Earth History

Front

What depositional environment is characterized by coarse, poorly sorted, and angular grains?

Back

River

Front

What depositional environment is characterized by fine, well sorted, and subrounded grains?

Back

Ocean

Front

Which era is known as 'The Age of Reptiles'?

Back

Mesozoic

Front

Which era is known as 'The Age of Mammals'?

Back

Cenozoic

Front

In which era did the first humans appear?

Back

Cenozoic

Front

What is the geological time scale?

Back

A system of chronological dating that relates geological strata to time.

Tags

NGSS.MS-ESS1-4

Front

Define sedimentary rock.

Back

Rock formed by the accumulation and compaction of mineral and organic particles.

Front

What is the significance of the Precambrian era?

Back

It is the longest geological time period, covering about 88% of Earth's history.

Tags

NGSS.MS-ESS1-4

Front

What are fossils?

Back

Preserved remains or traces of ancient organisms.

Tags

NGSS.MS-LS4-1

NGSS.MS-LS4-2

Front

What is the principle of superposition?

Back

In undisturbed sedimentary rock layers, the oldest layers are at the bottom and the youngest are at the top.

Tags

NGSS.MS-ESS1-4