Section 2-3 Teaching Outline

Book K

Anticipatory Set

Discover: What does a graph of temperature and pressure show?

Items used: Rulers

Graph paper

pencil

Procedure: See page 56 k SE

Assignment: See page 56K SE

Assign Reading

Go over "Guide for Reading" p. 56K

Objectives: The student will be able to…

Activating Prior Knowledge:

Show an example of last weeks weather and temperatures chart, ask student s what the temperature did for the week ? (at a glance). (see temp chart from channel 12)

Presentation

"what is a graph in your own words?"

  1. Graphs show how variables such a temperature, volume and pressure are related to each other.
  2. Graphs can be used to make predictions. EX: On your graph what will happen to the pressure if the temp goes up 5 more degrees?

In this section you will learn how to interpret graphs on the properties of gases.

Example Experiment:

See figure 17. What is going on in this picture? Volume of a cylinder is allowed to change as temperature is changed.

The temperature is slowly changed from 0’ c to 100’ c in 10’ c increments

Horizontal axis: the line at the bottom

Vertical axis: the line up and down at the side.

Horizontal usually has the manipulated variable. The one that you can change such as temperature.

Vertical usually has the responding variable . The variable that reacts to your changes

(see pg 58K figure 19 for the results of the graphing.)

Notice each point on the graph has two readings the temperature and the volume of the gas.

Also notice the graph moves upward from the left to the right.

"What is this graph showing?" that according to Charles’s law if the temperature of a gas is increased the volume will increase. Directly Proportional or a direct relationship

Example 2:

"What is occurring in the next figure figure 20? Pressure is increased on a volume of gas.

"What is the manipulated variable?, where should it go on the graph?

"What is the responding variable? Where should it go?

"what is the result" as pressure increases volume decreases. An inverse relationship

Discuss History of Science p. 58K TE on Jacque Charles

Check Your Progress:

Skills Lab: See page 50 K SE of your book.

Materials: Syringe with at least 35cm capacity

Modeling Clay

4 Books of the same weight

Procedure: See book

Activity at Home:

Assignment: Do worksheets Review and Reinforce 2-3, and Enrich, TE 51, 52K