Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 918 · 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? 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
2. 2.🔍 Which is the odd one out? (a) a fridge magnet (b) a suction hook (c) a magnetic chess set (d) a magnetic pin holder
3. 3.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same glass”? (a) we keep it the same (b) we change it (c) we measure it
4. 4.⚖️ 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 change it (b) we measure it (c) we keep it the same
5. 5.True or false: yeast is not needed for the card-on-a-glass trick. (a) False (b) True
6. 6.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) air pushes it up (c) the straw is magnetic (d) juice likes plastic
7. 7.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
8. 8.⚖️ 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
9. 9.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
10. 10.🔍 Which is the odd one out? (a) a medicine dropper (b) a magnetic chess set (c) a fridge magnet (d) a compass needle
11. 11.🔍 Which is the odd one out? (a) a bicycle pump (b) a fridge magnet (c) a compass needle (d) a magnetic pin holder
12. 12.⚖️ 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) False (b) True
13. 13.⚖️ 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
14. 14.🧺 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 glass of water (c) a stiff postcard (d) a mirror
15. 15.🔮 Why do we try the card trick over a sink or a bucket? (a) to catch any spills (b) to grow plants (c) to make it rain (d) to cool the glass
16. 16.True or false: a towel is not needed for the card-on-a-glass trick. (a) True (b) False
17. 17.True or false: a drinking straw works by air pressure. (a) True (b) False
18. 18.🧺 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) a glass of water (d) turmeric powder
19. 19.⚖️ 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) the way we turn it (b) whether the card stays (c) how full the glass is
20. 20.📘 Air presses on everything around us. What is this push called? (a) friction (b) magnetism (c) sunlight (d) air pressure
21. 21.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) True (b) False
22. 22.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) a magnet (c) the cold water (d) air pushing up
23. 23.🧺 Which of these is needed for the card-on-a-glass trick? (a) yeast (b) a magnet (c) a stiff postcard (d) a balloon
24. 24.True or false: a magnetic pin holder works by air pressure. (a) False (b) True
25. 25.⚖️ 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
26. 26.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) water (c) air (d) smoke
27. 27.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a magnet (c) a glass of water (d) a sink or a bucket
28. 28.🧺 Do we need a magnet for the card-on-a-glass trick? (a) not needed (b) needed
29. 29.🔍 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 water turns to ice (c) the glass breaks (d) the card stays on
30. 30.True or false: yeast is needed for the card-on-a-glass trick. (a) True (b) False
31. 31.⚖️ 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
32. 32.True or false: a vacuum cleaner works by magnetism. (a) False (b) True
33. 33.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a glass of water (c) a towel (d) a battery cell
34. 34.🥛 Which of these works by air pressure? (a) a drinking straw (b) a fridge magnet (c) a compass needle (d) a magnetic chess set
35. 35.⚖️ 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
36. 36.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) needed (b) not needed
37. 37.True or false: a fridge magnet works by air pressure. (a) True (b) False
38. 38.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a glass of water (c) a battery cell (d) a magnet
39. 39.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
40. 40.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) the cap is sticky (c) water is hiding there (d) the bottle is magnetic

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