Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 284 · 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.🛟 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
2. 2.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a drinking straw (c) a compass needle (d) a vacuum cleaner
3. 3.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a magnet (c) a glass of water (d) a stiff postcard
4. 4.🔍 Which is the odd one out? (a) a suction hook (b) a magnetic chess set (c) a fridge magnet (d) a compass needle
5. 5.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) not needed (b) needed
6. 6.📘 Air presses on everything around us. What is this push called? (a) sunlight (b) friction (c) magnetism (d) air pressure
7. 7.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a balloon (c) a glass of water (d) a stiff postcard
8. 8.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) glue on the card (c) air pushing up (d) a magnet
9. 9.True or false: a magnet is not needed for the card-on-a-glass trick. (a) False (b) True
10. 10.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) True (b) False
11. 11.⚖️ 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) True (b) False
12. 12.🥛 Which of these works by air pressure? (a) a bicycle pump (b) a magnetic chess set (c) a fridge magnet (d) a compass needle
13. 13.⚖️ 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) whether the card stays (c) the same glass (d) how full the glass is
14. 14.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a drinking straw (c) a compass needle (d) a medicine dropper
15. 15.True or false: a battery cell is needed for the card-on-a-glass trick. (a) False (b) True
16. 16.True or false: a fridge magnet works by air pressure. (a) True (b) False
17. 17.🛟 Where should you do the card-and-glass trick? (a) over a sink or bucket (b) over a laptop (c) near a plug point (d) on a bed
18. 18.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) water is heavier (c) little air left inside (d) it looks nicer
19. 19.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
20. 20.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a suction hook (c) a compass needle (d) a fridge magnet
21. 21.True or false: a vacuum cleaner 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? What do we do with “the same glass”? (a) we measure it (b) we change it (c) we keep it the same
23. 23.⚖️ 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) False (b) True
24. 24.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
25. 25.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
26. 26.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a medicine dropper (c) a compass needle (d) a magnetic chess set
27. 27.⚖️ 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
28. 28.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) magnetism (b) air pressure
29. 29.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
30. 30.True or false: a fridge magnet works by magnetism. (a) False (b) True
31. 31.⚖️ 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
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 what we measure. (a) True (b) False
33. 33.🔍 Which is the odd one out? (a) a bicycle pump (b) a magnetic pin holder (c) a compass needle (d) a fridge magnet
34. 34.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a mirror (c) a towel (d) a stiff postcard
35. 35.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a stiff postcard (c) yeast (d) a towel
36. 36.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) the cap is sticky (c) air inside pushes back (d) water is hiding there
37. 37.🥛 Which of these works by magnetism? (a) a suction hook (b) a vacuum cleaner (c) a magnetic pin holder (d) a drinking straw
38. 38.⚖️ 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) True (b) False
39. 39.⚖️ 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 change it (c) we measure it
40. 40.True or false: a towel is not needed for the card-on-a-glass trick. (a) True (b) False

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