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A short class with Sarah and her students. The other ways are under More.
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Welcome class! Today we are exploring internal processes in geomorphology. Can anyone tell me what 'internal processes' refers to in this context?
Are they the processes that happen inside the Earth?
Exactly! Internal processes include volcanism, tectonic uplift, and earthquakes. Can someone explain how these processes can shape landforms?
Volcanism can create volcanoes and islands, right?
Yes, great point! When magma erupts and cools, it forms new land. Now, can anyone tell me how tectonic uplift occurs?
That's when Earth's plates collide and push up the land to form mountains!
Correct! Tectonic activity can lead to impressive mountain ranges. Remember the acronym 'VTE' for volcanism, tectonic uplift, and earthquakes to help you recall these concepts.
In summary, internal processes are crucial for geomorphology and include volcanism, tectonic uplift, and earthquakes.
Now let's shift to external processes. Do any of you know what external processes refer to in geomorphology?
Isn't it the processes that happen on the Earth's surface, like weathering?
Exactly! Weathering is one of the key external processes. Can someone explain what weathering involves?
It's the breakdown of rocks due to various factors like wind and water.
Correct! Weathering can lead to different landforms. What about erosion? What can you tell me about that?
Erosion is when materials are removed and transported by natural forces like water or wind.
Wonderful! Erosion plays a vital role in shaping valleys and canyons. Let’s not forget deposition, where sediments can accumulate to form deltas. Remember the acronym 'WED' for weathering, erosion, and deposition.
To summarize, external processes like weathering, erosion, and deposition significantly influence landform characteristics.
Now, let's discuss different types of landforms. Can anyone name a type of landform?
Mountains!
Correct! Mountains are formed primarily through tectonic activity. What are some other types?
Plains and plateaus!
Exactly! Plains are flat areas often formed by sediment deposition, while plateaus are elevated flatlands. Can anyone tell me how valleys are formed?
They are formed through erosion by rivers!
Right! Valleys are shaped by the erosive work of rivers. Lastly, what about deltas?
Deltas form where rivers deposit sediment as they enter a larger body of water.
Excellent! Remember the types: Mountains, Plains, Plateaus, Valleys, and Deltas can be recalled with the acronym 'MPPVD.'
In summary, we've discussed the various types of landforms and how they are shaped by both internal and external processes.
The study of how landforms are created and shaped over time by various geological processes.
Geophysical processes like volcanism and tectonic movements that alter the Earth's structure from within.
Environmental processes including weathering, erosion, and deposition, which change landforms externally.
When rocks weather away, to soil they play, / Erosion sweeps them, day by day.
Imagine a mountain standing tall, / Over time it weathers, breaks, and falls. / Rivers carry stones away, / Turning mountains into plains they say.
Remember 'WED' for Weathering, Erosion, and Deposition to recall the external processes.
Use 'VTE' to remember Volcanism, Tectonic uplift, and Earthquakes for internal processes.
Term
Geomorphology
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Volcanism
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Erosion
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Weathering
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The study of landforms and the processes that shape them.
The process by which magma from the Earth's interior erupts to the surface.
The upward movement of the Earth's crust due to tectonic forces.
The breakdown of rocks through physical, chemical, or biological means.
The process of removing and transporting sediment by natural forces.
The accumulation of sediment transported by wind, water, or ice.
Natural features on the Earth's surface, such as mountains and valleys.
Geomorphology is the study of landforms and the processes that shape them, focusing on both internal and external geological forces.
This section delves into geomorphology, the branch of physical geography that examines landforms and their formation processes. It categorizes the forces that influence landforms into internal processes like volcanism and tectonic uplift, and external processes such as weathering, erosion, and deposition. Understanding these concepts is crucial for comprehending Earth's landscapes and their evolution over time.
Geomorphology is a vital scientific discipline within physical geography dedicated to understanding the formation, evolution, and classification of landforms. This subfield explores how various processes—both internal and external—affect Earth’s surface. The formation of landforms is influenced by:
These processes originate from within the Earth and include:
These are processes that occur on Earth's surface and include:
Geomorphology categorizes landforms into various types, including:
Understanding the processes governing geomorphology provides insights into the dynamic nature of Earth’s landscape. It is also essential for predicting natural hazards, resource management, and planning for sustainable human development.