Ch. 16.2 Human activities affect the environment.

Lesson Vocabulary: biodiversity, pollution

Review

1. renewable: air, water, wood, crops

nonrenewable: oil, coal, minerals, metals

2. Wind can carry acid rain; chemical pollutants run off land into groundwater

3. number and variety of life forms in an ecosystem

4. Sample: Natural resources can be pollutants when they end up where they don´t beong. Example: when erosion washes soil into streams; carbon from forest fire pollutes the air.

5. Sample: low biodiversity: grass field with insects, worms; high biodiversity: a forest with variety of plant and animal life

6. Acidic water slows the growth of producers in the lake. With fewer producers and less food available, the water appears clearer because there is less life in it.