EARTH’S VEGETATION

EARTH’S VEGETATION Plants grow nearly

everywhere on Earth but plants must adapt to their environment to survive.

In a tundra climate zone small plants and wildflowers grow

In an arid climate zone cacti can live for long periods without water.

GLOBAL VEGETATION ZONES Geographers study

where different plants grow by using vegetation zones

Each zone has a mix of plants that have adapted to the conditions of a particular area

POPULATION DENSITY

POPULATION DENSITY Tells us how crowded a place is. To calculate population density: divide the

total number of people living there by the location’s total land area

The higher the result, the more crowded Example: In 2000, New York City had a population density of more than 26,000 people per square mile. Bowling Green’s population density is 1,631 people per square mile

POPULATION DENSITY Population density affects how people

live. Example: In Bowling Green most

people use cars to get from place to place. In New York, people use subways, and ferries to get from place to place

POPULATION DENSITY