Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 149 · 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.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to make it rain (c) to grow plants (d) to catch any spills
2. 2.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) False (b) True
3. 3.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
4. 4.🥛 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
5. 5.⚖️ 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) the way we turn it (c) whether the card stays
6. 6.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a bicycle pump (c) a magnetic chess set (d) a fridge magnet
7. 7.🧺 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) yeast (d) a stiff postcard
8. 8.🧺 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 battery cell (d) a stiff postcard
9. 9.🔍 Which is the odd one out? (a) a magnetic chess set (b) a magnetic pin holder (c) a fridge magnet (d) a bicycle pump
10. 10.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
11. 11.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) turmeric powder (c) a towel (d) a sink or a bucket
12. 12.True or false: a drinking straw works by magnetism. (a) True (b) False
13. 13.⚖️ 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 card (b) how full the glass is (c) whether the card stays (d) the same glass
14. 14.True or false: a drinking straw works by air pressure. (a) False (b) True
15. 15.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
16. 16.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) sand (c) smoke (d) water
17. 17.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) True (b) False
18. 18.🥛 Does a drinking straw 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? True or false: the same card is what we measure. (a) False (b) True
20. 20.True or false: a mirror is not needed for the card-on-a-glass trick. (a) True (b) False
21. 21.⚖️ 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 what we measure. (a) True (b) False
22. 22.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) the cap is sticky (c) the bottle is magnetic (d) air inside pushes back
23. 23.⚖️ 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 measure it (c) we change it
24. 24.🧺 Which of these is needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a magnet (c) yeast (d) turmeric powder
25. 25.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) over a sink or bucket (c) near a plug point (d) on a bed
26. 26.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card flies away (b) the water turns to ice (c) the glass breaks (d) the card stays on
27. 27.⚖️ 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) True (b) False
28. 28.⚖️ 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 measure it (b) we change it (c) we keep it the same
29. 29.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) the cold water (c) a magnet (d) air pushing up
30. 30.⚖️ 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) False (b) True
31. 31.📘 Air presses on everything around us. What is this push called? (a) air pressure (b) sunlight (c) friction (d) magnetism
32. 32.True or false: a fridge magnet works by magnetism. (a) True (b) False
33. 33.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
34. 34.🛟 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
35. 35.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) air pressure (b) magnetism
36. 36.True or false: a battery cell is needed for the card-on-a-glass trick. (a) False (b) True
37. 37.True or false: a magnet is needed for the card-on-a-glass trick. (a) True (b) False
38. 38.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
39. 39.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a magnet (b) a sink or a bucket (c) a glass of water (d) a towel
40. 40.🧺 Which of these is needed for the card-on-a-glass trick? (a) a stiff postcard (b) yeast (c) turmeric powder (d) a balloon

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