Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 112 · 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 works by magnetism? (a) a vacuum cleaner (b) a medicine dropper (c) a drinking straw (d) a compass needle
2. 2.🥛 Why is it best to fill the glass right to the top? (a) it looks nicer (b) little air left inside (c) water is heavier (d) the card gets wet
3. 3.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a battery cell (c) a glass of water (d) a towel
4. 4.🔍 Which is the odd one out? (a) a magnetic chess set (b) a compass needle (c) a bicycle pump (d) a fridge magnet
5. 5.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) air (c) water (d) smoke
6. 6.⚖️ 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
7. 7.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
8. 8.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
9. 9.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a towel (c) a sink or a bucket (d) turmeric powder
10. 10.⚖️ 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
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) False (b) True
12. 12.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a drinking straw (c) a magnetic pin holder (d) a suction hook
13. 13.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a towel (c) a sink or a bucket (d) a mirror
14. 14.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
15. 15.True or false: a drinking straw works by air pressure. (a) False (b) True
16. 16.⚖️ 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 keep it the same (b) we change it (c) we measure it
17. 17.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
18. 18.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a glass of water (c) yeast (d) a battery cell
19. 19.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to make it rain (c) to catch any spills (d) to grow plants
20. 20.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a sink or a bucket (c) a towel (d) a magnet
21. 21.True or false: a vacuum cleaner works by magnetism. (a) True (b) False
22. 22.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
23. 23.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is kept the same. (a) False (b) True
24. 24.True or false: a medicine dropper works by magnetism. (a) True (b) False
25. 25.True or false: a glass of water is needed for the card-on-a-glass trick. (a) True (b) False
26. 26.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a bicycle pump (c) a magnetic chess set (d) a vacuum cleaner
27. 27.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
28. 28.True or false: a balloon is not needed for the card-on-a-glass trick. (a) True (b) False
29. 29.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
30. 30.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
31. 31.🧺 Which of these is needed for the card-on-a-glass trick? (a) a towel (b) a mirror (c) turmeric powder (d) a battery cell
32. 32.⚖️ 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) whether the card stays (b) how full the glass is (c) the way we turn it (d) the same card
33. 33.🔍 Which is the odd one out? (a) a suction hook (b) a vacuum cleaner (c) a drinking straw (d) a compass needle
34. 34.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) air pushing up (c) a magnet (d) glue on the card
35. 35.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
36. 36.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) False (b) True
37. 37.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a towel (c) a balloon (d) a sink or a bucket
38. 38.⚖️ 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
39. 39.True or false: a balloon is needed for the card-on-a-glass trick. (a) True (b) False
40. 40.🔍 Which is the odd one out? (a) a fridge magnet (b) a vacuum cleaner (c) a bicycle pump (d) a drinking straw

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