Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 256 · 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 is the odd one out? (a) a drinking straw (b) a vacuum cleaner (c) a bicycle pump (d) a compass needle
2. 2.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
3. 3.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a drinking straw (c) a medicine dropper (d) a vacuum cleaner
4. 4.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
5. 5.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) yeast (c) a glass of water (d) turmeric powder
6. 6.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic pin holder (c) a suction hook (d) a magnetic chess set
7. 7.True or false: a battery cell is needed for the card-on-a-glass trick. (a) True (b) False
8. 8.📘 Air presses on everything around us. What is this push called? (a) air pressure (b) magnetism (c) sunlight (d) friction
9. 9.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a balloon (b) a towel (c) a stiff postcard (d) a glass of water
10. 10.🔮 Why do we try the card trick over a sink or a bucket? (a) to catch any spills (b) to make it rain (c) to grow plants (d) to cool the glass
11. 11.True or false: a mirror is needed for the card-on-a-glass trick. (a) True (b) False
12. 12.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
13. 13.⚖️ 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
14. 14.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) True (b) False
15. 15.True or false: a magnetic pin holder 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 towel (c) a sink or a bucket (d) a battery cell
17. 17.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) water is hiding there (c) the cap is sticky (d) air inside pushes back
18. 18.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) the cold water (c) air pushing up (d) a magnet
19. 19.🔍 Which is the odd one out? (a) a magnetic chess set (b) a magnetic pin holder (c) a bicycle pump (d) a fridge magnet
20. 20.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) sand (c) smoke (d) air
21. 21.⚖️ 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) False (b) True
22. 22.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic chess set (c) a magnetic pin holder (d) a medicine dropper
23. 23.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a sink or a bucket (c) a stiff postcard (d) a balloon
24. 24.⚖️ 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) how full the glass is (b) the same glass (c) the same card (d) whether the card stays
25. 25.⚖️ 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 way we turn it (c) the same card (d) how full the glass is
26. 26.⚖️ 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
27. 27.🔍 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 glass breaks (c) the card stays on (d) the water turns to ice
28. 28.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) little air left inside (c) it looks nicer (d) the card gets wet
29. 29.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a magnet (c) a towel (d) a glass of water
30. 30.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a stiff postcard (c) a glass of water (d) a magnet
31. 31.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic chess set (c) a fridge magnet (d) a vacuum cleaner
32. 32.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
33. 33.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
34. 34.True or false: a battery cell is not needed for the card-on-a-glass trick. (a) False (b) True
35. 35.True or false: a magnetic chess set works by magnetism. (a) False (b) True
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 change it (b) we keep it the same (c) we measure it
37. 37.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a suction hook (c) a drinking straw (d) a magnetic chess set
38. 38.🥛 Which of these works by magnetism? (a) a magnetic chess set (b) a suction hook (c) a medicine dropper (d) a bicycle pump
39. 39.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) True (b) False
40. 40.🧺 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 mirror

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