Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 507 · 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.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) smoke (c) sand (d) air
2. 2.🥛 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
3. 3.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a drinking straw (c) a bicycle pump (d) a fridge magnet
4. 4.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to grow plants (c) to make it rain (d) to catch any spills
5. 5.🔍 Which is the odd one out? (a) a compass needle (b) a fridge magnet (c) a magnetic chess set (d) a drinking straw
6. 6.📘 Air presses on everything around us. What is this push called? (a) friction (b) air pressure (c) magnetism (d) sunlight
7. 7.🧺 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 mirror (d) a stiff postcard
8. 8.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a glass of water (c) a battery cell (d) a stiff postcard
9. 9.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) yeast (c) a magnet (d) a sink or a bucket
10. 10.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
11. 11.True or false: a drinking straw works by magnetism. (a) False (b) True
12. 12.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
13. 13.⚖️ 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
14. 14.⚖️ 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) the same glass (c) whether the card stays
15. 15.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) little air left inside (c) water is heavier (d) it looks nicer
16. 16.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
17. 17.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) on a bed (c) over a sink or bucket (d) near a plug point
18. 18.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a fridge magnet (c) a compass needle (d) a bicycle pump
19. 19.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a magnet (c) a glass of water (d) turmeric powder
20. 20.🥤 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
21. 21.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) True (b) False
22. 22.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
23. 23.True or false: a balloon is not needed for the card-on-a-glass trick. (a) False (b) True
24. 24.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) magnetism (b) air pressure
25. 25.True or false: a drinking straw works by air pressure. (a) False (b) True
26. 26.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card flies away (b) the glass breaks (c) the water turns to ice (d) the card stays on
27. 27.True or false: a magnet is not needed for the card-on-a-glass trick. (a) False (b) True
28. 28.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is heavier (c) it is magnetic (d) it will not break
29. 29.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
30. 30.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a magnetic chess set (c) a fridge magnet (d) a vacuum cleaner
31. 31.⚖️ 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) True (b) False
32. 32.True or false: yeast is not needed for the card-on-a-glass trick. (a) True (b) False
33. 33.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a battery cell (c) a stiff postcard (d) a glass of water
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 towel (c) a stiff postcard (d) yeast
35. 35.🧺 Which of these is needed for the card-on-a-glass trick? (a) a stiff postcard (b) turmeric powder (c) a battery cell (d) a balloon
36. 36.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) True (b) False
37. 37.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a stiff postcard (b) a magnet (c) a glass of water (d) a sink or a bucket
38. 38.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
39. 39.True or false: a magnetic chess set works by air pressure. (a) True (b) False
40. 40.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed

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