Which of the following is a characteristic of fine-grained clastic rocks?

A) most clasts are visible with the unaided eye
B) the rocks are poorly sorted
C) the cobbles directly rest on one another without much matrix
D) the rocks tend to be easily eroded

What best explains the term greenhouse effect? 

A)  The greenhouse effect refers to the occupational diseases of florists. 
B)  The greenhouse effect refers to the trapping of heat energy in the troposphere by certain gaseous molecules. 
C)  The greenhouse effect refers to the efforts by the White House to support environmental legislation. 
D)  The greenhouse effect refers to the trapping of heat energy in the stratosphere by nitrogen.

Which strategy should be given the lowest priority in a low-waste approach? 

A)  recycle the waste 
B)  reuse the waste 
C)  reduce the waste 
D)  bury the waste

Which of the following is a major class of insecticides? 

A)  carbamates 
B)  bromated hydrocarbons 
C)  organicals 
D)  biocontrols