Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 829 · 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.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
2. 2.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) True (b) False
3. 3.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) smoke (c) sand (d) air
4. 4.🧺 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 glass of water (d) a battery cell
5. 5.🛟 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
6. 6.🔍 Which is the odd one out? (a) a bicycle pump (b) a suction hook (c) a magnetic chess set (d) a vacuum cleaner
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) a sink or a bucket (d) yeast
8. 8.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) water is hiding there (c) the cap is sticky (d) the bottle is magnetic
9. 9.⚖️ 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
10. 10.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a magnet (b) a towel (c) a sink or a bucket (d) a stiff postcard
11. 11.🔮 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 catch any spills (d) to grow plants
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.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a magnetic chess set (c) a drinking straw (d) a bicycle pump
15. 15.⚖️ 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
16. 16.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) water is heavier (c) it looks nicer (d) little air left inside
17. 17.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) yeast (c) a glass of water (d) a battery cell
18. 18.⚖️ 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 change it (b) we measure it (c) we keep it the same
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 same glass (b) the same card (c) the way we turn it (d) how full the glass is
20. 20.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a magnetic chess set (c) a fridge magnet (d) a compass needle
21. 21.True or false: a compass needle works by magnetism. (a) True (b) False
22. 22.True or false: a magnetic pin holder works by air pressure. (a) False (b) True
23. 23.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a vacuum cleaner (c) a magnetic chess set (d) a magnetic pin holder
24. 24.True or false: a medicine dropper works by magnetism. (a) True (b) False
25. 25.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic chess set (c) a magnetic pin holder (d) a suction hook
26. 26.True or false: a magnet is not needed for the card-on-a-glass trick. (a) True (b) False
27. 27.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a suction hook (c) a medicine dropper (d) a compass needle
28. 28.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) a magnet (c) air pushing up (d) the cold water
29. 29.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a glass of water (c) a battery cell (d) a towel
30. 30.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: how full the glass is is the one thing we change. (a) True (b) False
31. 31.🔍 Which is the odd one out? (a) a compass needle (b) a fridge magnet (c) a magnetic pin holder (d) a drinking straw
32. 32.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a glass of water (c) a stiff postcard (d) a mirror
33. 33.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “whether the card stays”? (a) we keep it the same (b) we change it (c) we measure it
34. 34.True or false: a bicycle pump works by air pressure. (a) True (b) False
35. 35.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
36. 36.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
37. 37.⚖️ 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
38. 38.🧺 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 sink or a bucket (d) a mirror
39. 39.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) air pressure (b) magnetism
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 the one thing we change. (a) False (b) True

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