Earth In Cross Section.

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Presentation transcript:

Earth In Cross Section

Introduction Vocabulary Varying: changing or changeable Cross Section: “Cut in Half” view Composition: What a substance is made of Inferred: Not directly observed TEKS: Social Studies – 6.22 (A), Using social studies terminology correctly 7.22 (A), 8.31 (A)

Earth in Cross Section Lithosphere: 0 to 200 Km. Composed of 2 layers Crust: Thin solid shell of rock on surface Rigid Mantle: Solid part of the mantle Crust composed of 2 different rock types… Continental granite rock (low density) Oceanic basalt rock (higher density) Oceanic basalt sinks lower in the mantle due to its higher density TEKS: Social Studies – 6.22 (A), Using social studies terminology correctly 7.22 (A), 8.31 (A)

Part 1: Earth in Cross Section Asthenosphere: 200 to 600Km Plastic (not solid) part of mantle Denser than crust Made of melted rock (magma) Mantle: 600 to 2800 Km Thickest interior layer of Earth Stiff (solid) part of the mantle Denser than layers above it TEKS: Social Studies – 6.22 (A), Using social studies terminology correctly 7.22 (A), 8.31 (A)

Part 1: Earth in Cross Section Outer Core: 2800 to 5200 Km Liquid (melted) iron and nickel Denser than mantle Inner Core: 5200 to 6400 Km Deepest, most dense layer Solid iron and nickel TEKS: Social Studies – 6.22 (A), Using social studies terminology correctly 7.22 (A), 8.31 (A)

Part 1: Earth in Cross Section The “MOHO” is an interface or boundary Between the crust and the rigid mantle We live on Earth’s surface..the crust TEKS: Social Studies – 6.22 (A), Using social studies terminology correctly 7.22 (A), 8.31 (A)

Part 2: Earth in Cross Section Read the graphs and other information on the p.10 “Inferred Properties of Earth’s Interior” chart and be able to describe the following relationships… As depth increases, density increases Pressure and temperature are both directly related to depth! TEKS: Social Studies – 6.22 (A), Using social studies terminology correctly 7.22 (A), 8.31 (A)

Part 2: Layers of the Atmosphere Atmosphere: “envelope” of gases surrounding earth Earth’s surface is “0” ft altitude= sea level When you fly in a plane or climb a mountain, you increase altitude TEKS: Social Studies – 6.22 (A), Using social studies terminology correctly 7.22 (A), 8.31 (A)

Part 2: Layers of the Atmosphere Troposphere: 0 to 12 Km above sea level Contains most of the air in the whole atmosphere The layer we live in The layer where all the weather occurs As altitude increases, temperature and pressure both decrease. TEKS: Social Studies – 6.22 (A), Using social studies terminology correctly 7.22 (A), 8.31 (A)

Part 2: Layers of the Atmosphere Stratosphere: 12 to 50 Km above sea level Has a LOT less air than the troposphere, so pressure decreases As altitude increases, temperature increases Mesosphere: 50-80 Km above sea level Even less air than stratosphere As altitude increases, temperature decreases TEKS: Social Studies – 6.22 (A), Using social studies terminology correctly 7.22 (A), 8.31 (A)

Part 2: Layers of the Atmosphere Thermosphere: >80 Km above sea level Upper layer of atmosphere As altitude increases, temperature increases! Highest layer of atmosphere: above the thermosphere is space! TEKS: Social Studies – 6.22 (A), Using social studies terminology correctly 7.22 (A), 8.31 (A)

Part 3: Composition Crust: The outer solid rock shell of earth Read the chart on p1 ESRT to fill in blanks All elements are found in minerals of rocks Atmosphere: envelope of gases surrounding earth Hydrosphere: Water found in low areas of crust TEKS: Social Studies – 6.22 (A), Using social studies terminology correctly 7.22 (A), 8.31 (A)

Layers of the Atmosphere TEKS: Social Studies – 6.22 (A), Using social studies terminology correctly 7.22 (A), 8.31 (A)