Air Pressure Experiment Worksheet

Science experiments lesson 6: Air pressure: the card on a glass · Set 106 · 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.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a balloon (c) a sink or a bucket (d) a glass of water
2. 2.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a stiff postcard (c) a mirror (d) a towel
3. 3.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic chess set (c) a suction hook (d) a fridge magnet
4. 4.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) water is heavier (c) it looks nicer (d) little air left inside
5. 5.True or false: a balloon is needed for the card-on-a-glass trick. (a) False (b) True
6. 6.True or false: yeast is needed for the card-on-a-glass trick. (a) True (b) False
7. 7.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) air inside pushes back (c) the bottle is magnetic (d) water is hiding there
8. 8.True or false: a bicycle pump works by magnetism. (a) True (b) False
9. 9.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
10. 10.True or false: a drinking straw works by air pressure. (a) False (b) True
11. 11.🧺 Do we need yeast for the card-on-a-glass trick? (a) not needed (b) needed
12. 12.True or false: a medicine dropper works by magnetism. (a) False (b) True
13. 13.⚖️ 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
14. 14.True or false: a suction hook works by magnetism. (a) False (b) True
15. 15.🥛 Which of these works by magnetism? (a) a drinking straw (b) a vacuum cleaner (c) a medicine dropper (d) a fridge magnet
16. 16.True or false: a mirror is needed for the card-on-a-glass trick. (a) False (b) True
17. 17.🔮 Predict: you blow up a balloon. What fills it? (a) sand (b) water (c) smoke (d) air
18. 18.⚖️ 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 measure it (b) we change it (c) we keep it the same
19. 19.🥛 Which of these works by air pressure? (a) a compass needle (b) a magnetic chess set (c) a fridge magnet (d) a suction hook
20. 20.🥛 Which of these works by magnetism? (a) a magnetic pin holder (b) a suction hook (c) a vacuum cleaner (d) a drinking straw
21. 21.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to catch any spills (c) to grow plants (d) to make it rain
22. 22.⚖️ 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) True (b) False
23. 23.🥛 Does a drinking straw work by air pressure or by magnetism? (a) magnetism (b) air pressure
24. 24.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
25. 25.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) turmeric powder (c) yeast (d) a towel
26. 26.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a stiff postcard (c) turmeric powder (d) a towel
27. 27.🔍 Which is the odd one out? (a) a bicycle pump (b) a magnetic pin holder (c) a magnetic chess set (d) a fridge magnet
28. 28.🧺 Which of these is needed for the card-on-a-glass trick? (a) a mirror (b) a stiff postcard (c) yeast (d) a magnet
29. 29.🔍 Which is the odd one out? (a) a magnetic chess set (b) a fridge magnet (c) a magnetic pin holder (d) a medicine dropper
30. 30.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) not needed (b) needed
31. 31.⚖️ 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) how full the glass is (b) the same glass (c) the way we turn it (d) the same card
32. 32.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a glass of water (c) yeast (d) a towel
33. 33.⚖️ 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) False (b) True
34. 34.⚖️ 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 measure it (c) we change it
35. 35.True or false: a magnetic chess set works by magnetism. (a) False (b) True
36. 36.🧺 Do we need a glass of water for the card-on-a-glass trick? (a) not needed (b) needed
37. 37.True or false: a glass of water is needed for the card-on-a-glass trick. (a) True (b) False
38. 38.🔍 Which is the odd one out? (a) a bicycle pump (b) a medicine dropper (c) a suction hook (d) a magnetic pin holder
39. 39.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
40. 40.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) glue on the card (c) air pushing up (d) a magnet

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids