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3 years ago

Analyze the effect that plentiful harvests had on population in the ancient civilizations of the mainland's river valleys

1 answer:

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One effect that plentiful harvests had on ancient civilizations of the mainland's river valleys was to help have larger populations and the need to have materials to survive.

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Mention any two benefits of water conservation

vichka [17]

Answer:

water will remain for more time on earth

Explanation:

this is the correct answer you want.

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3 years ago

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• What is the prime source of energy villages of india

AnnZ [28]

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3 years ago

If the earth is 4.6 billion years old, why is the oldest ocean floor only 180 million years old?

borishaifa [10]

the oldest ocean floor is only 180 million years old, because the oldest crust is destroyed at subduction zones.

<h3>What are subduction zones?</h3>

According to NOAA, tectonic plates are fragments of the Earth's hard outer layer that steadily travel across the surface of the globe over millions of years (opens in new tab). (This is a fundamental principle of the theory of plate tectonics, which holds that pieces of the Earth's crust slide across the lower mantle and carry continents with them.) According to the U.S. Geological Survey(opens in new tab), the Earth's crust and the top part of the mantle, a thick, heated layer under the crust, make up that outer layer, also known as the lithosphere (USGS). This lithosphere material curls downward into the heated mantle during subduction zones, when two tectonic plates collide and one slides beneath the other.

To know more about subduction zones, visit;

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1 year ago

Environmental conditions in coastal estuaries vary hourly and seasonally.

n200080 [17]

a) TWO important causes for the variation in the temperature and/or salinity of an estuary as follows:

Salinity will vary hourly, because of the tides. Temperature will vary depending on the time of year. Solar radiation, different in winter than in summer, changes the temperature.

b) TWO roles that coastal wetlands play Ecologically

they provide a habitat for various wildlife
provide nutrient cycling, or soak up excess nutrients.

TWO roles that wetlands play Economically

they provide a location for fishing and other sources of recreation
reduce flooding and erosion.

c) THREE ways in which humans have had a negative impact on or have degraded coastal wetlands as follows:

They have removed wetlands for agricultural purposes

more use of groundwater, which reduces the balance of the ecosystem

have water pollution, plants harvest, and birds hunt.

d) Overused groundwater can be reduced by charging user fees to those who use it, as well as increasing the number of wildlife refugees, which will restrict available land for groundwater use.

Explanation:

Estuary is a land form that formed in the lower course of a river where river enters into the sea. Here temperature and salinity varies with solar radiation as the intensity of sun rays different season wise. During the time of tides salinity level does fluctuate.

Wetland is a very important feature of environment. It is also known as the kidney of environment and it acts as a natural habitat for the animals and economically important zone for the fishing. It is also a recreation zone. With increasing population over burden on agricultural land enhances adversities on environment.

7 0

3 years ago

The area in the middle of the topographic profile would have a ______, whereas the areas to either side have a

S_A_V [24]

An area in the middle of the topographic profile would have a moderate relief whereas the areas to either side have a low relief

<h3>What is a topographic profile? </h3>

Topographic profile refers to a cross-sectional view along a line drawn through a portion of a topographic map

In conclusion, the area in the middle of the topographic profile would have a moderate relief whereas the areas to either side have a low relief