Which of the following rocks cannot be metamorphosed?

A) shale
B) sandstone
C) limestone
D) granite
E) all of these can be metamorphosed

Geologists can investigate the interior of the Earth by:

A) examining rocks that once resided at great depths
B) subjecting rocks to high temperature and pressure in laboratory settings
C) creating computer and numerical models to model processes that occur at depth
D) all of these are ways geologists can investigate the interior of the Earth

Which organism spreads malaria? 

A)  flies 
B)  worms 
C)  mosquitoes 
D)  snails

Early hunter-gatherers had a greater environmental impact than more advanced hunter-gatherers.

Which letter in the diagram corresponds to a substance that is formed from the photolysis of nitrogen dioxide but can also result from stratospheric penetrations?

Which of the following is true about a feature that develops in desert landscapes?

A) an alluvial fan forms where a river terrace steepens toward the channel
B) a desert wash typically has some water throughout the year
C) a playa is a gently sloping erosion surface
D) desert pavement takes thousands of years to develop
E) none of these