Earthquakes can occur at depths of over 700 km.
Explanation:
The earthquakes are a natural hazard which is associated with boundaries of the tectonic plates. The majority of the earthquakes occur at convergent and transforming plate boundaries. The reason as to why the earthquakes occur at these places is because of the pressure between the colliding or sliding plates, where the crust cracks and during the adjustment the force created is manifested with strong vibrations.
In general, the earthquakes occur at depths between 20 and 50 km, which is usually the depth where the plates create the most pressure upon each other. That is not to say that that is the only range where earthquakes occur, as they can occur anywhere from the surface of Earth and down to 800 km in depth. With other words, the earthquakes occur anywhere from the top of the lithosphere to the top of the astenosphere. Earthquake hot-spots are:
- Ring of Fire
- Mediterranean
- northern Turkey
- western Southwest Asia
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Explanation:
Mechanized culture uses plows to turn grasslands into farms
Climate changes so farms can no longer be sustained
Farmers migrate away
New irrigation technology brings farmers back
One critical aspect that affects population dynamics is the human - environment interaction which is mostly seen in farming activities.
Mechanized farming practices are not sustainable. They use a lot of nutrients in the soil and apply chemicals to crops to maximize outputs. Also farm machinery produce greenhouse gases that leads to global warming eventually climate change.
This can cause the occurrence of drought and farming is no longer possible. Farmers will emigrate from such an area in search for more arable lands.
Development of new irrigation technology is an incentive to bring farmers back into their abandoned farms.
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Answer:
Neither
Explanation:
They are formed by glacial sands deposited on plateaus high above the shore.
Answer:
Option (4)
Explanation:
Water is the most essential element that is required by all living organism. In order to survive, water is needed. Over the years, the use of water has been increasing at a considerably higher rate. At many places, the water level has decreased. This can cause a great problem in the near future as the water on earth is depleting, either by polluting or by making excess use of it.
Currently, water is one of the major resources and one must make limited and proper use of it.
In the United States, a huge amount of water is used for domestic purpose. This includes the water that are usually used for drinking purpose, washing of dishes, toilet flushing, bathing and washing clothes, and so on.
According to the statistical record, it has been noted that in US, the maximum amount of domestic water is used in the toilets.
Thus, the correct answer is option (4).
Rio Grande is the spanish term of the mexican term of the river Rio Bravo del Norte. The river Rio Grande flows from south-central Colorado in the United States and goes out to the Gulf of Mexico.<span>It serves as a </span>natural order<span> between the </span>U.S. state<span> of </span>Texas<span> and the Mexican states </span><span>.</span>In this case, the statement is false.
