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AleksAgata [21]
3 years ago
10

How much daily activity does the Centers for Disease Control and Prevention recommend?

Geography
1 answer:
Yuliya22 [10]3 years ago
7 0

Answer: I would say D. (or 4.)

Explanation: Because you start to get warm and sweaty at around 1 hour of exercise. And it reduces the risk of chronic diseases.

(Information found from https://www.cdc.gov physicalactivity, walking)

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Which of the layers of the Earth has the following characteristics? i. It is solid and extremely hot. ii. It is the innermost la
Stella [2.4K]

<u>Answer:</u>

<u>b. inner core</u>

<u />

<u>Explanation:</u>

To solve this problem let's start by listing the information given. This will help us find which option best fits the characteristics provided to find the correct answer.

<u><em>characteristics of mystery layer:</em></u>

<em>i. it is solid and extremely hot</em>

<em>ii. it is the innermost layer of the Earth</em>

<em>iii. it is around 800 miles thick</em>

<em />

Now let's go through each option to determine which best matches the characteristics.

<u><em>option a</em></u>

<u><em>outer core</em></u>

<u><em /></u>

The first characteristic of the mystery layer is 'it is solid and extremely hot.' The outer core of the earth, however, is a fluid layer. Therefore, this option cannot be correct.

<u><em>option b</em></u>

<u><em>inner core</em></u>

<u><em /></u>

The inner core is a solid 'ball' and is about 10,800°F. It is also the inner, or last layer, of the earth and is around 800 miles thick. Therefore, it matches all characteristics of the mystery layer so, this must be the correct answer. If you would like to be sure, I also reviewed the last two options below.

<em><u>option c</u></em>

<em><u>crust</u></em>

<em><u /></em>

Because the crust is the outermost layer of the planet, it does not match the second characteristic of the mystery layer. Therefore, this cannot be the correct answer to the question.

<em><u>option d</u></em>

<em><u>mantle</u></em>

<em><u /></em>

Although the mantle does match the first characteristic, it does not match the second characteristic, which requires the layer to be the innermost layer of the earth. The mantle is one of the outer layers of the earth.

Now that all options are reviewed, we have determined the best solution to the problem. The correct answer to this question is <u>b. inner core</u>.

4 0
3 years ago
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A/An ____________________ ____________________ forms where two plates carrying oceanic crust converge.
umka21 [38]

Answer:

Subduction zone and trench is formed

Explanation:

When two tectonic plates that are comprised of oceanic crust shares a convergent type of plate boundary, then the denser one subducts below the less dense one. Due to this convergent plate motion, a subduction zone is created, which is marked by the presence of an oceanic trench. As the subducting plate penetrates downward into the deeper zone, the process of partial melting takes place, which leads to the melting of the crust and eventually the constituent minerals are mixed with the magma. This magma again comes upward due to the force exerted by the convection current and thereby results in the formation of volcanoes in the over-riding plate.

Thus, the collision of two oceanic plates gives rise to the formation of a subduction zone and a trench.

7 0
3 years ago
Why do Agracultural and natural resource systems vary from state to state.
dimulka [17.4K]

Answer: Agriculture varies so greatly around the world because places are different across the globe. ... Farmers and others who live in rural areas decide how to use land depending on what the usage of the land will be, environmental factors, and agricultural land use patterns.

Explanation:

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Which of the following statements about time zones is true?
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It’s B, they sometimes do follow the borders of countries
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