Geologic Time Scale

Geologic Time Scale

Assessment

Flashcard

Science

7th Grade

Practice Problem

Medium

Created by

Wayground Content

Used 1+ times

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15 questions

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1.

FLASHCARD QUESTION

Front

What is the Geologic Time Scale?

Back

A system of chronological dating that relates geological strata to time, used by geologists and other Earth scientists to describe the timing and relationships of events in Earth's history.

2.

FLASHCARD QUESTION

Front

What is relative age dating?

Back

A method used to determine the age of rocks and fossils in relation to one another, without determining their exact age.

3.

FLASHCARD QUESTION

Front

What does the Law of Superposition state?

Back

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

4.

FLASHCARD QUESTION

Front

What is an index fossil?

Back

A fossil that is used to define and identify a particular time period in the geologic time scale, typically widespread and existed for a short duration.

5.

FLASHCARD QUESTION

Front

Why is fossil 3 not a good index fossil?

Back

It is found in multiple layers of the same outcrop, which makes it difficult to determine a specific time period.

6.

FLASHCARD QUESTION

Front

Approximately how long ago did Earth form?

Back

About 4.6 billion years ago (4.6 bya).

7.

FLASHCARD QUESTION

Front

What is the significance of the Law of Superposition in geology?

Back

It helps geologists determine the relative ages of rock layers and the fossils within them.

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