Geologic Time

Geologic Time

Assessment

Flashcard

Science

7th Grade

Hard

Created by

Wayground Content

FREE Resource

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15 questions

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1.

FLASHCARD QUESTION

Front

What is Geologic Time?

Back

Geologic Time is the timeline of Earth's history, divided into different intervals based on significant geological and biological events.

2.

FLASHCARD QUESTION

Front

What are the main divisions of Geologic Time?

Back

The main divisions are Eons, Eras, Periods, and Epochs.

3.

FLASHCARD QUESTION

Front

What does the Law of Superposition state?

Back

In an undisturbed 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 a fossil?

Back

A fossil is the preserved remains or traces of ancient organisms.

5.

FLASHCARD QUESTION

Front

Why is the fossil record considered incomplete?

Back

The fossil record is incomplete because many organisms never became fossils, fossils can be eroded away, and scavengers and decomposers can destroy them.

6.

FLASHCARD QUESTION

Front

What era do mammals dominate?

Back

Mammals are dominant in the Cenozoic Era.

7.

FLASHCARD QUESTION

Front

When did humans first appear in the geologic timeline?

Back

Humans appeared relatively recently in the geologic timeline.

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