Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 725 · 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 way we turn it”? (a) we change it (b) we keep it the same (c) we measure it
2. 2.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
3. 3.⚖️ 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) how full the glass is (c) whether the card stays
4. 4.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) it looks nicer (c) water is heavier (d) little air left inside
5. 5.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) False (b) True
6. 6.🔍 Which is the odd one out? (a) a drinking straw (b) a bicycle pump (c) a suction hook (d) a fridge magnet
7. 7.⚖️ 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
8. 8.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) over a laptop (c) near a plug point (d) over a sink or bucket
9. 9.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is magnetic (b) juice likes plastic (c) the straw is hot (d) air pushes it up
10. 10.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
11. 11.⚖️ 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) False (b) True
12. 12.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a battery cell (b) a stiff postcard (c) a sink or a bucket (d) a towel
13. 13.True or false: a suction hook works by magnetism. (a) False (b) True
14. 14.🥛 What holds the card up against the upside-down glass? (a) air pushing up (b) the cold water (c) a magnet (d) glue on the card
15. 15.True or false: a magnetic chess set works by magnetism. (a) False (b) True
16. 16.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) True (b) False
17. 17.True or false: yeast is needed for the card-on-a-glass trick. (a) True (b) False
18. 18.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a sink or a bucket (b) yeast (c) a towel (d) a glass of water
19. 19.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
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) the way we turn it (b) how full the glass is (c) the same glass (d) whether the card stays
21. 21.⚖️ 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 card (b) whether the card stays (c) how full the glass is (d) the same glass
22. 22.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
23. 23.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to grow plants (c) to make it rain (d) to catch any spills
24. 24.True or false: a glass of water is needed for the card-on-a-glass trick. (a) True (b) False
25. 25.⚖️ 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
26. 26.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic chess set (c) a fridge magnet (d) a medicine dropper
27. 27.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
28. 28.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
29. 29.⚖️ 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
30. 30.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a sink or a bucket (c) a mirror (d) a towel
31. 31.True or false: a vacuum cleaner works by air pressure. (a) False (b) True
32. 32.🧺 Which of these is needed for the card-on-a-glass trick? (a) a stiff postcard (b) a battery cell (c) yeast (d) a mirror
33. 33.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a stiff postcard (c) a magnet (d) a glass of water
34. 34.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a mirror (b) a towel (c) a sink or a bucket (d) a glass of water
35. 35.🔍 Which is the odd one out? (a) a medicine dropper (b) a suction hook (c) a bicycle pump (d) a magnetic pin holder
36. 36.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a fridge magnet (c) a compass needle (d) a suction hook
37. 37.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a compass needle (c) a drinking straw (d) a bicycle pump
38. 38.True or false: a towel is not needed for the card-on-a-glass trick. (a) False (b) True
39. 39.⚖️ 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
40. 40.True or false: a medicine dropper works by air pressure. (a) False (b) True

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