Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 609 · 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.🥛 Why is it best to fill the glass right to the top? (a) little air left inside (b) it looks nicer (c) water is heavier (d) the card gets wet
2. 2.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is the one thing we change. (a) True (b) False
3. 3.🧺 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 towel (d) a magnet
4. 4.🔍 Which is the odd one out? (a) a suction hook (b) a magnetic pin holder (c) a vacuum cleaner (d) a bicycle pump
5. 5.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
6. 6.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to catch any spills (c) to cool the glass (d) to make it rain
7. 7.🔍 Which is the odd one out? (a) a drinking straw (b) a medicine dropper (c) a bicycle pump (d) a compass needle
8. 8.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a compass needle (c) a suction hook (d) a magnetic pin holder
9. 9.🛟 Where should you do the card-and-glass trick? (a) over a sink or bucket (b) near a plug point (c) on a bed (d) over a laptop
10. 10.True or false: a compass needle works by air pressure. (a) False (b) True
11. 11.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a mirror (b) a stiff postcard (c) a glass of water (d) a towel
12. 12.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) air pressure (b) magnetism
13. 13.True or false: a balloon is needed for the card-on-a-glass trick. (a) True (b) False
14. 14.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
15. 15.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) smoke (c) sand (d) air
16. 16.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a bicycle pump (c) a medicine dropper (d) a magnetic chess set
17. 17.🥤 Why does juice go up a drinking straw when you sip? (a) juice likes plastic (b) the straw is hot (c) the straw is magnetic (d) air pushes it up
18. 18.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
19. 19.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
20. 20.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a medicine dropper (c) a compass needle (d) a magnetic pin holder
21. 21.🔍 Which is the odd one out? (a) a drinking straw (b) a fridge magnet (c) a magnetic chess set (d) a compass needle
22. 22.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) yeast (b) a glass of water (c) a towel (d) a sink or a bucket
23. 23.⚖️ 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
24. 24.🥛 What holds the card up against the upside-down glass? (a) a magnet (b) air pushing up (c) the cold water (d) glue on the card
25. 25.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
26. 26.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a compass needle (c) a drinking straw (d) a magnetic chess set
27. 27.⚖️ 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 glass
28. 28.🧺 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 balloon (c) a glass of water (d) a stiff postcard
29. 29.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
30. 30.🔍 Which is the odd one out? (a) a drinking straw (b) a fridge magnet (c) a vacuum cleaner (d) a medicine dropper
31. 31.📘 Air presses on everything around us. What is this push called? (a) sunlight (b) magnetism (c) air pressure (d) friction
32. 32.⚖️ 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
33. 33.⚖️ 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) False (b) True
34. 34.⚖️ 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
35. 35.⚖️ 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) the same glass (b) the way we turn it (c) how full the glass is (d) whether the card stays
36. 36.True or false: a bicycle pump works by air pressure. (a) False (b) True
37. 37.⚖️ 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
38. 38.⚖️ 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
39. 39.⚖️ 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
40. 40.True or false: a towel is not needed for the card-on-a-glass trick. (a) True (b) False

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