Which of the following statements about the effects of pollution on marine ecosystems is true?

a.
burning fossil fuels causes a direct increase in the temperatures of ocean water.
b.
burning fossil fuels causes a decrease in the ph of ocean water making it more acidic.
c.
pollution in marine ecosystems causes a decrease in the formation of algal blooms.
d.
addition of warm water has no effect on marine ecosystems

In order of decreasing light-transmitting capabilities of materials, which is the correct sequence? a. transparent -> translucent -> opaque b. opaque -> transparent -> translucent c. opaque -> translucent -> transparent d. translucent -> transparent -> opaque

Which scientist was the first to propose the heliocentric model of the universe? a. aristotle b. isaac newton c. galileo galilei d. nicolaus copernicus

Hydroelectricity provides about 7 percent of the electricity generated in the united states. (a) explain how a hydroelectric power plant converts energy stored in water into electricity. (b) identify two factors that determine the amount of electricity that can be generated by an individual hydroelectricity power plant. (c) describe the two main types of land-based hydroelectric power plants. (d) describe two economic advantages and two environmental disadvantages of hydroelectricity.