Earth Science

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Earth Science

• 1/21/09
• Professor Burkett

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Volcanologist

• M.S., University at Buffalo, geology
• Volcanoes in Peru and Ecuador

El Misti, Peru
Cotopaxi, Ecuador
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Paperwork

• Sign-up sheet
• Student introduction
• Syllabus
• Terms of Agreement (due Tuesday)

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College vs. High School
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What is Earth Science?
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The Four Spheres of Earth

• Geosphere
• Hydrosphere
• Atmosphere
• Biosphere

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The Four Spheres of Earth

• Geosphere
• Everything solid upon which we live
• The layered earth
• Hydrosphere
• Atmosphere
• Biosphere

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The Four Spheres of Earth

• Geosphere
• Hydrosphere
• All of Earths water, whether in the atmosphere,
  glaciers, oceans, lakes, or rivers
• Atmosphere
• Biosphere

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The Four Spheres of Earth

• Geosphere
• Hydrosphere
• Atmosphere
• Gases that form protective blanket of Earth
• Wind, regulation of climate, shielding from UV
• Mostly nitrogen (78) and oxygen (21)
• Biosphere

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The Four Spheres of Earth

• Geosphere
• Hydrosphere
• Atmosphere
• Biosphere
• Life on Earth
• Sea life, plants, flying creatures, humans
• Encompasses hydrosphere, upper geosphere, and
  lower atmosphere

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What is a system?

• System Combination of interacting components
  that form complex whole
• Systems are driven by flow of matter and energy
• Person eats food, breathes, defecates, moves
• Systems at different scales (bacteria, humans)
• Systems interact
• Human respiration affects growth of trees

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Earth The Four-Sphere System
photosynthesis
Solar radiation
Biosphere
Atmosphere
regulating climate providing CO2
chemical changes due to rock weathering
rain
water chemistry
Hydrosphere
Geosphere
rock weathering