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Lunna [17]
3 years ago
5

What percentage of geologic time is represented by recorded history? (Assume 5000 years for the length of recorded history.)

Geography
1 answer:
Ray Of Light [21]3 years ago
3 0

Answer:

only about 20% - 35%

Explanation:

We do not know that much about the earth itself, and people just recently started discovering the earth for what it truly is. Though, we have been recording earthquakes and tsunamis since the early 19th century.

This makes up anywhere from 20% to 35%. It is hard to know the exact percentage for sure.

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A small island in the open ocean is receiving swell coming from the southeast. Yet, waves break all around its shores, not just
denis-greek [22]

A) Refraction

B) Erosion

C) Reflection

D) Diffraction

E) Isostasy

Answer: B) Erosion

Explanation:

Erosion is a natural phenomena in which the top layer of soil or any other sedimentary material gets removed by the action of the physical agents like water, wind, and others.

According to the given situation, the waves will break the shores those which were facing the southeast. Thus the Island will get disturbed by the phenomena due to erosion.

   

4 0
3 years ago
What are the four main causes of erosion caused by humans?
viva [34]

Explanation:

deforestation, watering, agriculture, mining

5 0
3 years ago
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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;

brainly.com/question/13788626?referrer=searchResults

#SPJ4

5 0
1 year ago
During a solar eclipse the darkest part of the shadow is called
Mekhanik [1.2K]
<span> umbra I hope this helps you out!!</span>
7 0
3 years ago
Is population growth a problem? Why or why not
EastWind [94]

Answer:

Population growth is a problem.

Explanation:

Population is a problem because we have to worry about if we have enough resources to support them and there has been a scientific study done that proves more carbon dioxide is put into the air which doesn't help with air pollution.

7 0
4 years ago
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