Physical Science
Classwork: Understanding Graphs

Graphs are used to show visual representations of data. By graphing data we can notice trends we may not see otherwise. Graphs can be used to draw conclusions. Additionally one of the most powerful functions of graphs is our ability to make predictions for the future from graphs. Below are several different types of graphs showing all sorts of information. Your task is to:
Determine the independent and dependent variables
Explain in a complete sentence what the data shows
Make a prediction for what may happen in the future, being specific when possible


Independent variable:
Dependent variable(s):
Does the graph show a trend? If so describe it:
What do the dashed lines mean?
What is your prediction for the future levels of CO2 and for global temperatures?






Independent variable:
Dependent variable(s):
Does the graph show a trend? If so describe it:
At point 3 what is occurring on the Hare line? Hypothesize what is happening in the real world.

At point 4 what is occurring on the Lynx line? Hypothesize what is happening in the real world.

Future prediction:








Independent variable:
Dependent variable(s):
This graph shows at least two trends; describe one of them:
Describe a second trend:
Future prediction:
Why do YOU think there is a slight dip around the early 2000s?
Create a good, descriptive title for each graph. Write the titles in order in the space below.