Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 663 · 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.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) the bottle is magnetic (c) air inside pushes back (d) the cap is sticky
2. 2.True or false: a compass needle works by air pressure. (a) False (b) True
3. 3.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) False (b) True
4. 4.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
5. 5.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
6. 6.⚖️ 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 change it (c) we measure it
7. 7.🥛 Does a compass needle work by air pressure or by magnetism? (a) magnetism (b) air pressure
8. 8.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
9. 9.🔍 Which is the odd one out? (a) a fridge magnet (b) a drinking straw (c) a compass needle (d) a magnetic pin holder
10. 10.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
11. 11.True or false: a balloon is needed for the card-on-a-glass trick. (a) True (b) False
12. 12.🧺 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 magnet (c) a towel (d) a stiff postcard
13. 13.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
14. 14.🧺 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 battery cell
15. 15.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) water (c) sand (d) smoke
16. 16.🧺 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 towel (d) yeast
17. 17.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a battery cell (c) turmeric powder (d) a stiff postcard
18. 18.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
19. 19.True or false: a battery cell is needed for the card-on-a-glass trick. (a) False (b) True
20. 20.True or false: a towel is not needed for the card-on-a-glass trick. (a) False (b) True
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 what we measure. (a) True (b) False
22. 22.True or false: a suction hook works by air pressure. (a) False (b) True
23. 23.📘 Air presses on everything around us. What is this push called? (a) sunlight (b) air pressure (c) friction (d) magnetism
24. 24.⚖️ 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
25. 25.⚖️ 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 same glass (c) whether the card stays
26. 26.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a battery cell (c) a balloon (d) a glass of water
27. 27.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a fridge magnet (c) a magnetic chess set (d) a vacuum cleaner
28. 28.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
29. 29.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is heavier (c) it is magnetic (d) it will not break
30. 30.🥛 What holds the card up against the upside-down glass? (a) air pushing up (b) a magnet (c) glue on the card (d) the cold water
31. 31.⚖️ 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) how full the glass is (c) whether the card stays (d) the same card
32. 32.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
33. 33.True or false: a compass needle works by magnetism. (a) True (b) False
34. 34.⚖️ 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
35. 35.⚖️ 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 kept the same. (a) True (b) False
36. 36.⚖️ 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
37. 37.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a sink or a bucket (c) a mirror (d) a towel
38. 38.🔍 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 stays on (c) the card flies away (d) the water turns to ice
39. 39.⚖️ 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) whether the card stays (b) the same card (c) how full the glass is
40. 40.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a suction hook (c) a drinking straw (d) a fridge magnet

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