The three elements most abundant in the entire Earth are:

A) sulfur, oxygen, helium
B) helium, hydrogen, oxygen
C) aluminum, potassium, sodium
D) iron, oxygen, silicon
E) hydrogen, helium, and argon

In what sphere would a geologist most likely collect rock and soil samples? 

A)  biosphere 
B)  atmosphere 
C)  lithosphere 
D)  hydrosphere

Which statement is NOT characteristic of relationships between early hunter-gatherers and the environment? 

A)  Population size was low. 
B)  They exploited their environment for food and other resources. 
C)  They caused major environmental impacts. 
D)  They used potentially renewable resources.

The Moon and Sun cause the tides in Earth's oceans because of:

A) gravity
B) heat
C) magnetic pull

What was the main tectonic setting of the western U.S. in early Paleozoic time?

A) continental collision
B) transform fault
C) passive margin
D) the interior of a supercontinent

____________________ is the development of sustainable or low-input agriculture.

One way to improve energy efficiency is to discourage independent power producers.

What is a disadvantage for populations of organisms living in water? 

A)  less exposure to UV radiation 
B)  exposure to dissolved pollutants 
C)  physical support from water buoyancy 
D)  fairly constant temperature