Geology Semester 1 Review - 2020

Front

What geologic feature/event would you most likely find at a divergent boundary between two pieces of oceanic crust?

Back

Mid-Ocean Ridge

Front

What occurs at a divergent boundary?

Back

Plates pull apart.

Front

Why is coal not classified as a mineral?

Back

It is not inorganic.

Front

What type of volcano is characterized by broad, gentle slopes and primarily erupts basaltic lava?

Back

Shield volcano.

Front

Which type of magma contains the least amount of SiO2?

Back

Basaltic.

Front

What is a rift valley?

Back

A lowland region formed by the divergence of tectonic plates.

Front

Define a composite volcano.

Back

A volcano formed from alternating layers of lava flow, ash, and other volcanic debris.

Front

What is the primary composition of basaltic magma?

Back

Low silica content and high iron and magnesium.

Front

What is the difference between intrusive and extrusive igneous rocks?

Back

Intrusive rocks form from magma that cools slowly beneath the Earth's surface, while extrusive rocks form from lava that cools quickly on the surface.

Front

What is subduction?

Back

The process where one tectonic plate moves under another and sinks into the mantle.