Volcanoes can be two broad types: stratovolcano and a shield volcano namely.
In volcanology, viscosity plays a crucial role. High viscous (extremely sticky) magma eruptions typically result in steep-sided volcanoes with 30-35° slopes. This is due to the fact that the viscous volcanic material doesn't flow very far once it is erupted; instead, it accumulates in layers to form a cone-shaped volcano called a stratovolcano. In contrast, shield volcanoes have mild slopes of less than 10° and produce more basalt fluid lavas during eruption. A shield volcano's eruption can cause the basalt to flow far from the vent, creating broad, gentle slopes.
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Answer:
Explanation:
Desertification:
The process of the land degradation in arid , semi - arid , and sub - humid areas because of the factors , human activities , climatic variations .
This process lead to persistent degradation of the dry land and ecosystem because of some variation in climate and man - made activities .
The major cause of Desertification are -
1. Overpopulation
2. Overgrazing
3. Deforestation
4. Unsustainable agriculture techniques
5. Climate change
6. Stripping of land resources .
7. Overgrazing of the land by the cattle and wild stock.
Answer:
1. Litosphere: made of large plates that move.
2. Asthenosphere: plastic portion of the upper mantle of the earth.
3. Outer core: very dense liquid of iron and sulfur.
4. Crust: thin, rigid surface of Earth.
5. Inner core: made of solid iron.
6. Upper mantle: layer that includes the asthenosphere.
7. Lower mantle: layer just outside of the outer core.
Answer:
Explanation:
GIS stands for Geographic Information Systems.
GIS is an environment which is used for collecting, storing, manipulating, analyzing and visualizing geographical data.
The most important aspect of GIS is its capability in handling data with locational attributes which are geographical data.
To use data from the database from a chain of hardware stores, the data must be tied to their respective location i.e they must locational attributes.
Answer:..What kind of rocks are found by coal? Coal is a sedimentary rock.
What kind of rocks are found by copper?Copper minerals and ores are found in both igneous and sedimentary rocks.
Explanation:What kinds of rocks are found by salt?Halite
