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pochemuha
3 years ago
10

Why are some igneous rocks coarse and others are smooth

Geography
1 answer:
Ierofanga [76]3 years ago
6 0

The reason why some igneous rocks are smooth and some are coarse is the manner in which they formed. We can simply divide the igneous rocks into intrusive and extrusive ones.

The intrusive igneous rocks are formed deep into the ground. The magma that has formed this rocks has been exposed to higher temperatures and pressures. That has led to a very slow cooling off of the magma. Because the magma has been cooling off slowly, the crystals had time and the right conditions to grow larger, thus making the intrusive igneous rocks coarse.

The extrusive igneous rocks are formed on the surface. They have been formed by the lava that once it come out on the surface has been exposed to much lower temperatures and pressures. That has led to very quick cooling off of the lava. Because the lava has cooled off quickly, the crystals didn't had time to grow in size, thus they have remained very small, almost unnoticeable, thus making the extrusive igneous rocks smoother.

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sladkih [1.3K]

Answer:

The Panama canal

Explanation:

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It takes just a few hours to cross from one side to the other, while it would take weeks to go down to the tip of South America and back up.

In 2016, the canal opened new locks, that can receive larger boats.

3 0
3 years ago
Question 7
nekit [7.7K]

Answer:

The correct answer will be-

Case I- option-B

Case-II-option-B

Explanation:

A scientific method is the best procedural approach to explain the natural phenomenon. The method includes various steps which begin with the making the observation. The observation leads to the asking the scientific questions which could be answered by proposing a hypothesis.  

The hypothesis must be tested through experiments which could prove and disprove the hypothesis and can answer the natural phenomenon.

<u>Case-I</u>

In the given situation of the question in which a person notices or observes the fields of grass and grass and native flower.  Since the researcher notices the fields, they are performing the first step of the method that is "making an observation" and thus Option-B is the correct answer.

<u>Case-II</u>

In the situation, which discusses the number of birds in the fields shows the "dependent variables". The dependent variable is the parameter which is studied in the experiments. Since in the given conditions the number of birds is being studied, therefore, Option-B is the correct answer.

3 0
3 years ago
New Zealand's natural geography supplies its people with what three sources of income?
irinina [24]

The natural geography of New Zealand supplies its people with the major sources of income which are timber, tourism and natural gas.

Options B, C and E are correct.

<h3>What is geography?</h3>

The examination of relation of places, people and their environments in which they are surviving is called the geography.

  • New Zealand is one of the regions founded in the southeastern side of the Pacific Ocean. It is a location composed mountainous islands being separated into two islands namely, Northern and Southern.
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Therefore, apart from the options A and D, all options are correct.

Learn more about geography in the related link:

brainly.com/question/1462956

#SPJ1

5 0
2 years ago
How would a historian use this political map to study Roman civilization?
galben [10]

Answer:

Hello. You have not attached the map to which this question refers, which makes it impossible for your question to be answered. However, I can help you by showing that the political map can be used by a historian who wants to study the distribution and division of Roman society within Roman territory.

Explanation:

A political map is used when a stylist wants to analyze the administrative division of a territory, showing the border of that territory with neighboring territories and also showing the internal borders that show the divisions within the territory.

In this case, we can say that a historian would use a political map to analyze the geographic distribution and population concentrations of Roman civilization.

6 0
3 years ago
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7 0
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