Primary sources can be described as those sources that are closest to the origin of the information. They contain raw information and thus, must be interpreted by researchers. Secondary sources are closely related to primary sources and often interpret them.
The higher the pressure of magma inside the volcano the higher the strength of the volcano.
The Andes have formed as a result of a subduction zone while the Himalayas have formed as a result of a convergent plate boundary.
<span>Es un planeta rocoso.</span>
Answer:
stratosphere
Most ozone (about 90%) is found in the stratosphere, which begins about 10–16 kilometers (6–10 miles) above Earth's surface and extends up to about 50 kilo- meters (31 miles) altitude. The stratospheric region with the highest ozone concentration is commonly known as the “ozone layer” (see Figure Q1-2).
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