Earth Science Cumulative Review

Front

What is the principle of superposition in geology?

Back

In geology, the principle of superposition states that in any undisturbed sequence of rocks, the oldest layers are at the bottom and the youngest layers are at the top.

Front

Define condensation in the water cycle.

Back

Condensation is the process by which water vapor in the atmosphere cools and changes into liquid water, forming clouds.

Front

What is half-life in radioactive decay?

Back

Half-life is the time required for half of the radioactive atoms in a sample to decay into a stable form.

Front

Identify the region in Virginia where most gravel and sand deposits are found.

Back

Most gravel and sand deposits in Virginia are found in the Coastal Plain region.

Front

What does the presence of a fossil in a rock layer indicate about its age?

Back

The presence of a fossil in a rock layer indicates that the rock layer is younger than the fossil but older than the layers above it.

Front

What is the process of evaporation?

Back

Evaporation is the process by which liquid water is transformed into water vapor, usually due to heat.

Front

Explain the term 'intrusion' in geology.

Back

An intrusion is a body of igneous rock that forms when magma cools and solidifies beneath the Earth's surface.

Front

What is the significance of the Coastal Plain region in Virginia's geology?

Back

The Coastal Plain region is significant for its extensive deposits of gravel and sand, which are important for understanding sedimentary processes.

Front

How do scientists determine the age of rocks using half-lives?

Back

Scientists determine the age of rocks by measuring the amount of radioactive isotopes present and calculating how many half-lives have passed.

Front

What is precipitation in the water cycle?

Back

Precipitation is any form of water, such as rain, snow, sleet, or hail, that falls from the atmosphere to the Earth's surface.