Aim: What are graphs? Do Now: Answer the following questions in your notebook. Why is it important for scientists to organize their data? List as many.

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Presentation transcript:

Aim: What are graphs? Do Now: Answer the following questions in your notebook. Why is it important for scientists to organize their data? List as many ways as you can that scientists organize information visually.

A graph is a way in which to visually show information. Graphs allow for easy comparison of multiple variables. Graphs are constructed from data table. - include headings, units, and data. * In Earth Science we will usually create line graphs.

-The horizontal axis is the X axis. It usually displays the independent variable. - The vertical axis is the Y axis. It usually displays the dependent variable. I. Graph Parts * EVERY graph needs a title.

The Independent Variable is controlled by the experimenter (x-axis). This could be: time (dates, minutes, hours), distance (feet, meters), The Dependent Variable is directly affected by the independent variable (y-axis). It is the result of what happens because of the independent variable.

Direct relationship- as x gets bigger, y gets bigger. For example, the relation ship between age and size (until maturity) is a direct relationship. Indirect / Inverse- as x gets bigger, y gets smaller. For example, the relationship between time spent at the mall and the amount of money in your pocket is an inverse relationship. Cyclic- a repeating pattern. II. Graphing Relationships Direct Indirect / Inverse Cyclic

Most relationships in Earth Science are cyclic. Closure: When done, obtain a Graphing Review worksheet from the back top bin. Can you think of an cyclic relationships or “cycles” that occur on Earth?

Scaling Overview AIM: How do you scale a graph?

When you graph, make sure you: Have a proper title that describes the graph Plan out your scaled axis before actually writing them Label the x-axis and y-axis appropriately

One box along the x- axis is equal in length to one box along the y-axis.

The two axes can be scaled differently. Days

Rate of Change The rate of change measures the amount of change taking place in a given amount of time. This equation is found on page 1 of the Earth Science Reference Tables: Rate of Change = Change in Field Value Change in Time

Field value = what was being measured Change in time = the amount of time it took for the change to occur Rate of Change = Change in Field Value Change in Time

Example Problem Example: The temperature in a greenhouse is 10 degrees C at 12:00 a.m. At 3:00 a.m., the temperature is 5 degrees C. At what rate did the temperature change? There is a 5 degree C change in 3hrs. (5 degrees C / 3 hrs) Rate of change = 1.7 degrees C/hr.

Do now: - Take out your scaling a graph I and II. - I will be coming around to check scaling a graph II. - From your Scaling a graph I worksheet, find the rate of temperature change from January to July Rate of Change = Change in Field Value Change in Time

Rate of Change = Change in Field Value Change in Time

From your Scaling a graph II worksheet, find the rate of temperature change from July to December. Rate of Change = Change in Field Value Change in Time