Answer:
The answer is the Geography Hypothesis.
Explanation:
The geography hypothesis holds that the differences in prosperity that are found around the world are due in large part to forces of nature, like the differences in geography, climate, and ecology that are evident in different regions of the world. The geography hypothesis emphasizes how the natural environment can explain why some nations are more prosperous than others. In contrast, the institutions hypothesis emphasizes the influences that are made and caused by humans. Human poverty is largely man-made in the institutions view.
Basalt is the rock that makes up a majority of the oceans floor!
Answer:The quality or state of being volcanic; volcanic activity. ... The level of power of a volcano.
Explanation:
Answer:
b. flat rotation curves in spiral galaxies
Explanation:
Dark matter accounts for majority of the matter in the universe (about 85%). It is considered to be composed of subatomic particles which are yet to be discovered. Dark matter cannot be observed because it does not emit light that can be detected. Only its gravitational effect is visible.
Astronomers when calculated the mass of the visible matter and tried to account for the observed speed of stars in the galaxy, there was a mismatch. To understand what caused this mismatch, astronomers gave name to the invisible matter as the Dark Matter.
The expected velocity of stars should decrease away from the near the center of the galaxy but a constant velocity of stars was observed that is a relatively flat rotation curve was obtained.
Thus, flat rotation curves in spiral galaxies in an evidence of Dark Matter.
Answer: convergent plate boundries
Explanation:
At convergent plate boundaries, where two continental plates collide earthquakes are deep and also very powerful. In general, the deepest and the most powerful earthquakes occur at plate collision (or subduction) zones at convergent plate boundaries.
