Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 320 · 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.⚖️ 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 measure it (b) we change it (c) we keep it the same
2. 2.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the water turns to ice (b) the card flies away (c) the card stays on (d) the glass breaks
3. 3.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) a magnet (c) glue on the card (d) air pushing up
4. 4.True or false: a fridge magnet works by magnetism. (a) True (b) False
5. 5.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
6. 6.⚖️ 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
7. 7.True or false: yeast is not needed for the card-on-a-glass trick. (a) True (b) False
8. 8.⚖️ 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
9. 9.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
10. 10.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) air (c) sand (d) smoke
11. 11.⚖️ 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) whether the card stays (b) the same card (c) the way we turn it (d) how full the glass is
12. 12.🧺 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 battery cell (d) a sink or a bucket
13. 13.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) True (b) False
14. 14.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) yeast (b) a towel (c) a glass of water (d) a sink or a bucket
15. 15.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
16. 16.⚖️ 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
17. 17.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a sink or a bucket (c) yeast (d) a glass of water
18. 18.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic chess set (c) a fridge magnet (d) a medicine dropper
19. 19.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is heavier (c) it will not break (d) it is hotter
20. 20.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a compass needle (c) a magnetic pin holder (d) a suction hook
21. 21.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) air inside pushes back (c) the cap is sticky (d) water is hiding there
22. 22.🧺 Which of these is not needed for the card-on-a-glass trick? (a) turmeric powder (b) a sink or a bucket (c) a towel (d) a glass of water
23. 23.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
24. 24.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
25. 25.True or false: a glass of water is needed for the card-on-a-glass trick. (a) True (b) False
26. 26.⚖️ 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 glass (c) how full the glass is
27. 27.🧺 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 stiff postcard (d) a mirror
28. 28.True or false: a battery cell is needed for the card-on-a-glass trick. (a) False (b) True
29. 29.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
30. 30.🧺 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 balloon (d) a sink or a bucket
31. 31.🔍 Which is the odd one out? (a) a magnetic chess set (b) a bicycle pump (c) a compass needle (d) a magnetic pin holder
32. 32.🔍 Which is the odd one out? (a) a fridge magnet (b) a bicycle pump (c) a drinking straw (d) a vacuum cleaner
33. 33.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a towel (c) a battery cell (d) a balloon
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 same glass”? (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? Which of these is what we measure? (a) the same glass (b) how full the glass is (c) whether the card stays (d) the way we turn it
36. 36.⚖️ 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
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.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) False (b) True
39. 39.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is kept the same. (a) True (b) False
40. 40.⚖️ 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

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