How is the population distributed in South America? a. it is distributed mainly along the coastal areas of the continent.
b. it is fairly evenly distributed throughout the continent.
c. it is mostly confined to the northern half of the continent.
d. it is clustered in the interior of the continent.

Which of the layers of the earth has the following three characteristics? i. it is a solid outer layer. ii. it is between 3 and 30 miles thick. iii. it is separated into plates. a. the outer core b. the inner core c. the mantle d. the crust

Look at the diagram showing the different wavelengths in sunlight. which statement describes electromagnetic waves with wavelengths greater than 700 nanometers? they take the form of heat. they can cause skin cancer and sunburn. they are some of the shortest waves. they can be seen by human eyes as visible light.

In plate tectonics, why is the north american plate tectonically inactive?