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Let Me Explain to You a Thing. Grassland. The Concept of the Ecosystem. "I bequeathe myself to the dirt, to grow from the grass I love;If you want me again, look for me under your boot-soles. "- Walt Whitman In this lesson, we will learn answers to the following questions: What is an ecosystem, and how can we study one? Is the earth an open or closed system with respect to energy and elements? Introduction - What is an Ecosystem? An ecosystem consists of the biological community that occurs in some locale, and the physical and chemical factors that make up its non-living or abiotic environment. The study of ecosystems mainly consists of the study of certain processes that link the living, or biotic, components to the non-living, or abiotic, components. Studies of individuals are concerned mostly about physiology, reproduction, development or behavior, and studies of populations usually focus on the habitat and resource needs of individual species, their group behaviors, population growth, and what limits their abundance or causes extinction.

Figure 1. 1. 2. Lacs. Climates and biomes. 3D Geography - helping with the teaching and learning of Geography. Let Me Explain to You a Thing. River-anatomy-1.pdf. How Lakes Differ - Lake Scientist. Types of Water Bodies Susanna Scott | Miami University Lakes vs. Ponds Both lakes and ponds are standing or slow-moving bodies of water. There are no official or scientific differences between lakes and ponds. Does light reach the bottom of the deepest point of the water body? If these questions can be answered with a “yes,” the water body is likely a pond and not a lake.1 Although vernal pools dry up regularly, they are important sites for breeding and feeding for many organisms (Image from 4). Ponds are often overlooked as habitats and sources of biodiversity, but they play many important roles in the landscape.

Ponds also provide many uses for society. Lakes vs. Lakes and ponds are standing bodies of water while rivers and streams are distinguished by a fast-moving current. River systems make up about 0.0001% of the Earth’s water. Lakes vs. Reservoirs, also called impoundments, are man-made lakes. However, some reservoirs maintain river-like qualities throughout. Freshwater vs. Sources: How Volcanoes Work. Virtual Cave-Solutional Caves. The Virtual Cave: Seacaves. Sea caves are formed by the power of the ocean (or in some cases, lakes) attacking zones of weakness in coastal cliffs. The weak zone is usually a fault, or fractured zone formed during slippage. Another type of weak zone is formed where dissimilar types of rocks are interbedded and one is weaker than the other. Typically this is a dike, or intrusive vein of more easily eroded rock found within a stronger host rock. Yet a third instance is in sedimentary rocks where a layer of softer rock is interbedded between harder layers.

The cave may begin as a very narrow crack into which waves can penetrate and exert tremendous force, cracking the rock from within by both the weight of the water and by compression of air. Sand and rock carried by waves produce additional erosive power on the cave's walls. Sea caves rarely have formations like solution caves or lava tubes, so we're just devoting one page to them here in The Virtual Cave.

Out of the frying pan and into the desert. That will teach me to try and be clever so early in the morning. I have had George Meredith's poem "Love in the Valley" bouncing around in my head for five days now. I am typing a verse of it here so that it will shut up and stop bothering me. Mother of the dews, dark eye-lash’d twilight, Low-lidded twilight, o’er the valley’s brim, Rounding on thy breast sings the dew-delighted skylark, Clear as though the dewdrops had their voice in him.

Hidden where the rose-flush drinks the rayless planet, Fountain-full he pours the spraying fountain-showers. Let me hear her laughter, I would have her ever Cool as dew in twilight, the lark above the flowers 1) Vary the desert landscape. The deserts in fantasy seem to be dunes, dunes, dunes, and sometimes flat plains of sand, with an oasis or two. There are other types of desert landscape. Dunes are nice, admittedly, and can provide a lot of excitement in the hands of a good author. It's the fantasy author's job to make them interesting. -Flowers.

Types of Dunes. How are deserts made. Cave Formations. Example of an Anthodite formation. This picture was taken in Skyline Caverns, which is one of the only public places you can view them. The picture below is also another photo taken from Skyline Caverns of the "Reflecting Pool", an optical illusion which forces the viewer to believe the pool of water is many feet deep, when it is only a few inches deep.

The shot above is another example of the unique Anthodites of Skyline Caverns. The shot below is an example of a helictite. This is an Aragonite formation found in Lechuguilla near Carlsbad Caverns in New Mexico. A Bottlebrush formation with Pool Spar. Ohio Caverns are located in West Liberty, Ohio. In Almeria, Spain a giant cave of gypsum was discovered. Snotites are one of the few cave formations not developed by Calcite, Aragonite or even Carbonic Acid. Unique Cave Formations Courtesy of 9. 11. 12.