Therefore, mechanical weathering speeds up the processes of chemical weathering. The broken rock material now has more surface material on which chemicals in the environment can act. This occurs when physical forces break the rock into smaller and smaller pieces without changing its mineral compositions. Because of these changes, rock is fragmented by various forces, decomposed by chemical action, or both. Weathering is the response of earth matter to environmental changes which disturb the equilibrium or balance, which can only be regained by the breakup of rock into smaller pieces, and/or removal of rock material from one place to another. Weathering is the term used to describe the processes by which rock is disintegrated and decomposed on or near the earth’s surface, due to external forces such as wind, water and temperature. ![]() Research an environmental problem in your area, and discuss possible solutions.įORCES THAT CAUSE SURFACE CHANGES Weathering.Identify the rules and laws used to date fossils.Research what life forms (plant and animal) inhabited your region before the formation of humans.Explain why your region has its overall climate.Create a questionnaire to determine understanding of the Greenhouse Effect or the Ozone layer.Explain the highs and lows associated with air pressure, and how they affect weather.Keep a record of atmospheric and weather changes in your environment.Name the three main layers of the ocean, describe the characteristics and ocean life in each.Explain how the speed of a stream affects the shape of the landscape.Describe four ways that weathering breaks down rocks to help form soil.Collect and classify rock samples as either sedimentary rock, igneous rock, or metamorphic rock.Research how a mountain/mountain range in or near your region was formed.Identify environmental issues which are of current significance.Describe the way in which the earth’s surface has changed over time.Identify global weather patterns and their relationship to different climates.Describe some well known effects of particular atmospheric conditions like the Greenhouse effect.Describe the earth’s atmosphere and the forces which create weather.Describe the oceans of the earth and their role in global processes.Explain external processes that that cause topographic and soil changes on the earth’s surface.Classify rocks and minerals according to their characteristics and formation.Describe the major structural elements of Earth and the major internal forces which affect them.Radiometric Dating radiocarbon dating, radioactivity, half lifeĮach lesson culminates in an assignment which is submitted to the school, marked by the school's tutors and returned to you with any relevant suggestions, comments, and if necessary, extra reading.Climate Classification Tropics, Dry Climates, Humid Mid Latitude and Mild Climates, Polar Climates, etc. ![]() Anthropomorphic Changes to Global Climates.Wind Local Winds, Wind Erosion, Wind in Arid Climates.Structure of the Atmosphere, Troposphere, Stratosphere, Mesosphere, Seasons.Atmosphere and Circulation of Essential Elements. ![]()
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