Chapter 3 & 5 Flashcardizz

Front

What mineral is considered hazardous due to its potential carcinogenic properties?

Back

Asbestos

Front

What is an index fossil?

Back

A fossil that is widespread, short-lived, and easily recognizable.

Front

What scale ranks mineral hardness from 1 (softest) to 10 (hardest)?

Back

Mohs' scale

Front

What is the smallest subdivision of geologic time?

Back

Epoch

Front

What are the divisions of geologic time smaller than eras but larger than epochs called?

Back

Periods

Front

What is the definition of a mineral?

Back

A naturally occurring, inorganic solid with a definite chemical composition and crystalline structure.

Front

What is the significance of index fossils in geology?

Back

Index fossils help to date and correlate the age of rock layers.

Front

What are the three main types of rocks?

Back

Igneous, sedimentary, and metamorphic.

Front

What is the process of forming sedimentary rocks called?

Back

Lithification.

Front

What is the difference between an era and a period in geologic time?

Back

An era is a larger division of geologic time than a period.