Science study guide

Question 1

The cambrian explosion was the-

Answer 1

appearance of many different life forms on Earth

Question 2

_______ might have affected mammal evolution in Australia

Answer 2

land bridges

Question 3

Glacial grooves are evidence of

Answer 3

ice scraping on land

Question 4

The geologic time scale was developed using

Answer 4

changes in fossils

Question 5

________ was NOT a significant geologic event of the mesozoic era

Answer 5

widespread glaciation

Question 6

The cenozoic era is called the age of mammals because-

Answer 6

they were successful during this era

Question 6

Coal beds of the paleozoic era formed in ______ climates -

Answer 6

wet, warm, tropical

Question 6

The dominant life-forms of the mesozoic era were-

Answer 6

reptiles

Question 7

________ covered much of earth during the early paleozoic era -

Answer 7

inland seas

Question 8

The pleistocene ice age was a major event of the _____ era-

Answer 8

Cenozoic

Question 9

_______ occur when numerous species die out

Answer 9

mass extinction

Question 10

A _____ does NOT cause geographic isolation -

Answer 10

small stream