Match the following:Part A1. biodiversity 2. biome 3. estuary 4. permafrost 5. wetlands Part Ba. place where fresh and salt water meet b. transitional area between land and water systems that support aquatic life c. similar ecosystems, such as marine or desert d. number of plants and animals in an ecosystem e. frozen layer of soil below the earth's surface

Use your vocabulary words to complete the sentences below. more of the world's population is now concentrated in heavily populated urban areas known as a this is quite a contrast from the past when or native groups were either farmers or — hunters and gatherers who moved between places in search of food. advanced technology has led to the integration of world economics and cultures, in the world's more developed countries. this integration requires , the responsible use and management of natural resources.

What's erosion? a. the breakdown of rock into smaller pieces b. the removal of weathered products from rock c. a change in rock resulting from exposure to water d. a chemical change in rock that weakens it

In which area will soil formation be greatest? a a steep slope in a warm,b wet climate a flat area in a warm,c wet climate a north-facing area on a steep slope a flat area in a cold, d wet climate description