Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 89 · 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.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
2. 2.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) smoke (c) water (d) sand
3. 3.True or false: a bicycle pump works by air pressure. (a) False (b) True
4. 4.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a glass of water (c) a mirror (d) a towel
5. 5.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a towel (c) a glass of water (d) a battery cell
6. 6.⚖️ 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
7. 7.🥛 Which of these works by magnetism? (a) a suction hook (b) a vacuum cleaner (c) a drinking straw (d) a fridge magnet
8. 8.⚖️ 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
9. 9.True or false: a magnet is not needed for the card-on-a-glass trick. (a) True (b) False
10. 10.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
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 the one thing we change. (a) True (b) False
12. 12.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is magnetic (c) it is heavier (d) it is hotter
13. 13.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) little air left inside (c) water is heavier (d) it looks nicer
14. 14.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the card flies away (c) the card stays on (d) the water turns to ice
15. 15.True or false: a compass needle works by air pressure. (a) False (b) True
16. 16.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a balloon (c) a stiff postcard (d) a sink or a bucket
17. 17.🔍 Which is the odd one out? (a) a magnetic chess set (b) a suction hook (c) a vacuum cleaner (d) a bicycle pump
18. 18.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a compass needle (c) a medicine dropper (d) a fridge magnet
19. 19.🧺 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 sink or a bucket (d) a glass of water
20. 20.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a sink or a bucket (c) a mirror (d) turmeric powder
21. 21.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) a magnet (c) air pushing up (d) glue on the card
22. 22.True or false: a towel is needed for the card-on-a-glass trick. (a) False (b) True
23. 23.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) True (b) False
24. 24.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a towel (c) a sink or a bucket (d) turmeric powder
25. 25.🔍 Which is the odd one out? (a) a compass needle (b) a fridge magnet (c) a magnetic pin holder (d) a drinking straw
26. 26.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) air pressure (b) magnetism
27. 27.🥤 Why does juice go up a drinking straw when you sip? (a) juice likes plastic (b) air pushes it up (c) the straw is hot (d) the straw is magnetic
28. 28.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) water is hiding there (c) the bottle is magnetic (d) air inside pushes back
29. 29.⚖️ 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
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 of these works by magnetism? (a) a bicycle pump (b) a medicine dropper (c) a magnetic pin holder (d) a drinking straw
32. 32.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
33. 33.🔍 Which is the odd one out? (a) a drinking straw (b) a compass needle (c) a bicycle pump (d) a suction hook
34. 34.⚖️ 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 kept the same. (a) False (b) True
35. 35.True or false: a towel is not needed for the card-on-a-glass trick. (a) False (b) True
36. 36.True or false: a suction hook works by air pressure. (a) True (b) False
37. 37.⚖️ 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) the way we turn it (c) the same card (d) whether the card stays
38. 38.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a magnet (b) a stiff postcard (c) a sink or a bucket (d) a towel
39. 39.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
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 card”? (a) we change it (b) we keep it the same (c) we measure it

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