Answer: Sixty percent of all active volcanoes occur at the boundaries between tectonic plates most volcanoes are found along a belt, called the “Ring of Fire” that encircles the Pacific Ocean some volcanoes like those that form the Hawaiian Islands, occur in the interior of plates at areas called “hot spots
Answer:
The Sahel is the ecoclimatic and biogeographic zone of transition in Africa between the Sahara to the north and the Sudanian Savanna to the south. Having a semi-arid climate, it stretches across the south-central latitudes of Northern Africa between the Atlantic Ocean and the Red Sea. Wikipedia
Area: 1.179 million mi²
The Sahel has a tropical, hot steppe climate (Köppen climate classification BSh). The climate is typically hot, sunny, dry and somewhat windy all year long. The Sahel's climate is similar to, but less extreme than, the climate of the Sahara desert located just to the north.
Explanation:
Do you mean what caused it? or what the after affects where?
1 is physical. Physical weathering is caused by the effects of changing temperature on rocks, causing the rock to break apart. The process is sometimes assisted by water. There are two main types which are freeze thawing and exfoliation. Physical weathering usually occurs in places where there is little soil and few plants growing like mountains, hot deserts, or tundras(the cold tundras).
One of the evidences that Wegener used for his theory of continental drift was that the mountains in North America appear to be part of the same chain of mountains as those in Northern Europe.
Explanation:
Alfred Wegener is considered to be the first person that managed to gather enough evidence and push through the theory of continental drift. This was not an easy task though, as the technology was still not at as developed as it is now, and also there was big skepticism among the other scientists about his suggestions. Wegener was not discouraged, but instead he totally focused his career on the continental drift theory, and eventually it paid off.
One of the evidence that Wegener was using was that the mountains in the eastern part of North America appear to part of the same chain of mountains as those in Northern Europe. Wegener was right, as the Appalachian Mountain Range and the mountains in Scandinavia are actually formed as part of the same orogeny, and they were indeed connected. Over time Europe and North America drifted apart, but the evidence are there to be seen
Other evidence that Wegener used for his theory are:
- the matching coastlines of South America and Africa
- fossil evidence
- geological evidence
- mid-Atlantic Ocean ridge
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