Do Now: Answer the following questions in your notebook. 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.

graphs visually show information. allow for easy comparison of multiple variables. Graphs always have a title, labeled axis with units and data. * In Earth Science we will usually create line graphs.

The vertical axis is the Y axis. (usually displays dependent variable) I. Parts of a Graph The vertical axis is the Y axis. (usually displays dependent variable) The horizontal axis is the X axis. (usually displays independent variable)

Which is the dependent and independent variable? The Independent Variable is controlled by the experimenter (x-axis). It is what the scientist picks and chooses. The Dependent Variable is what is being measured in the experiment (y-axis). It is the result of what happens because of the independent variable. Which is the dependent and independent variable? The scientists measures the temperature of the water every 10 minutes Each week the student determined how much the plant grew (time = IND. ; temperature = DEP.) (time = IND. ; height of plant = DEP.)

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

When done, obtain a Graphing Review worksheet from the TOP DO NOW BIN. Most relationships in Earth Science are cyclic. Can you think of a cyclic relationship or “cycle” that occurs on Earth? Closure: When done, obtain a Graphing Review worksheet from the TOP DO NOW BIN.

Scaling and Reading a Graph AIM: How do you scale a graph?

When you create a graph, make sure to: 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 with a title and units.

The x- axis does not have to use the same scale as the y-axis. Days of the week What is this graph missing?

I. Reading a Graph - Using the data line, you can find an x-axis value and a y-axis value from one point on the line that you pick.

The answers are on E-backpack. Take a “Scaling a Graph I” worksheet from the BOTTOM DO NOW BIN. You and your partner should practice creating a graph using the given data on the worksheet. After creating the graph, work on answering the questions. For anyone that would like more practice, I have “Scaling a Graph II” from the REVIEW SHEETS BIN. (there is also a digital copy on e-backpack) The answers are on E-backpack.

II. Rate of Change (increase or decrease) measures the amount of change taking place in a given amount of time. Rate of Change = Change in Field Value Change in Time On a graph, the steepest line represents the greatest amount of change. A flat line represents no change. This equation is found on the cover of the Earth Science Reference Tables

Field value = what was being measured Change in time = the amount of time it took for the change to occur Example: The temperature in a greenhouse is 10 degrees Celsius at 12:00 a.m. At 3:00 a.m., the temperature is 5 degrees Celsius. At what rate did the temperature change? Rate of change = 1.7 0C/hr.

Closure: - Take a Rate of Change worksheet from the HOMEWORK BIN. We will work on the first problem together.