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Introduction to Earth Science

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on 23 August 2013

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Transcript of Introduction to Earth Science

Introduction to Earth Science

Drives internal processes
Sources:
Leftover heat from Earth’s formation
Radioactive decay in Earth’s interior endlessly produces heat

Earth’s Interior

The Sun

The Sun

Energy the earth uses for process come from:
Sun
Earth’s Interior

Earth’s Energy

Biosphere
(Biosphere egg created by NASA—
completely self-sustaining)

Geosphere/Lithosphere

Atmosphere

Mixture of surrounding gases
Protects biosphere
(UV rays)
Provides Air
Interacts with space and Earth’s surface to
produce weather

Atmosphere

Covers most of earth (71% of earth surface)
Mostly oceans (97% of hydrosphere)
Remaining 3% is freshwater bodies
Lakes, streams, rivers, groundwater,
glaciers, etc.
Hydrosphere is in a constant cycle
Waterbodies ↔ air ↔ land ↔waterbodies ↔…
Evaporation, rain, runoff

Hydrosphere

Four major spheres
Hydrosphere
All water on earth
Atmosphere
All gases surrounding the earth
Lithosphere/Geosphere (largest of 4 spheres)
Solid Earth: Extends from the surface to the
center of the planet (a depth of 6400 km).
Biosphere
All life forms on the Earth



Physical Structure

Earth’s Interior

Drives external processes in the atomosphere,
geosphere/lithosphere and hydrosphere
weather, climate, ocean circulation,
erosional processes


The Sun

Ever-changing
4 spheres are in constant interaction
Earth is the sum total of all interactions
If one part or aspect is altered or changed,
it affects the rest

Earth System

All living organisms from other 3 spheres
Depends on various earth processes for life and
functioning
Integral part of cycles, processes and physical
make-up/environment of the Earth


Biosphere

Geosphere and Atmosphere

3 main layers
Crust
Oceanic (Thinnest) and Continental (Thickest)
Mantle
Upper (asthenosphere) and lower
Core
Outer and Inner

Geosphere/Lithosphere

Hydrosphere

Earth

Earth Science is the study of the earth and its environment:
Physical Structure
Different processes it goes through
Dynamic and constantly changing
History

Overview

Earth’s process involve a continual interplay
between the 4 spheres

Physical Structure (con’t)

Full transcript