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An Introduction to Earth Science. Unit 1 - Chapter 1. What is Earth Science?. Definition – the study of Earth and its neighbors in space. 4 subdivisions of Earth Science. 1. Geology. Definition – study of planet Earth 2 Areas of Geology. Physical Geology
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An Introduction to Earth Science Unit 1 - Chapter 1
What is Earth Science? • Definition – the study of Earth and its neighbors in space. 4 subdivisions of Earth Science
1. Geology • Definition – study of planet Earth • 2 Areas of Geology
Physical Geology The examination of the materials that make up the Earth And the explanations for the processes that shape the Earth. Areas of Geology
Historical Geology • Understanding Earth’s long history.
2. Oceanography • The study of the Ocean’s biology, chemistry and geology.
3. Meteorology • The study of the atmosphere, weather and climate.
4. Astronomy The study of the universe.
Earth science is an ever evolving science because the Earth itself is CONSTANTLY changing! • A new section of Earth science is environmental science.
Environmental Science • How humans interact/their relationship with the natural Environment. 40th anniversary of Earth Day Video
The Earth is divided into 4 major spheres. Geosphere or
1. Hydrosphere • Consists of all the water on the Earth. • The oceans make up 97% of the water on Earth • The other 3% is freshwater. (we must MAXIMIZE its use)
Water is what makes our planet unique! • We are the ONLY planet with liquid water. • Water supports life • No water = No life
2. Atmosphere • Thin gaseous layer that surrounds the planet • 100 kilometers thick. • Provides the air we breathe • Protects us from the Sun’s heat and radiation • Provides our weather and climate
3. Geosphere • Divided into 4 main parts • 1. The Crust • 2. The Mantle • 3. The Outer Core • 4. The Inner Core
1. Lithosphere Rigid outer layer of the Earth – cool & solid Crust & uppermost part of mantle. 2. Asthenosphere Plasticity – warm & liquid Lower mantle Geosphere Cont.
4. Biosphere • Includes all life on Earth. • Extends from the ocean floor to about a mile into the air
Other Spheres5. Cryosphere • The Earth's surface where water is in a solid form
6. The Anthroposphere • Humans and our constructions (also called anthrosphere).
Interactions between the Spheres • All of the spheres interact and influence the others • The hydrosphere, geosphere and atmosphere ALL affect life • Life affects and changes the hydrosphere, geosphere and atmosphere
All the Spheres interact with Each other. • Get into your assigned groups. • Place all spheres together in a square formation. (they should slightly overlap) • Cut out the different items or interactions and place them in the appropriate sphere or spheres. • EARTH IS A SYSTEM!!!