zizzle67
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PLEASE for the love of god answer these questions for me!!!! It’s urgent.
1. Some igneous rock forms from magma that cools slowly within Earth’s crust. Briefly describe the most likely crystallization and texture of the rock.
2. Other igneous rock forms from lava that cools quickly on Earth’s surface. Classify the rock as either intrusive or extrusive, and identify another word used to describe this type of rock.
3. You are studying a sample of igneous rock. The rock formed on the surface of Earth. It’s made mostly of light-colored minerals. The sample has just a few specks of dark-colored minerals. Classify the rock by type and composition.
4. You are studying a sample of igneous rock. The rock formed within Earth’s crust. The sample contains a very high concentration of dark-colored, high-density minerals. Classify the rock by type and composition.
5. A scientist shows you a sample of rock called gabbro. The scientist explains that gabbro is an intrusive mafic igneous rock. Explain what this means.

Respuesta :

Igneous rock that forms from magma that cools slowly within Earth’s crust is likely to have larger crystals and a coarse-grained texture.

Igneous rock that forms from lava that cools quickly on Earth’s surface is known as extrusive igneous rock. Another word for extrusive is volcanic.

Because the sample of igneous rock formed on Earth’s surface, it is extrusive. Because it’s composed of mostly light-colored minerals, it is likely felsic.

Because the sample of igneous rock formed within Earth’s crust, it is intrusive. Because it contains a very high concentration of dark-colored, high-density minerals, it is likely ultramafic.

The fact that gabbro is an igneous rock suggests that it was formed from the cooling and crystallization of magma. The fact that it is intrusive means that it formed within Earth’s crust. The fact that it’s mafic suggests that it contains a high concentration of dark-colored, high-density minerals.

mickymike92

Igneous rocks can be classified as intrusive or extrusive based on where they are formed in the earth.

What are rocks?

Rocks are large naturally occurring aggregates of minerals cemented together.

There are three types of rocks:

  • igneous rocks
  • metamorphic rocks
  • sedimentary rocks

Igneous rocks are formed from the cooling and crystallization of magma.

Igneous rocks can be classified based on silica content into:

  • felsic- having more than 65 percent silica are called felsic;
  • intermediate - silica content between 5 and 65
  • mafic- between 45 and 55 percent silica content
  • ultranafic- less tha 45 percent

Based on the formation process of rocks;

  • Igneous rock formed from slowly cooled within Earth’s crust will have larger crystals and a coarse-grained texture.
  • Igneous rock that forms from quickly cooled on the Earth’s surface is known as extrusive igneous rock or volcanic rock.
  • the igneous rock is an extrusive igneous rock called felsic.
  • the igneous rock is an intrusive igneous rock called ultramafic.
  • gabbro is an intrusive igneous rock because it was formed within the Earth's crust from the cooling and crystallization of magma. It is mafic because it contains a less silica with a high concentration of dark-colored, high-density minerals.

Therefore, the cooling and crystallization of magma results in igneous rocks formation.

Learn more about igneous rocks at: https://brainly.com/question/1859764

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