Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 463 · 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 “the same glass”? (a) we change it (b) we keep it the same (c) we measure it
2. 2.⚖️ 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 card (b) whether the card stays (c) how full the glass is
3. 3.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a towel (c) a stiff postcard (d) a balloon
4. 4.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
5. 5.🥛 What holds the card up against the upside-down glass? (a) air pushing up (b) the cold water (c) glue on the card (d) a magnet
6. 6.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
7. 7.🥛 Which of these works by magnetism? (a) a drinking straw (b) a suction hook (c) a bicycle pump (d) a compass needle
8. 8.⚖️ 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) how full the glass is (c) the way we turn it (d) the same card
9. 9.🧺 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) yeast (d) a sink or a bucket
10. 10.⚖️ 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) the same card (c) the way we turn it (d) whether the card stays
11. 11.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it will not break (c) it is hotter (d) it is magnetic
12. 12.🥛 Which of these works by air pressure? (a) a compass needle (b) a magnetic pin holder (c) a magnetic chess set (d) a vacuum cleaner
13. 13.📘 Air presses on everything around us. What is this push called? (a) magnetism (b) sunlight (c) friction (d) air pressure
14. 14.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
15. 15.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) yeast (c) a sink or a bucket (d) a stiff postcard
16. 16.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
17. 17.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) sand (c) air (d) water
18. 18.⚖️ 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
19. 19.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a magnet (c) a towel (d) a stiff postcard
20. 20.True or false: a battery cell is needed for the card-on-a-glass trick. (a) True (b) False
21. 21.🔍 Which is the odd one out? (a) a bicycle pump (b) a medicine dropper (c) a vacuum cleaner (d) a magnetic chess set
22. 22.🥛 Why is it best to fill the glass right to the top? (a) water is heavier (b) the card gets wet (c) little air left inside (d) it looks nicer
23. 23.⚖️ 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 measure it (c) we change it
24. 24.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) False (b) True
25. 25.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) turmeric powder (c) a magnet (d) a glass of water
26. 26.🔮 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) the cap is sticky (d) air inside pushes back
27. 27.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a battery cell (c) a towel (d) yeast
28. 28.True or false: a bicycle pump works by air pressure. (a) True (b) False
29. 29.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
30. 30.🥛 Does a compass needle work by air pressure or by magnetism? (a) magnetism (b) air pressure
31. 31.⚖️ 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 what we measure. (a) True (b) False
32. 32.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a towel (c) a glass of water (d) turmeric powder
33. 33.🧺 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 balloon (d) a glass of water
34. 34.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic pin holder (c) a magnetic chess set (d) a drinking straw
35. 35.⚖️ 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 change it (c) we measure it
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 the one thing we change. (a) False (b) True
37. 37.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
38. 38.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
39. 39.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a battery cell (c) a stiff postcard (d) turmeric powder
40. 40.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a glass of water (c) a magnet (d) a sink or a bucket

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