Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 423 · 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.🧺 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 magnet (d) a stiff postcard
2. 2.🧺 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) a towel (d) a balloon
3. 3.⚖️ 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) the same glass (c) the way we turn it (d) how full the glass is
4. 4.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a towel (c) a magnet (d) a glass of water
5. 5.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card stays on (b) the card flies away (c) the glass breaks (d) the water turns to ice
6. 6.⚖️ 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) True (b) False
7. 7.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a mirror (b) a sink or a bucket (c) a towel (d) a glass of water
8. 8.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) a magnet (c) the cold water (d) air pushing up
9. 9.🔍 Which is the odd one out? (a) a bicycle pump (b) a magnetic chess set (c) a magnetic pin holder (d) a fridge magnet
10. 10.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
11. 11.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) a stiff postcard (c) a mirror (d) yeast
12. 12.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to make it rain (c) to catch any spills (d) to cool the glass
13. 13.True or false: a magnet is not needed for the card-on-a-glass trick. (a) True (b) False
14. 14.🛟 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
15. 15.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
16. 16.📘 Air presses on everything around us. What is this push called? (a) friction (b) magnetism (c) air pressure (d) sunlight
17. 17.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
18. 18.True or false: a vacuum cleaner works by air pressure. (a) True (b) False
19. 19.⚖️ 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
20. 20.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a balloon (c) a stiff postcard (d) a sink or a bucket
21. 21.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) the bottle is magnetic (c) the cap is sticky (d) water is hiding there
22. 22.⚖️ 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
23. 23.True or false: a battery cell is needed for the card-on-a-glass trick. (a) True (b) False
24. 24.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a battery cell (c) a sink or a bucket (d) a balloon
25. 25.⚖️ 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 measure it (b) we keep it the same (c) we change it
26. 26.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a suction hook (c) a magnetic pin holder (d) a bicycle pump
27. 27.⚖️ 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 way we turn it (d) whether the card stays
28. 28.🥛 Which of these works by magnetism? (a) a compass needle (b) a drinking straw (c) a bicycle pump (d) a vacuum cleaner
29. 29.True or false: a magnetic pin holder works by magnetism. (a) True (b) False
30. 30.🔍 Which is the odd one out? (a) a magnetic chess set (b) a suction hook (c) a bicycle pump (d) a drinking straw
31. 31.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) True (b) False
32. 32.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
33. 33.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a mirror (c) a towel (d) a balloon
34. 34.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
35. 35.True or false: a vacuum cleaner 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? Which of these is kept the same? (a) the same glass (b) whether the card stays (c) how full the glass is
37. 37.⚖️ 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 keep it the same (c) we change it
38. 38.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
39. 39.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) air (c) smoke (d) sand
40. 40.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True

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