick. (a) False (b) True
24. 24.🔍 Which is the odd one out? (a) a magnetic chess set (b) a magnetic pin holder (c) a compass needle (d) a vacuum cleaner
25. 25.🔍 Which is the odd one out? (a) a medicine dropper (b) a bicycle pump (c) a suction hook (d) a magnetic pin holder
26. 26.True or false: a medicine dropper works by magnetism. (a) False (b) True
27. 27.🔍 Which is the odd one out? (a) a medicine dropper (b) a magnetic chess set (c) a bicycle pump (d) a vacuum cleaner
28. 28.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a glass of water (c) turmeric powder (d) a stiff postcard
29. 29.🥛 Which of these works by air pressure? (a) a compass needle (b) a suction hook (c) a fridge magnet (d) a magnetic pin holder
30. 30.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
31. 31.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) air pressure (b) magnetism
32. 32.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) the cold water (c) glue on the card (d) air pushing up
33. 33.⚖️ 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) True (b) False
34. 34.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
35. 35.True or false: a mirror is needed for the card-on-a-glass trick. (a) True (b) False
36. 36.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
37. 37.🥛 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
38. 38.🔍 Which is the odd one out? (a) a drinking straw (b) a medicine dropper (c) a suction hook (d) a compass needle
39. 39.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to grow plants (c) to make it rain (d) to catch any spills
40. 40.⚖️ 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 measure it (c) we change it

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