Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 288 · 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 what we measure. (a) True (b) False
2. 2.True or false: a magnet is needed for the card-on-a-glass trick. (a) False (b) True
3. 3.True or false: a compass needle works by air pressure. (a) False (b) True
4. 4.⚖️ 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) the way we turn it (c) how full the glass is
5. 5.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to cool the glass (c) to make it rain (d) to catch any spills
6. 6.🧺 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) a mirror
7. 7.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
8. 8.🥤 Why does juice go up a drinking straw when you sip? (a) air pushes it up (b) juice likes plastic (c) the straw is magnetic (d) the straw is hot
9. 9.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a balloon (c) a sink or a bucket (d) a stiff postcard
10. 10.🔍 Which is the odd one out? (a) a magnetic chess set (b) a compass needle (c) a fridge magnet (d) a suction hook
11. 11.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a fridge magnet (c) a bicycle pump (d) a suction hook
12. 12.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is heavier (c) it will not break (d) it is hotter
13. 13.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
14. 14.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) True (b) False
15. 15.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
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 same card”? (a) we measure it (b) we change it (c) we keep it the same
17. 17.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a sink or a bucket (c) yeast (d) a balloon
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 towel (c) a stiff postcard (d) yeast
19. 19.⚖️ 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 the one thing we change. (a) False (b) True
20. 20.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) over a sink or bucket (c) on a bed (d) over a laptop
21. 21.⚖️ 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 kept the same. (a) False (b) True
22. 22.True or false: a drinking straw works by air pressure. (a) False (b) True
23. 23.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
24. 24.🥛 Why is it best to fill the glass right to the top? (a) little air left inside (b) water is heavier (c) the card gets wet (d) it looks nicer
25. 25.🔍 Which is the odd one out? (a) a suction hook (b) a drinking straw (c) a medicine dropper (d) a magnetic chess set
26. 26.⚖️ 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) how full the glass is (c) the way we turn it (d) the same card
27. 27.⚖️ 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) True (b) False
28. 28.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
29. 29.⚖️ 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
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 what we measure. (a) False (b) True
31. 31.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) air (c) water (d) smoke
32. 32.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a magnet (c) a towel (d) a stiff postcard
33. 33.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
34. 34.🧺 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) a magnet (d) a towel
35. 35.🥛 Which of these works by air pressure? (a) a drinking straw (b) a fridge magnet (c) a magnetic pin holder (d) a magnetic chess set
36. 36.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
37. 37.True or false: a sink or a bucket is 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 card is kept the same. (a) True (b) False
39. 39.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
40. 40.⚖️ 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

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