1. Warm-up
Describe Nebular Theory in words that a 1st grader could understand.
Earth has distinct layers because the _______ materials sank to the center.

2. “A View of Earth”
Chapter 1, Section 2

3. Earth’s “Spheres” Hydrosphere Atmosphere Geosphere Biosphere Sphere?
3-dimensional circle, region
Hydrosphere
Atmosphere
Geosphere
Biosphere

4. Hydrosphere
Water part of Earth

5. Atmosphere
Gases
Envelope of air

6. Geosphere Crust Mantle Core Different parts, not “uniform”
Under oceans and Continents

7. LAYERS!... …Why?

8. Biosphere
Life.
Places where there is life.
Includes other “spheres”

9. Earth is “Dynamic” Dynamic = changing Constructive Forces
Mountain building
Volcanism
Build up, Create.
Deconstructive Forces
“Weathering”
“Erosion”
Take-away, Flatten.

10. Theory of Plate Tectonics
Earth’s surface = parts that move independently.
“Plates.”
Always moving.
Explains how continents have moved over time.

11. Earth’s Plates

12. 7 Plates

13. Accuracy vs. Precision.
Write your own definitions…
Precise.
Accurate.

15. Accurate or Precise?
Precise!

16. Assignment: Sphere Poster (10pts)
Create a poster illustrating and Explaining Earth’s 4 spheres.
Include:
4 Color Drawings (4 pts)
4 Captions (4 pts)
Effort. (2pts)

17. Reflection
What are two things you have learned (any class) that you found surprising?
What are you PROUD of? (“Nothing” is not an acceptable answer)
What is your grade in this class?
Explain three reasons why you are getting this grade?
Are you happy with your grade? WHY?
What can you do to keep this grade or improve upon it?
How much credit would you get for an incomplete assignment?