How much of Earth's atmosphere is made up of nitrogen and oxygen?A. 100 percent
B. Between 25 and 75 percent
C. Close to 99 percent
D. Less than 1 percent

Answer:

Human geography.

Explanation:

The increasing percentage of urban dwellers in developed countries is best explained by human geography because the population of a region is increased due to the availability of resources. If a region has more quantity of natural resources, the population is increases just like the urban areas. There is higher availability of employment which attracts the people towards itself and the people settle in these urban areas.

Final answer:

The rise in urban dwellers in more-developed countries is caused by urbanization, which is accompanied by improved job opportunities, better services, and higher living standards found in urban areas.

Explanation:

The increasing percentage of urban dwellers in more-developed countries is primarily attributed to urbanization. Urbanization is a socio-economic process by which an increasing percentage of the population of an area becomes concentrated into the towns and cities. This occurs due to numerous factors, such as better job opportunities, greater access to services, and higher standards of living found in urban areas in contrast to rural areas. The availability and accessibility of necessities and facilities such as healthcare, education, and infrastructure also attract people to urban regions. Hence, these urban amenities and potential for growth in urban areas contribute to the increase in the population of urban dwellers in more-developed countries.

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Answer:

divergent plate

Explanation:

• The red sea represents a rift zone where the two tectonic plates spread from the centers. That is the African and the Arabian plate. It forms an extension of the dead sea transform fault system.  

• Magnetic anomalies suggest that this plate spreads at a rate of 1 cm/year. And is followed by a major seafloor spreading and the rift zone includes a basaltic strata volcano located at the northwest passage of the red sea.

Final answer:

D. Chemical weathering turns rocks into soil. It occurs when the minerals within a rock interact with the environment, leading to chemical changes that transform the rock into softer substances. An example is rusting of iron, which is similar to how rock components react with the environment to form soil.

Explanation:

While physical weathering will break a rock into chunks,chemical weathering is the process that turns the rock into soil. Chemical weathering occurs when the minerals within a rock interact with environment factors like water, oxygen, and acids. Over time, these reactions can transform solid rock into softer substances like clay and silt - components often found in soil.

Example of Chemical Weathering

A common example of chemical weathering is the rusting of iron. When iron comes in contact with oxygen and water, it undergoes a chemical change to become rust. Similarly, in chemical weathering, components of rocks react with compounds in the environment, thus eventually leading to the formation of soil.

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Answer:

D

Explanation: