A population density map of the Middle East and North Africa shades a narrow ribbon along the Nile River as crowded, while the surrounding desert is shaded as nearly empty. What best explains that pattern?

In economics, the term scarcity describes which basic problem?

Farmers in parts of Southeast Asia cut flat steps, called terraces, into steep hillsides so rice can be grown there. This is an example of what?

Herders in the Sahel of Sub-Saharan Africa wear loose, light clothing and move their animals to new grazing land when the dry season arrives. These responses to a hot, semi-arid climate are best described as what?

A population distribution map of Russia and neighboring states shows crowded cities in the west and almost no settlement across northern Siberia. Which condition best explains the empty northern area?

An economic activity map of the Middle East and North Africa marks oil fields around the Persian Gulf. Petroleum is classified as which kind of natural resource?

The Ganges River plain in South Asia is one of the most densely settled areas on Earth. Which combination of physical conditions best explains that dense settlement?

Farmers across South Asia plant rice as the summer monsoon begins. What does the summer monsoon bring that makes this timing work?

Geographers use the term land use to describe what about a place?

The North European Plain stretches across northern Europe. Which land use is most widespread there?

In Oceania, most people live along coasts and on islands rather than in Australia's vast interior. Which factor best explains that population distribution?

A town can spend its limited budget either to repair irrigation canals or to pave a road, but not both. The value of the choice it gives up is called what?

A worker in East Asia assembles electronic parts into finished televisions inside a large factory. Which type of economic activity is that work?

A region's climate and natural resources let it produce certain goods more easily than others, so it concentrates on those goods and trades for the rest. This practice is called what?

A region with a limited supply of fresh water must choose among competing uses for it.

Why are wind and sunlight classified as renewable natural resources?

In many parts of Southeast Asia, families leave farming villages for large cities to take factory and service jobs. The resulting growth in the share of people living in cities is called what?

A long drought ruins crops in a farming area, and families move away to find work elsewhere. The drought is best described as what?

A resource map of a region marks fertile farmland inland, while a population density map of the same region shows most people settled along the coast in port cities instead. What best explains why the two maps do not match exactly?

A climate map of East Asia shades the eastern coast as wet and the far interior as dry. A population density map of East Asia shades the same eastern coast as crowded and the interior as nearly empty. What do the two maps together suggest?