How is electricity generated from hydroelectric dams or ocean tides?

A) water is pumped upward and then back down
B) turbines are used to pump the water upward and generators produce the electricity
C) water piles up behind a dam or tidal barrier and flows down because of gravity
D) all of these

Changes in topography, water chemistry, and gas output all are used to help predict:

A) volcanic eruptinons
B) mudflows
C) landslides
D) harmonic tremors

When a population exceeds the environment's carrying capacity,species diversity becomes constant.

Which term includes the others? 

A)  biological diversity 
B)  ecological diversity 
C)  functional diversity 
D)  genetic diversity

____________________ is the philosophy that people can develop principles of right and wrong by using logic to analyze ideas and arguments.

Statutory laws are those developed and passed by legislative bodies such as federal and provincial governments.