Inside the Earth Why is geology important Layers
- Slides: 19
Inside the Earth
Why is geology important?
Layers of the Earth • If we could take a chunk out of the Earth, we would see that it is made up of different layers.
Layers of the Earth • Earth is made up of 3 main layers – Crust – Mantle – Core – Each layer has it’s own individual composition and physical properties.
Physical Properties and Composition • Composition= what it’s made of • Physical properties= characteristic that is unique and helps to identify the substance (temp, size, shape, color) • Example: Chocolate Chip Cookies • Composition- flour, eggs, sugar, chocolate chips, baking powder, butter • Properties- round, rough, sweet, tan and black, hot, lumpy,
Layers of the Earth(p 90) • CRUST – Physical Properties: • outermost layer • thinnest layer (5 -70 km thick) • Surface temperature • 1% of Earth’s mass • where we live • touches the atmosphere – Composition: • consists of loose rocks & soil
Crust • Very thin
2 Types of Crust • Continental Crust: dry land, granite less dense Oceanic Crust: ocean floor, Basalt, thinner than cont. crust but more dense
Layers of the Earth • MANTLE – Physical Properties: • thickest layer (2900 km thick) • 1600 -4000 F • 66% of earth’s mass • flowing – Composition: • Molten rock – Magma
Layers of the Earth • CORE – Physical properties: • HOT! 4000 -8000 F • Very dense • High pressure • 4000 miles from surface • 33% of Earth’s mass • About the same size as Mars – Composition: • Iron and Nickel (metals)
What have you noticed about temperature and pressure? • As you get deeper inside the Earth, temperature Increases • As you get deeper inside the Earth, pressure Increases
Layers of the Earth • The 3 main layers of the Earth can be divided further by the way they “act” within the Earth and by their different physical properties.
Lithosphere Crust and upper Mantle • outermost layer – includes crust and upper mantle • rigid • divided into pieces or tectonic plates • Rocks and soil
Asthenosphere Middle Mantle • composed of solid flowing rock • layer on which pieces of lithosphere move on top (solid rock that flows) – Think of it like caramel
Mesosphere Bottom Mantle • strong, lower part of the mantle • layer between asthenosphere and core
The Core Outer and Inner • The core is divided into two parts – Outer Core: • Liquid iron and nickel that’s spinning – Inner Core: • Solid iron and nickel • Solid because of all the pressure of the rest of the Earth surrounding it.
How do we know? • Seismic waves produced by earthquakes travel at different speeds through solid rock and liquids
Layers of the Earth
- Dense ball of solid metal
- Why is the inside of the earth hot
- Hey bye bye
- Geology earth science definition
- Geology earth science definition
- Earth science vs geology
- Earth science branches
- Whats inside the earth
- Chapter 7 section 1 inside the earth answer key
- Three compositional layers of the earth
- Produced from the heat inside the earth
- Inside planet earth video worksheet answers
- Forces inside earth
- Forces
- The layers of the earth from innermost to outermost
- Composition of the earth's crust
- What are the five physical layers of the earth?
- Layers of the earth vocabulary
- Physical layers of the earth
- What is the thickest layer of the earth?