Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 76 · 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.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
2. 2.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) True (b) False
3. 3.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a mirror (c) a balloon (d) a sink or a bucket
4. 4.⚖️ 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 change it (b) we measure it (c) we keep it the same
5. 5.⚖️ 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 the one thing we change. (a) True (b) False
6. 6.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) True (b) False
7. 7.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
8. 8.⚖️ 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) whether the card stays (b) how full the glass is (c) the same glass (d) the same card
9. 9.⚖️ 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) how full the glass is (c) the same glass (d) whether the card stays
10. 10.True or false: a towel is needed for the card-on-a-glass trick. (a) True (b) False
11. 11.True or false: yeast is not needed for the card-on-a-glass trick. (a) True (b) False
12. 12.🥛 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
13. 13.⚖️ 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 what we measure. (a) False (b) True
14. 14.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is heavier (c) it is hotter (d) it will not break
15. 15.⚖️ 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) how full the glass is (c) the same card
16. 16.🔍 Which is the odd one out? (a) a compass needle (b) a drinking straw (c) a vacuum cleaner (d) a medicine dropper
17. 17.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) water is hiding there (c) the cap is sticky (d) air inside pushes back
18. 18.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure
19. 19.True or false: a fridge magnet works by magnetism. (a) True (b) False
20. 20.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a battery cell (c) a balloon (d) a towel
21. 21.True or false: a glass of water is needed for the card-on-a-glass trick. (a) True (b) False
22. 22.True or false: a magnet is needed for the card-on-a-glass trick. (a) True (b) False
23. 23.🧺 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 stiff postcard (c) a glass of water (d) a mirror
24. 24.⚖️ 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
25. 25.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
26. 26.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
27. 27.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card flies away (b) the glass breaks (c) the card stays on (d) the water turns to ice
28. 28.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) over a sink or bucket (c) near a plug point (d) over a laptop
29. 29.🥛 Which of these works by magnetism? (a) a compass needle (b) a bicycle pump (c) a drinking straw (d) a suction hook
30. 30.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) True (b) False
31. 31.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a glass of water (c) a stiff postcard (d) turmeric powder
32. 32.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is the one thing we change. (a) False (b) True
33. 33.🧺 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) yeast (d) a stiff postcard
34. 34.🔍 Which is the odd one out? (a) a drinking straw (b) a magnetic pin holder (c) a compass needle (d) a fridge magnet
35. 35.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) air pressure (b) magnetism
36. 36.True or false: a mirror is not needed for the card-on-a-glass trick. (a) True (b) False
37. 37.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) False (b) True
38. 38.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a bicycle pump (c) a drinking straw (d) a magnetic pin holder
39. 39.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
40. 40.📘 Air presses on everything around us. What is this push called? (a) friction (b) air pressure (c) sunlight (d) magnetism

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