Earth as a System
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Earth as a System
What is Earth Science?
What are the Earth System’s four Spheres?
What are cycles and how do they work?Slide2
System: A kind of model often used to describe the natural world.Closed System: ENERGY enters and may leave, but MATTER does not leaveOpen System: ENERGY and MATTER are free to enter and leave
Is the Earth an Open or Closed System?Slide3
Earth is considered closed, there are a few exceptions: hydrogen escapes & meterorites enter.Slide4
VolcanoEnergy is released, matter released as lavaLight bulbElectrical Energy enters, light is releasedTreeSunlight, water, & Carbon Dioxide in, water and oxygen released, seeds and leaves drop to groundOceanSunlight enters, water enters through runoff and precipitation, water leaves through evaporationBoiling WaterHeat enters, heat and vapors are released
OPEN or CLOSED?Slide5
PopulationResourcesImpactScience helps educate us and find solutions!!!
Humans and the planet EarthSlide6Slide7
Atmosphere: gaseous envelope surrounding the Earth. Provides Oxygen & Carbon Dioxide, also absorbs and blocks harmful radiation. Where all weather occurs.Geosphere: all physical features of the Earth (except water) such as rocks, mineral resources, metals, mountains, beaches, and lithospheric plates.Hydrosphere: Includes all of Earth’s water including oceans, rivers, lakes, and groundwater, it is continually recycled. 97% salt water, 3% fresh water, 1% usable.Biosphere: All living thingsDiscuss interactions among the Spheres
The Earth System’s four SpheresSlide8
Identify the 4 SpheresSlide9Slide10
Carbon in our EarthSlide12
The movement of Energy into and out of the Earth SystemA.K.A. The Energy BudgetBalance is the Key: equal energy in and out
The Energy CycleSlide13
of total energy
It comes from nuclear reactions in the sun
, ocean currents, waves, and
Geo means EarthThermal means Heat0.013% Drives the movement of Earth’s crust, Volcanoes, Earthquakes, and GeysersImportant role in the Rock Cycle
0.002% of the energy budgetResults from the moon’s pull on the Earth’s oceansPowerful enough to slow down the Earth