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Bezzdna [24]
3 years ago
7

Which front forms when air moves into an area by cooler air

Geography
1 answer:
Darina [25.2K]3 years ago
5 0
A cold front forms when cold air moves into an area occupied by warmer air
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Which three states capital of the north central region are named for president of united states?
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Soloha48 [4]
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Which of the following innovations best explains the population change that occurred between 5,000 BCE and 500 BCE, as shown on
zysi [14]
<span>Good Morning!

The specialization of work is as old as the first human groupings, and it was through division by sex. The invention of the wheel dates from at least 2000 years before Christ, and can be extended up to 3,500 years if we take into account the first illustrations of a wheel. The controlled use of fire, in turn, dates back more than a million years, while the development of agriculture is about 10,000 years old. Thus, among the discoveries and inventions pointed out. It is worth noting, however, that the invention of the wheel, while important, would not contribute to such a large population growth.

Agriculture (letter d), gradually improved from 5,000 BC, is the fundamental factor for population growth, which could now settle, rather than live as a nomad.

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5 0
3 years ago
Explain how scientists use seismic data to learn about the geologic activity and happenings in the earth's interior
Mekhanik [1.2K]

Answer:

Explained below

Explanation:

In physics, we know that waves usually change direction when are refracted or when they penetrate layers with different densities.

Therefore, when a seismic wave penetrates penetrates the boundary of the earth's interior, part of it will be sent back and part will be transmitted into the medium as refraction occurs. When we record the reflected and refracted ray, it enables the calculation of the position of major boundaries in the Earth's interior. This also helps in providing information about the solid & liquid character as well physical properties of the various layers in the medium.

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Calculate population density<br><br> population=300<br> Area (km)2 = 40<br> population density=?
jeka94

decimal form

7.5

exact shape

15/2

mixed number form

7½

4 0
3 years ago
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