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The Dynamic Earth Chapter 3
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Layers of the Earth Hydrosphere Atmosphere Geosphere
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The Geosphere Chapter 1, Section 1
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The Composition of Earth
The upper and lower crust, the mantle, and the core Core – Earth’s innermost compositional layer
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Earthquake An earthquake is the vibrations of the Earth’s crust caused by slippage along a fault The energy released by an earthquake occurs in the form of seismic waves
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Volcanoes A mountain built from magma – melted rock – that rises from the Earth’s interior to the surface Most are located around the Pacific Rim
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Which of the following does NOT both remove and add gases to the atmosphere?
Plants Animals Automobiles Volcanic Eruptions
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Wind and Water Erosion Likely to effect: mountains, beaches, soil, soft rocks Not Likely to effect: tides
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The Atmosphere Chapter 1, Section 2
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Layers of Atmosphere Troposphere – Nearest Earth’s surface
The densest atmospheric layer Where all of Earth’s weather occurs Stratosphere – O-Zone layer Mesosphere – Coldest layer of atmosphere Thermosphere – Where nitrogen and oxygen absorb solar radiation The topmost layer Ionosphere – the lower Thermosphere
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Greenhouse Gasses GREENHOUSE gases in the atmosphere, including WATER VAPOR, trap radiated heat and help maintain surface air temperature
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Surface Currents Surface currents in the ocean can influence CLIMATES OF land areas they flow past because they CARRY WARMER OR COLDER WATER GREAT DISTANCES
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Mechanisms of Energy Transfer
Radiation – The transfer of energy across space Conduction – The flow of heat from a warmer object to a colder object when the objects are placed in direct physical contact Convection – The transfer of heat by air currents
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The Hydrosphere and Biosphere
Chapter 3, Section 3
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Hydrosphere Includes all of the water on or near Earth’s surface
What about the water below Earth’s surface? There are two types of water: salt water and fresh water, in which salt water obviously contains more salt
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The Water Cycle The continuous movement of water into the air, onto land, and then back to water Evaporation – the process in which liquid water is heated by the sun and then rises into the atmosphere as water vapor Condensation – water vapor that forms droplets on dust particles Precipitation – rain, snow, sleet, or hail that falls from clouds
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Aerosols Aerosols are tiny, liquid droplets found in the atmosphere
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World Ocean A single, large, interconnected body of water that covers 70% of Earth’s surface
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Ocean Layers Surface Zone, Thermocline, and Deep Zone
The DEEP ZONE of ocean is from base of thermocline to the bottom of the ocean
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What drives the ocean surface currents?
Tectonic plates Gravity Salinity Wind
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Deepest Ocean The four main oceans are the Arctic, Indian, Atlantic, and the Pacific The deepest ocean is the Pacific Called the Challenger Deep 11,033 m below sea level
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Thermocline Boundary between warm and cold water in ocean or lake
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Where is most of the World’s fresh water?
Only ~3% of the world’s water is fresh water Most of the world’s fresh water is found in the ice caps and glaciers
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Tributaries Tributaries are smaller streams or rivers that flow into larger ones
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Recharge Zone Land surface area where water enters an aquifer
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Pack Ice Forms when frozen seawater is driven together by wind and waves
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Picture References Listed in order that they appear
state.edu/education/rr/index.php?activity=layers_of_the_ea rth volcano-blow-up-to-cover-an-entire-continent-with-ash fig5-1.htm 14
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