Mastering 6
Many pollutants from coal-fired power plants are properly managed today. Which of the following is currently considered to be the biggest threat to the environment?
Carbon dioxide
Inner core
Composed mostly of solid metal
Outer Core
Composed of molten metal
The earthquakes that occur in Southern California generally occur above a
Fault
Old Faithful Geyser at Yellowstone National Park in the United States acquires its energy from a
Hot spot
found in the Atlantic Ocean between North America and Europe is composed of dense and relatively young rock.
Seafloor crust
Layered _______________________ exposed by erosion can be seen when looking at the Grand Canyon in the United States.
Sedimentary Rock
All fossil fuels, including coal, are considered an indirect form of ____________ energy.
Solar
The extremely deep ocean Marianas Trench is a result of
Subduction
What color smoke coming from a coal-fired power plant would indicate wasted fuel?
black
Upper Mantle
contains the asthenosphere just below the crust
Australia is composed of relatively old and thick
continental crust
Where is electricity made at a coal-fired power plant?
generator
During peak usage, what happens to the cost of electricity?
it almost always increases
The slowly increasing distance between South America and Africa is due to
seafloor spreading
Lower Mantle
thick layer of dense rock surrounding the core.
Crust
thin rock layer at Earth's surface