The Rock Cycle

How do geologists classify rocks?

• how they were made

• how heavy they are

• how dense they are

Igneous rocks are formed when ____.

• sediments erode away

• sediments are compressed

• lava or magma cools and solidifies

Rocks can change from one type to another many times.

• True

• False

Igneous rock forms in areas where

• sediments deposit and build up

• rock is heated to melting point then cooled to a solid

• swamp animals died

The process of extreme pressure creates which type of rock?

• metamorphic rocks

• igneous rocks

• sedimentary rocks

Tags

NGSS.MS-ESS2-1

Igneous rocks are formed by ______.

• crystallization and solidification

• erosion and compaction

• heat and extreme pressure

Tags

NGSS.MS-ESS2-1

What causes the different colors of layers in a sedimentary rock?

• the cooling process of the magma

• the weather in the area

• different minerals and sediments in the rock

Igneous rocks might show that there once was ______ near by.

• oceans

• volcanoes

• swamps

The final process in the formation of sedimentary rock is ______.

• A. cementation

• B. melting

• C. cooling

What rocks are formed by extreme heat and pressure?

• metamorphic

• igneous

• sedimentary