Lava flows are the least hazardous of all processes in volcanic eruptions. How far a lava flow travels depends on the flows temperature, silica content, extrusion rate, and slope of the land. A cold lava flow will not travel far and neither will one that has a high silica content. Such a flow would have a high viscosity<span> (a high resistance to flow). A basalt flow like those in Hawai'i have low silica contents and low viscosities so they can flow long distances. Such a flow can move as far away as 4 km from its source and have a thickness of 10 m (Bryant, 1991). These flows can move at rates of several kilometers per hour (Scott, 1989). </span><span>More silica-rich flows can move as far away as 1.3 km from their sources and have thicknesses of 100 m (Bryant, 1991). These flows can move at rates of a few to hundreds of meters per hour (Scott, 1989). If a lava flow is channelized or travels underground in a lava tube then the distance it travels is greatly extended.</span>
<u>Answer:</u>
The statement 'south of London' is an example of 'absolute location' is false.
<u>Explanation:</u>
- A location can be said to be an absolute location when it is defined with exact longitudinal and latitudinal coordinates.
- For instance, the Royal Observatory in Greenwich, London can be said to be an example of 'absolute location' because its location can be pinpointed with the help of longitudes and latitudes.
- When we say south of London, it can be the entire area that falls south of London, which cannot be an example of an 'absolute location'.
The Yangtze River is 6,300 kilometers long
Explanation:
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Answer:
This can happen in windy climates. Such as windy storms or a tornado.
