Please answe each question in a paragraph form. Thank you! Concept Questions 1.

Question

Please answe each question in a paragraph form. Thank you!

Concept Questions 1. Describe how changes in relative sea level create different coastal features. Include at least one example of an increase in relative sea level, and a decrease in relative sea level. 2. Describe two depositional features and two erosional features formed by glaciers. Be sure to include what they look like, and how they form. 3. Explain how and why climate varies naturally, what the evidence is for natural climate change, and how humans today contribute to climate change

Explanation / Answer

1. Whenever there is a rise in the sea level, Some coastal features tend to emerge which appears above the sea level. for example a raised beach which are above the sea level. Some coastal lagoons also emerge but are not permanent. They are expected to shrink as their water source being cut off with increasing height and distance from the sea.

The melting of glaciers at the end of ice ages results in relative sea level rise. Melting ice is filling the oceans but the land can rebound quickly and it rises even faster than the climbing sea level resulting decrease in sea levels.

2. Erosional features: The erosion process carried out by glaciers forms U-shaped and hanging valleys, Cirques and horns.

The valley glacier when flows through a V shaped valley scraping away the sides of the valley. The trimline shows the highest level of glacier reached.

Cirque is hollow and round shaped which is carved in the side of a mountain formed by a glacier. Headwall is the highest cliff of a cirque.

Horn is usually a sharp edged peak which is left behind when glaciers erode all sides of a mountain.

Depositional features: During the process of melting of glaciers, They tend to deposit their sediment. If something if frozen in ice it is expected to be left behind. Depositional features are:

Moraine is a special kind of a sediment which is deposited by a glacier. The lowest layer is considered to be the thickest one.

A drumlin is long hill of sediments deposited by glaciers. When it occurs in a group it is called as a drumlin field.

A Kettle lake is formed when a large piece of ice is left behind in the sediment of a glacier. Due to this a depression is formed and the melting water from the glacier fills it.

3. The climate of Earth totally depends on the amount of energy that flows from the Sun to Earth and then back out into space. If something interferes with this flow of energy changes the climate.

Climate change can occur due to some natural factors which are not expected as well. Volcanoes tend to warm the planet by releasing carbon dioxide which forms a thick layer around the Earth. This layer traps the heat and is not radiated into the space. Asteroids and meteorites when hit the planet throws some dust which blocks the sun. This traps the heat and raises temperature.

Humans have impacted majorly on climatic change. With the increasing usage of fuels, The emission of caron-di-oxide is also increasing. Fossil fuel burning by humans emits tiny particles in addition to releasing CO2 in the atmosphere. Some particles reflect sunlight back to space. Usage of chlorofluorocarbons in the refrigerators has only increased the danger.

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