Front

What is the principle of superposition?

Back

In a sequence of undisturbed sedimentary rocks, the oldest layers are at the bottom and the youngest layers are at the top.

Tags

NGSS.MS-ESS1-4

Front

Define intrusion in geology.

Back

An intrusion is a body of igneous rock that forms when magma cools and solidifies within pre-existing rock layers.

Tags

NGSS.MS-ESS2-1

Front

What is an unconformity?

Back

An unconformity is a surface that represents a gap in the geological record, indicating that sediment was not deposited for a period of time.

Tags

NGSS.MS-ESS1-4

Front

What does a fault represent in geological terms?

Back

A fault is a fracture or zone of fractures between two blocks of rock, allowing for movement and displacement.

Tags

NGSS.MS-ESS1-4

Front

Explain what erosion surface means.

Back

An erosion surface is a surface that has been worn away by the action of wind, water, or ice, often exposing underlying layers.

Tags

NGSS.MS-ESS2-2

Front

What is the significance of rock unit relationships in relative dating?

Back

Rock unit relationships help determine the chronological order of geological events and the relative ages of rock layers.

Tags

NGSS.MS-ESS1-4

Front

How can you identify the youngest rock layer in a sequence?

Back

The youngest rock layer is typically found at the top of the sequence, following the principle of superposition.

Tags

NGSS.MS-ESS1-4

Front

What is a fold in geology?

Back

A fold is a bend in rock layers that occurs due to tectonic forces, often resulting in complex structures.

Tags

NGSS.MS-ESS2-3

Front

Define the term 'geological time scale'.

Back

The geological time scale is a system of chronological dating that relates geological strata to time, dividing Earth's history into eons, eras, periods, and epochs.

Tags

NGSS.MS-ESS1-4

Front

What is the difference between relative dating and absolute dating?

Back

Relative dating determines the sequence of events without providing specific ages, while absolute dating provides a numerical age for rocks or fossils.