Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 139 · 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.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) True (b) False
2. 2.🥛 Which of these works by air pressure? (a) a medicine dropper (b) a magnetic chess set (c) a fridge magnet (d) a magnetic pin holder
3. 3.⚖️ 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) the same card (c) the way we turn it (d) how full the glass is
4. 4.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
5. 5.True or false: a vacuum cleaner works by air pressure. (a) False (b) True
6. 6.True or false: a medicine dropper works by magnetism. (a) True (b) False
7. 7.⚖️ 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 measure it (c) we change it
8. 8.True or false: a drinking straw works by magnetism. (a) True (b) False
9. 9.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
10. 10.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a sink or a bucket (c) a magnet (d) a glass of water
11. 11.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) turmeric powder (b) a towel (c) a sink or a bucket (d) a glass of water
12. 12.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a fridge magnet (c) a magnetic pin holder (d) a magnetic chess set
13. 13.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a compass needle (c) a magnetic pin holder (d) a suction hook
14. 14.🔍 Which is the odd one out? (a) a medicine dropper (b) a vacuum cleaner (c) a magnetic pin holder (d) a bicycle pump
15. 15.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a compass needle (c) a magnetic pin holder (d) a drinking straw
16. 16.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
17. 17.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a balloon (b) a glass of water (c) a stiff postcard (d) a sink or a bucket
18. 18.True or false: a medicine dropper works by air pressure. (a) False (b) True
19. 19.🛟 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 magnetic (d) it is hotter
20. 20.⚖️ 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
21. 21.🔍 Which is the odd one out? (a) a suction hook (b) a drinking straw (c) a medicine dropper (d) a magnetic chess set
22. 22.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
23. 23.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a suction hook (c) a compass needle (d) a magnetic chess set
24. 24.🥛 Why is it best to fill the glass right to the top? (a) it looks nicer (b) the card gets wet (c) water is heavier (d) little air left inside
25. 25.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) False (b) True
26. 26.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) the straw is magnetic (c) air pushes it up (d) juice likes plastic
27. 27.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a mirror (c) turmeric powder (d) a towel
28. 28.⚖️ 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) how full the glass is (b) whether the card stays (c) the same card
29. 29.⚖️ 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
30. 30.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
31. 31.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a sink or a bucket (c) a stiff postcard (d) a magnet
32. 32.🥛 What holds the card up against the upside-down glass? (a) air pushing up (b) the cold water (c) glue on the card (d) a magnet
33. 33.🔍 Which is the odd one out? (a) a fridge magnet (b) a compass needle (c) a drinking straw (d) a magnetic pin holder
34. 34.🔍 Which is the odd one out? (a) a bicycle pump (b) a vacuum cleaner (c) a suction hook (d) a compass needle
35. 35.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) turmeric powder (c) a sink or a bucket (d) a towel
36. 36.True or false: a compass needle works by air pressure. (a) True (b) False
37. 37.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a stiff postcard (c) turmeric powder (d) a balloon
38. 38.True or false: a mirror is not needed for the card-on-a-glass trick. (a) True (b) False
39. 39.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a stiff postcard (c) yeast (d) a sink or a bucket
40. 40.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) air (c) water (d) sand

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