Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 536 · 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.🥛 What holds the card up against the upside-down glass? (a) air pushing up (b) a magnet (c) the cold water (d) glue on the card
2. 2.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) air pressure (b) magnetism
3. 3.⚖️ 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
4. 4.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) False (b) True
5. 5.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) yeast (c) a sink or a bucket (d) a towel
6. 6.📘 Air presses on everything around us. What is this push called? (a) magnetism (b) air pressure (c) sunlight (d) friction
7. 7.🔍 Which is the odd one out? (a) a suction hook (b) a bicycle pump (c) a vacuum cleaner (d) a compass needle
8. 8.True or false: a towel is needed for the card-on-a-glass trick. (a) False (b) True
9. 9.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) air inside pushes back (c) the bottle is magnetic (d) the cap is sticky
10. 10.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a balloon (c) a battery cell (d) a stiff postcard
11. 11.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
12. 12.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) sand (c) water (d) smoke
13. 13.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is hotter (c) it is heavier (d) it is magnetic
14. 14.⚖️ 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
15. 15.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) False (b) True
16. 16.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
17. 17.⚖️ 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) the way we turn it (b) how full the glass is (c) whether the card stays
18. 18.🔍 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 glass breaks (d) the card stays on
19. 19.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) air pressure (b) magnetism
20. 20.🥛 Which of these works by magnetism? (a) a suction hook (b) a magnetic pin holder (c) a bicycle pump (d) a vacuum cleaner
21. 21.🧺 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 magnet (d) a towel
22. 22.True or false: a drinking straw works by air pressure. (a) False (b) True
23. 23.🔍 Which is the odd one out? (a) a medicine dropper (b) a fridge magnet (c) a magnetic pin holder (d) a magnetic chess set
24. 24.⚖️ 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
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) whether the card stays (b) the same card (c) how full the glass is
26. 26.🔍 Which is the odd one out? (a) a suction hook (b) a bicycle pump (c) a vacuum cleaner (d) a magnetic pin holder
27. 27.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a balloon (c) a glass of water (d) yeast
28. 28.⚖️ 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) True (b) False
29. 29.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
30. 30.True or false: a magnetic pin holder works by magnetism. (a) True (b) False
31. 31.🧺 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 glass of water (d) turmeric powder
32. 32.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) over a laptop (c) over a sink or bucket (d) near a plug point
33. 33.⚖️ 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 change it (b) we measure it (c) we keep it the same
34. 34.🧺 Which of these is needed for the card-on-a-glass trick? (a) a towel (b) a mirror (c) a magnet (d) yeast
35. 35.🔮 Why do we try the card trick over a sink or a bucket? (a) to catch any spills (b) to grow plants (c) to make it rain (d) to cool the glass
36. 36.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
37. 37.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic pin holder (c) a bicycle pump (d) a magnetic chess set
38. 38.True or false: a towel is not needed for the card-on-a-glass trick. (a) True (b) False
39. 39.⚖️ 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) False (b) True
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 what we measure. (a) True (b) False

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