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Unit 3 Earth's Biological History Test

Unit 3 Earth's Biological History Test

Assessment

Flashcard

Science

8th Grade

Practice Problem

Hard

Created by

Wayground Content

FREE Resource

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15 questions

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1.

FLASHCARD QUESTION

Front

What are the subdivisions of periods in the geologic time scale?

Back

Epochs are the subdivisions of periods.

2.

FLASHCARD QUESTION

Front

What percentage of species that have ever lived are currently alive?

Back

1% of the species that have ever lived are alive today.

3.

FLASHCARD QUESTION

Front

What is a fossil that is preserved intact, including fur, hair, bones, and flesh called?

Back

An unaltered fossil.

4.

FLASHCARD QUESTION

Front

What is the term for the change in species over time as organisms adapt to their environments?

Back

Evolution.

5.

FLASHCARD QUESTION

Front

What did Earth's first atmosphere consist of?

Back

Hydrogen and Helium.

6.

FLASHCARD QUESTION

Front

What is the longest division of geologic time?

Back

Eons are the longest divisions of geologic time.

7.

FLASHCARD QUESTION

Front

What is the process by which species become extinct at a rapid rate?

Back

Mass extinction.

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