Refraction has an important affect on waves that travel through Earth. In general, the seismic velocity in Earth increases with depth (there are some important exceptions to this trend) and refraction of waves causes the path followed by body waves to curve upward.
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I think its better to live somewhere with higher levels of life expectancy because you know its a safe area for you and your family
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Mantle
Explanation:
The pressure within the earth causes the magma to move around in convection currents, which causes a shift in the tectonic plates.
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Domesticating plants marked a major turning point for humans. The beginning of an agricultural way of life and more permanent civilizations. Humans no longer had to wander to hunt animals and gather plants for their food supplies. Agriculture, the cultivating of domestic plants allowed fewer people to provide more food.