The Relative Age of Rocks

The number of years that have passed since he rock formed is the rock’s

• A relative age

• B law of superposition

• C absolute age

• D index fossil

The age of a rock compared to the ages of other rocks is the rock’s

• absolute age

• geologic age

• sedimentary age

• relative age

A formation of igneous rock on Earth’s surface is known as

• a gap

• an intrusion

• a fault

• an extrusion

A break in Earth’s crust is called

• an intrusion

• a fault

• a layer

• an index fossil

5. Geologists use the law of ____________________ to determine the relative ages of sedimentary rock layers.

• superposition

• gravity

• uniformitarianism

• original horizontality

A mass of igneous rock below the Earth’s surface is called a(n) ____________________.

• igneous rock

• sedimentary rock

• metamorphic rock

• plutonic rock

Because of ____________________, most of the geologic record of sedimentary rock layers has been lost.

• missing information

• erosion

• volcanic activity

• tectonic shifts

A gap in the geologic record is known as a(n) ____________________.

• unconformity

• conformity

• stratification

• deposition

According to the law of ____________________, in horizontal sedimentary rock layers the oldest layer is at the bottom and the youngest layer is at the top.

• superposition

• gravity

• uniformitarianism

• original horizontality

The definition of 'aberration' is:

• a deviation from the norm

• a type of fruit

• a mathematical equation

• a musical instrument