8.11C Review

Which process is responsible for carrying fertilizers that have been applied to crops into bodies of water, such as a river?

• Runoff
• Evaporation
• Ocean Currents
• Tectonic Plate movement

Who causes the most damage to coral reefs?

• Whales
• Fish
• Boats
• Humans

a man made, underwater structure that promotes the growth of reef dwelling aquatic organisms.

• Corral reefs
• Artificial reefs
• organisms
• food

taking more fish out of an ecosystem than can be replaced by the reproductive rates of the remaining populations.

• extint
• fishing
• over fishing
• over population

Humans often change ecosystems as a result of population growth, consumption, and technology. Which of the following exemplifies a way in which humans modify ecosystems? 

• factory and automotive emissions causing acid rain 
• redirecting and storing freshwater behind dams 
• cutting down trees to build new buildings and roads 
• all of these

A manatee is a water-dwelling herbivore on the list of endangered species. If manatees were to become extinct, what would be the most likely result in areas where they had lived?

• Certain producer organisms would become more abundant in the area.
• Other manatees would move into the area and restore balance.
• Predators in the area would have more food to eat.
• The area would not be affected.

Scientists are concerned about overfishing of shark populations. Sharks feed on rays and rays feed on scallops. Without sharks, rays consume all the scallop beds. This situation demonstrates that: 

• humans can improve an ecosystem by removing predators.
• humans can upset an ecosystem by removing species.
• reducing the shark population increases the quantity of scallops that can be taken.
• sharks are not important for the stability of the ecosystem.

A change in temperature can affect an environment.

• True
• False

Currently sharks are on a rapid decline due to overfishing. If sharks go extinct will this affect the biodiversity of the ocean?

• No, sharks are not important.
• No, sharks will only affect the seal populations.
• Yes, it will disrupt the entire food chain in the ocean.
• Yes, but only a little.

The graph shows total commercial catch, or landings, of a type of cod. The data in the graph cover more than a hundred years, from 1893 to 2005.

The graph shows a particular PATTERN in the data from 1990 to 2000. Which of the following time periods has the MOST similar pattern to that decade?

• 1895-1905

• 1925-1935

• 1945-1955

• 1975-1985