Introduction
Learning Objectives
After reading, studying, and discussing the Introduction, you should be able to:
Introduction Outline
A. Hydrosphere
1. Ocean the most prominent feature of the hydrosphere
a. Nearly 71 % of Earths surface
b. About 97 % of Earths water
2. Also includes fresh water
B. Atmosphere
C. Biosphere
1. Includes all life
2. Influences other three spheres
D. Lithosphere
1. Earths rigid outer layer
2. Solid Earth consists of
a. Core
b. Mantle
c. Crust
3. Lithosphere includes
a. Crust
b. Part of upper mantle
4. Divisions of Earths surface
a. Continents
b. Ocean Basins
II. Earth science
A. Encompasses all sciences that seek to understand
1. Earth
2. Earths neighbors in space
B. Includes
1. Geology
a. Physical geology examines the materials composing Earth
b. Historical geology is the study of the origin and development of Earth
C. Oceanography
a. Not a separate and distinct science
b. Oceanography integrates
- Chemistry
- Physics
- Geology
- Biology
3. Meteorology
4. Astronomy
III. Resources and environmental issues
1. Surrounds and influences organisms
2. Influences on organisms
- Biological
- Social
- Nonliving ( physical environment )
- Water
- Air
- Soil
- Rock
B. Resources
1. Important environmental concerns
2. Include
- Water
- Soil
- Minerals
- Energy
3. Two broad categories
a. Renewable
1. Can be replenished
2. Examples
a. Plants
b. Wind energy
b. Nonrenewable
1. Fixed quantities
2. Examples
- Metals
- Fuels
C. Environmental problems
- Urban air pollution
- Acid rain
- Ozone depletion
- Global warming
3. Natural hazards
- Earthquakes
- Landslides
- Floods
- Hurricannes
4. World population pressures
IV. Scientific inquiry
B. Goal of science
C. An idea can become a
D. Scientific method
- Hypotheses
- Theories
- Laws
E. Scientific knowledge is gained through
- Collecting facts
- Developing a hypothesis
- Conduct experiments
- Reexamine the hypothesis
- Accept
- Modify
- Reject
2. Theories that withstand examination
3. Totally unexpected occurrences