Plate Tectonics

Chloe Yee :D
Mind Map by Chloe Yee :D, updated more than 1 year ago
Chloe Yee :D
Created by Chloe Yee :D almost 5 years ago
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For Science :D!!!

Resource summary

Plate Tectonics
1 Section 2: Convection and the Mantle
1.1 Convection Currents in Earth
1.1.1 Heat from the core & the mantle itself causes convection currents in the mantle.
1.2 Convection Currents
1.2.1 Heating and cooling of the fluid, changes in the fluid's density, and the force of gravity combine to set convection currents in motion.
1.2.2 The flow that transfers heat within a fluid.
1.3 Types of Heat Transfers
1.3.1 Radiation
1.3.2 Conduction
1.3.3 Convection
2 Section 1: Earth's Interior
2.1 Exploring inside Earth
2.1.1 Evidence from rock samples

Annotations:

  • Scientists drill holes for samples
2.1.2 Evidence from seismic waves

Annotations:

  • Seismic waves in Earth
2.2 Journey to the Center of Earth
2.2.1 Temperature

Annotations:

  • The deeper you go, the higher.
2.2.2 Pressure

Annotations:

  • The deeper you go, the stronger the pressure.
2.3 The Mantle
2.3.1 Lower Mantle

Annotations:

  • Solid and extends down the core.
2.3.2 Lithosphere

Annotations:

  • Uppermost part of mantle.
2.3.3 Athenosphere

Annotations:

  • Soft layer of mantle, bendable.
2.4 The Crust

Annotations:

  • The layer of solid rock that forms Earth's outer skin.
2.4.1 It is between 5 to 40 km thick

Annotations:

  • Note: Under mountains, could be 70 km!
2.5 The Core

Annotations:

  • Both together are 3486 kilometers thick.
2.5.1 Outer Core

Annotations:

  • A layer of molten metal that surrounds the inner core and it is 2266 kilometers thick.
2.5.2 Inner Core

Annotations:

  • A dense ball of solid metal that is 1216 kilometers thick.
3 Section 3: Drifting Continents
3.1 Continental Drift
3.1.1 Evidence from fossils

Annotations:

  • A fossil is any trace of an ancient organism.
3.1.2 Evidence from land features

Annotations:

  • Mountains & other features on the continents provided evidence for continental.
3.1.3 Evidence from Ancient Climate Zone

Annotations:

  • Evidence from fossils/rocks can help find out what climate it was from.
3.2 Wegener's Hypothesis

Annotations:

  • Wegener's Hypothesis was that all the continents were once joined together in a single land mass and have since drifted apart.
4 Section 4: Sea-Floor Spreading
4.1 Evidence for Sea-Floor Spreading
4.1.1 Ages of rocks
4.1.2 Eruptions of molten material
4.1.3 Magnetic stripes
4.2 What is sea-floor spreading?
4.2.1 Continually adds new material to the ocean floor.
4.3 Subduction at Trenches

Annotations:

  • Tens of million years, part of the ocean floor sinks back into the mantle at deep-ocean trenches.
  • The process which the ocean floor sinks beneath a deep-ocean trench and back into the mantle is called SUBDUCTION.
5 Section 5: The theory of Plate Tectonics
5.1 How Plates Move

Annotations:

  • The theory of plate tectonics explains the formation, movements, and subduction of Earth's plates.
5.2 Plate Boundaries

Annotations:

  • There are three kinds of plate boundaries: spreading boundaries, colliding boundaries, and sliding boundaries. A different type of plate movement occurs along each type of boundary.
5.2.1 Spreading Boundaries

Annotations:

  • The place where two plates move apart is called a spreading boundary.
5.2.2 Colliding Boundaries

Annotations:

  • The place where two plates come together, or collide, is called a colliding boundary.
5.2.3 Sliding Boundaries

Annotations:

  • A sliding boundary is a place where two plates slip past each other, moving in opposite directions.
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