Earth's Layers and Plate Tectonics
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Questions and Answers

What is the point deep in the Earth’s crust where an earthquake begins called?

focus

What is the name for magma that reaches the surface of the Earth?

lava

What type of mountains are formed along plate boundaries when two plates collide?

fold mountains

What is the name of the underwater mountain range formed where two plates separate?

<p>Mid-ocean ridge</p> Signup and view all the answers

What measures and determines the strength of earthquakes?

<p>Richter Scale</p> Signup and view all the answers

Name one advantage of volcanoes mentioned in the text.

<p>Fertile soil</p> Signup and view all the answers

What causes the plates to move slowly on top of the mantle?

<p>Friction between the convectional currents and the plates</p> Signup and view all the answers

What is the very hot core that heats the magma called?

<p>Inner core</p> Signup and view all the answers

What type of plates are formed where two plates separate?

<p>Constructive plates</p> Signup and view all the answers

What type of plates are formed by two colliding plates?

<p>Destructive plates</p> Signup and view all the answers

Flashcards

Focus of an earthquake

The point deep within the Earth's crust where an earthquake originates.

Lava

Molten rock that has erupted onto the Earth's surface.

Fold Mountains

Mountains formed when two tectonic plates collide and push against each other.

Mid-Ocean Ridge

An underwater mountain range formed where two tectonic plates are pulling apart.

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Richter Scale

A scale used to measure the intensity of earthquakes.

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Volcanic Soil

A benefit of volcanic activity, providing fertile soil for agriculture.

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Convectional Currents

The force that drives the movement of tectonic plates on the Earth's mantle.

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Inner Core

The solid, very hot core of the Earth that heats magma.

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Constructive Plates

Plates that move apart from each other, creating new crust.

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Destructive Plates

Plates that collide with each other, causing subduction and mountain building.

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