EQUATIONS OF SCIENCE
Lesson 3

Objective:  Students collect and plot data using various types of graphing techniques.

Materials:
         worksheet

Teacher Notes:

Go over the information in the reader, emphasizing the importance of graphs.  Make sure students understand pie, bar, and line graphs.  This reader should be a review, but if not, go into each of the graphs in more detail.

Define the axis of a graph.  Point out the vertical (y axis) and horizontal (x axis) components.  In graphing, the x is considered the independent variable, whereas the y is the dependant variable (y is dependant on x).   We will discuss more  detail on the Cartesian coordinates in the next lesson.

If students are having trouble we recommend the following site where they can make their own graphs.

http://nces.ed.gov/nceskids/createagraph/

ANSWER:

1.  a.  bar graph; b. lbs of grain per acres in 10 year time frame; c.  no, the legend for what each bar is missing

2.  it has a legend, it uses one bar to compare two types of schools

3.  a.  1.55 + 19.17 + 4.14 + + .2 + 74.94 = 100%   b. weather; c. equipment

4a.  months, price, 2004;  b. $2.041  June;  c. $1.592, January