Earth Science Skills Practice

Front

What are lines that run vertically and tell you how far east or west you are?

Back

Longitude

Front

What letter would you find at the coordinates 30°S, 30°E?

Back

E

Front

What is half-life in radioactivity?

Back

The amount of time it takes for half of a radioactive sample to decay.

Front

What term is given to unstable radioactive atoms?

Back

Parent

Front

How does intrusion X compare to the ages of the other rock layers and fossils in a geologic column?

Back

Intrusion X is younger than the broadleaf and fern fossils.

Front

What are lines that run horizontally and tell you how far north or south you are?

Back

Latitude

Front

What is the equator?

Back

An imaginary line that divides the Earth into the Northern and Southern Hemispheres.

Front

What is a geologic column?

Back

A representation of the layers of rock and fossils in a specific area.

Front

What is the difference between parent and daughter isotopes?

Back

Parent isotopes are unstable and decay into stable daughter isotopes.

Front

What does it mean for a rock layer to be 'intrusive'?

Back

It means the rock layer formed from magma that cooled and solidified beneath the Earth's surface.