A.   They are 30% of the world’s freshwater and 20% of America’s drinking water.

B.   They are 20% of the world’s freshwater and 10% of America’s drinking water.

C.   They are 20% of the world’s freshwater and 80% of America’s drinking water.

D.   They are 10% of the world’s freshwater and 50% of America’s drinking water.

A.   South of the equator in temperate conditions—we know this from the cold water clams studied.

B.   North of the equator in tropical conditions—we know this from the warm water clams studied.

C.   South of the equator in tropical conditions—we know this from the coral reefs studied.

D.   South of the North Pole—we know this from polar bear tracks.

A.   Mud that mixes with shells

B.   Deposition of shells

C.   Magma cooling

D.   Recrystallization

A.   Much harder

B.   Much softer

C.   Slightly softer

D.   Slightly harder

A.   James Hutton

B.   Charles Lyell

C.   Clyde Simmons

D.   Alfred Wallace

E.   Charles Darwin

A.   He believed the falls were receding at 2 ft/year

B.   He believed the falls were receding at 1 ft/ a year

C.   He believed the falls were receding at 5 ft/year

D.   He believed the falls were receding at 10 ft/year

A.   1 ft/ year (making them actually 35,000 years old).

B.   3 ft/ year (making them actually 12,000 years old).

C.   2 ft/ year (making them actually 24,000 years old).

D.   5 ft/ year (making them actually 5,000 years old).

A.   Each drumlin faces the opposite direction, revealing that many giant forces formed them all most likely many glaciers

B.   Each drumlin faces the same direction, revealing that the same giant force formed them all most likely the glaciers

C.   The drumlins that a volcanic eruption blasted the surface causing conditions to cool and resulting the glaciers forming

A.   20 ice sheets

B.   10 ice sheets

C.   1 ice sheet

D.   5 ice sheets

E.   3 ice sheets

A.   Basalt is an igneous rock—meaning that it formed from magma. This means that the Great Lakes formed due to volcanoes.

B.   Basalt is a glacier deposit showing that the Great Lakes formed due to glaciers.

C.   Basalt is an igneous rock that can only be created with intense volcanic activity, therefore it was discovered that a large rift formed here in the past causing the great depth of Lake Superior.

A.   The excess water in the Great Lakes retreated through an ancient river system and to the sea.

B.   The excess water in the Great Lakes retreated through an underground tunnel to the Mississippi River.

C.   It refroze into smaller glaciers in Minnesota.

A.   180 feet

B.   1000 feet

C.   3600 feet

D.   1800 feet

E.   18 feet

A.   The land surface rises an inch each year.

B.   The land surface rises 3 inches each year.

C.   The land surface rises 10 inches each year.

D.   The land surface rises a foot each year.

E.   The land surface rises 5 feet each year.

A.   Niagara Falls will migrate to Lake Ontario and cause Lake Erie to rise as Lake Ontario flows into it.

B.   Niagara Falls will erode back to Lake Erie and the other lakes will rise by over 180 ft.

C.   Niagara Falls will erode back into Lake Erie, causing the levels of the lakes to drastically fall.

D.   Niagara Falls will migrate to Lake Huron and cause Lake Erie and Huron to become one giant lake.