Geological Time Scale

Front

In which time period are we currently living?

Back

Cenozoic Era

Front

Jellyfish are one of the oldest species on Earth. In what time period did they first appear?

Back

Precambrian Time

Front

In what time period did Pangaea, the super continent, appear?

Back

Paleozoic Era

Front

Dinosaurs, small mammals, and birds are found in this time period.

Back

Mesozoic Era

Front

Which fossil is the youngest?

Back

fossil C

Front

What is the importance of studying fossils?

Back

to provide information about how life and environmental conditions may have changed

Front

A branch of geology dealing with the arrangement of sedimentary rock layers or strata?

Back

Stratigraphy

Front

Geologists assume the newest rock layers are on top of the older ones, unless some type of disturbance occurs, in known as …

Back

Law of Superposition

Front

Determines the “relative” order of past events but not the absolute age.

Back

Relative age

Front

Uses the decay of radioactive elements to find the ___________________________ of a rock or fossil.

Back

Absolute age