Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 719 · 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.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a battery cell (c) a towel (d) a stiff postcard
2. 2.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
3. 3.True or false: a sink or a bucket is needed for the card-on-a-glass trick. (a) False (b) True
4. 4.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) sand (c) air (d) smoke
5. 5.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a compass needle (c) a fridge magnet (d) a vacuum cleaner
6. 6.True or false: a compass needle works by air pressure. (a) True (b) False
7. 7.🥛 Which of these works by magnetism? (a) a suction hook (b) a magnetic pin holder (c) a medicine dropper (d) a vacuum cleaner
8. 8.⚖️ 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
9. 9.True or false: a glass of water is needed for the card-on-a-glass trick. (a) False (b) True
10. 10.🔍 Which is the odd one out? (a) a bicycle pump (b) a magnetic pin holder (c) a drinking straw (d) a vacuum cleaner
11. 11.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a drinking straw (c) a compass needle (d) a magnetic pin holder
12. 12.🔍 Which is the odd one out? (a) a suction hook (b) a medicine dropper (c) a drinking straw (d) a magnetic chess set
13. 13.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
14. 14.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
15. 15.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the water turns to ice (b) the card flies away (c) the card stays on (d) the glass breaks
16. 16.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) magnetism (b) air pressure
17. 17.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
18. 18.🥛 Does a compass needle work by air pressure or by magnetism? (a) magnetism (b) air pressure
19. 19.True or false: a balloon is not needed for the card-on-a-glass trick. (a) False (b) True
20. 20.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
21. 21.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a balloon (c) a sink or a bucket (d) a battery cell
22. 22.⚖️ 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 glass
23. 23.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to grow plants (c) to cool the glass (d) to catch any spills
24. 24.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a mirror (b) a towel (c) a stiff postcard (d) a glass of water
25. 25.True or false: yeast is needed for the card-on-a-glass trick. (a) False (b) True
26. 26.⚖️ 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) how full the glass is (b) whether the card stays (c) the same glass (d) the same card
27. 27.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is heavier (c) it is magnetic (d) it is hotter
28. 28.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is what we measure. (a) True (b) False
29. 29.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a stiff postcard (c) a balloon (d) a mirror
30. 30.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a stiff postcard (c) a glass of water (d) a battery cell
31. 31.True or false: a medicine dropper works by air pressure. (a) True (b) False
32. 32.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) over a sink or bucket (c) near a plug point (d) on a bed
33. 33.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
34. 34.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
35. 35.⚖️ 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 what we measure. (a) False (b) True
36. 36.⚖️ 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
37. 37.⚖️ 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 measure it (c) we change it
38. 38.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a magnet (b) a glass of water (c) a sink or a bucket (d) a stiff postcard
39. 39.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a suction hook (c) a bicycle pump (d) a fridge magnet
40. 40.True or false: yeast is not needed for the card-on-a-glass trick. (a) True (b) False

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