1. Which option did you choose? Discuss with another student why you made the choice you made. (1 point)
Troposphere (above the surface)
Upper Crust (below the surface)
Make Sense of the Problem
3 points: 1 point for each answer
What do you know?
What do you want to find out?
What kind of answers do you expect?

2. define the variables you will use in your equation.
let one variable be a distance away from the surface and the other variable be the temperature.

The Y-intercept is the starting point at earths surface. The coordinates of the Y-intercept are(0, temperature at earths surface).

3. what is the B-value of the Y-intercept for your equation?

do you slope is the rate of change for temperature.
-if the temperature increases(gets hotter)as the distance from the surface increases then the slope is positive.
-if the temperature decreases(gets colder)as the distance from the surface increases then the slope is negative.

4. what is the slope of your equation?

5. write an equation that models the relationship between your variables.

6. identify and explain what each term represents in the temperature model.
a) the slope

b) the y-intercept

7. identify three points on your line.

8. using the coordinates from question 7, calculate the slope of your line. Does it match the slope from your model?

9. on the graph below plot the points and sketch your line.(4 points: 1 for each graphed point, 1 for the line)

10. complete the sentence for your layer.
The troposphere is the region that starts at earths surface and end betweenkm andkm above earth.
The upper crust is the region that starts at earths surface and ends between___km and___km below earths surface.

use the temperature equation to find the temperature range for your layer.

11. what is the temperature at the end of your layer that is farthest from the surface?

12. for the layer you selected, the temperature ranges from the temperature at earths surface,___,to___.