Give an activity, which proves that air exerts pressure
Answers
Answer:
Air pressure or atmospheric pressure is the weight of air acting on a unit are of surface.Air exerts pressure in all directions. Apparatus Required:Glass tumbler, water and card board. Procedure : Fill the glass tumbler completely with water
Explanation:
Materials needed:
Experiment I
Bionic Finger
1. One heavy rubber plunger (to unplug a sink).
2. A stool or chair with a smooth seat.
Strategy:
Experiment I
Bionic Finger
1. Make a small hole in the plunger with a scissor's point.
2. Show the students the plunger and ask: "What is under the plunger
when I place it on the table?" (anticipated answer: 'nothing').
3. Ask one of the students to come up and put his/her cheek close to the
hole in the plunger.
4. Push the plunger in: air rushes out and blows against the cheek!
Air occupies space!
5. Show the students the plunger on top of a stool.
6. Tell them that you possess a bionic finger and that you can hold
down the plunger against the stool with one finger.
7. Push down on the plunger and hold it down with one finger covering
the hole (a wet finger will work better), and ask a student to come
up and pull the plunger up.
The whole stool will stick to the plunger and be lifted!
Performance Assessment:
Experiment I
Have students collect items that operate on this principle: suction cup
darts, soap dishes, coat hooks, portable pencil sharpeners, dashboard cups, etc.
Have students make comments or write poems about how they use "Air pressure in
their lives."
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