1. Change
Types of Graphs

2. Change
Change occurs when the properties or characteristics of a part of the environment have been altered.
Humans can cause rapid and large scale change.
Cyclic Changes: changes that repeat in time and space
Prediction – a type of inference about the conditions and behavior of the environment in the future.
Cyclic changes can be predicted.
Not all change is cyclic
Examples: seasons, tides, lunar phases
An example of noncyclic change is the occurrence of
Earthquakes
Ocean tides
The phases of the moon
The seasons of the year

3. Cyclic Graphs Predictable variables that repeat Examples:
Seasons, lunar phases, tides
Predator prey relationships

4. Rate of Change
Rate of Change: how much a measurable aspect of the environment is altered (changed) over a given time.
This can be calculate – the equation is on page 1 of the ESRT.
Example:
In 1958 a mountain is 3000ft high. In 1998 the same mountain is 2920ft high. Calculate the rate of change. Round to the nearest whole number.
Rate of Change = Change in value/Time

5. Direct Relationship Graphs
When one variable increases, the other variable increases.
Examples:
mass and volume
More you study and higher test grades

6. Indirect Relationship Graphs
When one variable increases the other decreases
Examples:
Temperature and pressure
Temperature and density

7. Graphing What things must all graphs have? A title Appropriate Scale
Labels on each axis with necessary units
Practice!