Lakes and Reservoirs Sci 6.2

A few ways to make lakes 1. Glaciers: carve depressions and make dams

2. Fault lakes: tectonic plates move apart

Lake Tanganyika and Lake Malawi in Africa are also a fault lakes

Question 1

3. Volcanoes: caldera fills with water Crater Lake National Park, Oregon

4. Meteors: crater fills with water

Question 2

5. Sinkholes: limestone hollowed out and collapses

Question 3

6. Man-made: dig great big holes or make dams (often called reservoirs)

7. Carolina Bays? Don’t know how they were made GA up to VA

Question 4

Life in lakes: Amount of sunlight determines what lives where

Question 5

Plankton: Very small organisms at bottom of food chain Some like plants, some like animals

Question 6

Lake nutrients: Compounds used by plants, algae, some plankton Ex: nitrates and phosphates

Question 7

Eutrophication: Increase in nutrients Plants and algae grow faster Lake fills in Becomes dry land eventually Pollution can accelerate

Question 8

Turnover: Seasonal mixing in fall and spring Cold rains can also produce

Question 9