Chapter 7 Lesson 1

Question 0

Eras

Answer 0

Eons that are subdivided into smaller units of time

Question 1

Eon

Answer 1

The longest units of geologic time

Question 2

Period

Answer 2

Eras are subdivided

Question 3

Epoch

Answer 3

Periods are subdivided

Question 4

Mass Extinction

Answer 4

Extinction of many species on Earth within a short period of time

Question 5

Land Bridge

Answer 5

This connects two continents that were previously separated

Question 6

Geographic Isolation

Answer 6

The separation of a population of organisms front the rest of its species due to some physical barrier, such as a mountain range or ocean

Question 7

Paleozoic Era

Answer 7

The oldest era of the Phanerozoic eon

Question 8

Mesozoic Era

Answer 8

The middle of the era of the Phanerozoic eon

Question 9

Cenozoic Era

Answer 9

The youngest era of the Phanerozoic era

Question 10

Inland Sea

Answer 10

The body of water formed when ocean water floods continents

Question 11

Coal Swamp

Answer 11

An oxygen-poor environment where, over time, ant material changes into coal

Question 12

Supercontinent

Answer 12

The ancient land mass which separated into present-day continents

Question 13

Dinosaur

Answer 13

Dominant Mesozoic land vertebrates that walked with legs directly positioned below their hips

Question 14

Plesiosaurs

Answer 14

Mesozoic marine reptiles with small heads, long necks, and flippers