1. What is Earth Science?
How does the Earth’s processes affect our lives and do people affect our environment?

2. What is Earth Science? The study of Earth, including:
The processes and forces that change it
The materials from which it’s made
Its long history
Its place in the universe

3. The Four Branches of Earth Science
Astronomy
Meteorology
Geology
Oceanography

4. Astronomy
Study of objects beyond Earth’s atmosphere

5. Meteorology
Study of the air that surrounds Earth

6. Geology
Study of materials that make up Earth and the processes that form and change these materials

7. Oceanography
Study of Earth’s oceans and the creatures and processes within

8. The Four Systems of Earth
Earth has 4 interdependent systems
Lithosphere
Hydrosphere
Atmosphere
Biosphere

9. Lithosphere Rigid outer shell of Earth
Made up of crust and solid portion of mantle
Includes oceanic and continental crust

10. Layers of Earth’s Interior
Crust
Lithosphere (solid)
Mantle
Asthenosphere (liquid)
Mesosphere (solid)
Core
Outer Core (liquid)
Inner Core (solid)

12. Hydrosphere All the water on Earth, including: Eath is 70% water
Oceans - Rivers
Seas - Glaciers
Lakes - Atmospheric Water
Eath is 70% water
97% is saltwater, 3% is freshwater
Most freshwater is in glaciers

13. Atmosphere Gases that surround Earth
78% Nitrogen (N2), 21 % Oxygen (O2)
Rest is:
Water Vapor - Argon
Carbon Dioxide (CO2) - Trace gases

14. Biosphere
All organisms on Earth as well as the environments they live in