How is a lake formed

Glaciers become wider and deeper than the surrounding valley. Also called blue-green algae (even though it is not algae) and (in freshwater habitats) pond scum.structure built across a river or other waterway to control the flow of water.remains of something broken or destroyed; waste, or garbage.having parts or molecules that are packed closely together.area of land that receives no more than 25 centimeters (10 inches) of precipitation a year.lake whose waters mix twice a year, usually in the fall and spring.very large, extinct reptile chiefly from the Mesozoic Era, 251 million to 65 million years ago.tiny, dry particles of material solid enough for wind to carry.the sudden shaking of Earth's crust caused by the release of energy along fault lines or from volcanic activity.community and interactions of living and nonliving things in an area.fish with a long body and no fins on the lower surface of the body.set of physical phenomena associated with the presence and flow of electric charge.conditions that surround and influence an organism or community.release of material from an opening in the Earth's crust.build-up of sediment and organic matter in bodies of water, which may cause a change in the productivity of the ecosystem.one or more buildings used for the manufacture of a product.a crack in the Earth's crust where there has been movement.nutrient-rich chemical substance (natural or manmade) applied to soil to encourage plant growth.to remove particles from a substance by passing the substance through a screen or other material that catches larger particles and lets the rest of the substance pass through.group of organisms linked in order of the food they eat, from producers to consumers, and from prey, predators, scavengers, and decomposers.all related food chains in an ecosystem.

For example, the thermal stratification and the degree and frequency of mixing exerts a strong control on the distribution of oxygen within it.

One major way of classification lakes in on the basis of thermal stratification because it is a major control on animal and plant life inhabiting a lake and the fate and distribution Use these classroom resources to help students explore and learn about these places.One of the main components of Earth’s interdependent physical systems is the hydrosphere. The relative abundance of each depends upon the nature of the local drainage basin, the climate, and the relative age of a lake. This lack of predators often causes some wicked problems in the place it colonizes. Well, some are introduced purposely by humans, such as the European hare which was brought to Australia in the 1830s, and some are introduced by accident, like the emerald ash borer, which has wiped out native ash trees in the Midwest and the Eastern United States. of dissolved and suspended material in a lake.

(2005). Teach your students about the Earth’s hydrosphere with the resources in this collection.Satellite image of Houghton Lake, a large in land lake.An oxbow lake starts out as a curve, or meander, in a river.

Also called indigenous species.chemical element with the symbol N, whose gas form is 78% of the Earth's atmosphere.a type of plant or animal that is not indigenous to a particular area. Upon viewing the miles of blue water at Crater Lake National Park, visitors often speculate: How did a lake get on top of a mountain? "Lakes on Earth, Different Types". It is also home to many diverse fish, plant, and crustacean species. Goudie, A. Also called compact fluorescent lamp.legislative branch of the government, responsible for making laws. A cob, pen, and cygnets—male, female, and baby swans—enjoy a day on the lake. In addition to their origin, there are various other ways of either naming or defining types of lakes. As water flows over and through the landscape, it transports materials like plastics, and often times, pollutants, moving them downstream and ultimately to the ocean. An even smaller amount can be used as drinking water. (1929-1941) period of very low economic activity in the U.S. and throughout the world.largest freshwater bodies in the world, located in the United States and Canada. (2008). All rights reserved.A lake is a body of water that is surrounded by land. Also called a mudflow.large freshwater fish. As a result, there are a wide variety of different types of glacial lakes and it is often difficult to define clear-cut distinctions between different types of glacial lakes and lakes influenced by other activities. They are found on every continent and in every kind of environmentin mountains and deserts, on plains, and near seashores. Stratification within a lake can also be the result of differences in density resulting from gradients in Lakes are informally classified and named according to the seasonal variation in their lake level and volume. Explore the new worlds of these alien species with this collection of resources.Freshwater is a precious resource on the Earth's surface. Non-native species can sometimes cause economic or environmental harm as an invasive species.substance an organism needs for energy, growth, and life.large body of salt water that covers most of the Earth.inland body of fresh water with a river or other body of water flowing out of it.deposit in the Earth of minerals containing valuable metal.chemical element with the symbol O, whose gas form is 21% of the Earth's atmosphere.to sit or rest on a tree branch or other elevated position.measure of a substance's acid or basic composition.

Significant input sources are precipitation onto the lake, runoff carried by streams and channels from the lake's A paired (black and white) layer of the varved lake sediments correspond to a year. The hydrosphere is the sum of Earth’s water, in the ocean, the ground, on the surface, and in the air. Distilled water is neutral, a 7 on the pH scale. Some of the types of lakes include: This shape leads to erosion of the valley floor, particularly where the thickened ice meets softer rock.

(singular: alga) diverse group of aquatic organisms, the largest of which are seaweeds.the rapid increase of algae in an aquatic environment.person who studies artifacts and lifestyles of ancient cultures.