Chapter 10 - Rocks

A scientist who studies the classification and origin of all types of rocks is called a ________.

• mineralogist

• pedologist

• petrologist

• sedimentologist

A rock that has changed due to heat or pressure is a(n) ________ rock.

• igneous

• sedimentary

• metamorphic

• petrolithic

Rocks formed from bits and pieces of eroded rocks are called ________ rocks.

• igneous

• sedimentary

• metamorphic

• petrolithic

The individual rock particles, crystals, and sometimes fossils that combine to give a rock its texture are known as ________.

• grains

• nuggets

• sediments

• source rocks

The grain size of glassy rocks like obsidian is ________.

• very large

• medium sized

• very small

• nonexistent

According to young-earth geologists, the original igneous rocks ________.

• formed around 4 billion years ago

• were all created on Day 1 of Creation Week

• have been replaced by more recent intrusive and extrusive volcanism

• were probably granite

A rock that is often light enough to float in water is ________.

• flint

• marble

• pumice

• sandstone

Igneous rocks like granite and basalt are often used for statues and important buildings because they ________.

• are very weather resistant

• are easy to carve

• weigh little and are easy to transport

• are inexpensive

Which type of rock is most closely tied to the process of erosion?

• igneous

• metamorphic

• sedimentary

• none of these

Which of the following processes would occur between deposition and cementation in the formation of a sedimentary rock?

• compaction

• erosion

• precipitation

• petrification