Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 755 · 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? True or false: how full the glass is is kept the same. (a) True (b) False
2. 2.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it will not break (c) it is hotter (d) it is heavier
3. 3.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to grow plants (c) to catch any spills (d) to cool the glass
4. 4.🧺 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 glass of water (d) turmeric powder
5. 5.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
6. 6.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) magnetism (b) air pressure
7. 7.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
8. 8.🔍 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 stays on (c) the glass breaks (d) the card flies away
9. 9.🥛 Which of these works by magnetism? (a) a suction hook (b) a bicycle pump (c) a medicine dropper (d) a fridge magnet
10. 10.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
11. 11.🧺 Which of these is needed for the card-on-a-glass trick? (a) a battery cell (b) turmeric powder (c) a balloon (d) a towel
12. 12.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) air pressure (b) magnetism
13. 13.🧺 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 glass of water (d) a towel
14. 14.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a suction hook (c) a magnetic chess set (d) a fridge magnet
15. 15.🧺 Which of these is needed for the card-on-a-glass trick? (a) a sink or a bucket (b) yeast (c) a mirror (d) turmeric powder
16. 16.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) air pushing up (c) the cold water (d) a magnet
17. 17.🥛 Which of these works by air pressure? (a) a vacuum cleaner (b) a magnetic chess set (c) a compass needle (d) a fridge magnet
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) a mirror (c) a stiff postcard (d) a glass of water
19. 19.📘 Air presses on everything around us. What is this push called? (a) air pressure (b) magnetism (c) friction (d) sunlight
20. 20.⚖️ 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 the one thing we change. (a) False (b) True
21. 21.🔍 Which is the odd one out? (a) a compass needle (b) a medicine dropper (c) a bicycle pump (d) a vacuum cleaner
22. 22.True or false: a bicycle pump works by magnetism. (a) False (b) True
23. 23.⚖️ 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 measure it (b) we keep it the same (c) we change it
24. 24.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
25. 25.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) sand (c) water (d) smoke
26. 26.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
27. 27.True or false: turmeric powder is not needed for the card-on-a-glass trick. (a) False (b) True
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) whether the card stays (b) how full the glass is (c) the way we turn it
29. 29.⚖️ 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 card
30. 30.⚖️ 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
31. 31.True or false: a bicycle pump works by air pressure. (a) True (b) False
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) the same glass (b) whether the card stays (c) how full the glass is (d) the way we turn it
33. 33.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
34. 34.True or false: a drinking straw works by air pressure. (a) False (b) True
35. 35.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a stiff postcard (c) yeast (d) a towel
36. 36.True or false: a battery cell is needed for the card-on-a-glass trick. (a) True (b) False
37. 37.True or false: a magnet is not needed for the card-on-a-glass trick. (a) False (b) True
38. 38.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is kept the same. (a) True (b) False
39. 39.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) True (b) False
40. 40.⚖️ 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

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