Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 676 · 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.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a glass of water (c) a sink or a bucket (d) a balloon
2. 2.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is hotter (c) it is heavier (d) it will not break
3. 3.⚖️ 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 way we turn it (b) the same glass (c) whether the card stays (d) how full the glass is
4. 4.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
5. 5.True or false: a balloon is not needed for the card-on-a-glass trick. (a) True (b) False
6. 6.🔍 Which is the odd one out? (a) a compass needle (b) a drinking straw (c) a medicine dropper (d) a bicycle pump
7. 7.🔮 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
8. 8.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a battery cell (c) a towel (d) a mirror
9. 9.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
10. 10.True or false: a suction hook works by air pressure. (a) True (b) False
11. 11.🥛 Does a compass needle work by air pressure or by magnetism? (a) magnetism (b) air pressure
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 towel (c) a magnet (d) a glass of water
13. 13.True or false: a bicycle pump works by air pressure. (a) False (b) True
14. 14.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) a magnet (c) air pushing up (d) the cold water
15. 15.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
16. 16.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
17. 17.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) over a sink or bucket (c) on a bed (d) over a laptop
18. 18.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
19. 19.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) sand (c) smoke (d) air
20. 20.⚖️ 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) how full the glass is (b) the same card (c) the same glass (d) the way we turn it
21. 21.True or false: a magnetic chess set works by magnetism. (a) True (b) False
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.⚖️ 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 measure it (b) we keep it the same (c) we change it
24. 24.⚖️ 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
25. 25.True or false: a battery cell is needed for the card-on-a-glass trick. (a) True (b) False
26. 26.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a compass needle (c) a fridge magnet (d) a medicine dropper
27. 27.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
28. 28.True or false: a glass of water is needed for the card-on-a-glass trick. (a) True (b) False
29. 29.True or false: a balloon is needed for the card-on-a-glass trick. (a) True (b) False
30. 30.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a towel (c) a sink or a bucket (d) a battery cell
31. 31.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a drinking straw (c) a fridge magnet (d) a bicycle pump
32. 32.⚖️ 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 the one thing we change. (a) True (b) False
33. 33.⚖️ 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
34. 34.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a magnetic pin holder (c) a medicine dropper (d) a drinking straw
35. 35.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
36. 36.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to catch any spills (c) to grow plants (d) to cool the glass
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 change it (b) we measure it (c) we keep it the same
38. 38.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) True (b) False
39. 39.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a balloon (c) a sink or a bucket (d) a glass of water
40. 40.📘 Air presses on everything around us. What is this push called? (a) air pressure (b) magnetism (c) friction (d) sunlight

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