Chapter 1 Flashcards
Lava
When the magma reaches the surface of the earth it’s called lava
Magma
Semi-molten (melted) rocks
Geothermal energy
Is the thermal energy generated and stored in the earth
Tsunami
When a strong earthquake occurs under the sea and creates a giant wave
Fold mountains
They are mountains that are made when two of the earths plates collide
What are plates
Plates that make up the earths crust that are continually moving
Why do plates move
Because they are floating on molten rock of the mantle
What are convocation currents
They are in the mantle and cause the molten rock to move
Why does plate movement occur
Because of convocation currents in the earths mantle
What are the features of plate movement
Mid-ocean ridges
Volcanoes
Earthquakes
How do volcanoes occur
When two of the earths plates pull apart
How do midocean ridged occur
When 2 plates pull apart the sea the lava rises up to the ocean floor. It cools quickly into solid rock. After many eruptions it builds up to form small mountains under the water
What is a midocean ridge
A long chain of volcanic mountains under the sea
Pacific ring of fire
A zone that encircles the Pacific Ocean where most of the major volcanoes occur
What is an earthquake
A series of seismic waves or tremors in the earth’s crust
