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Do extrusive rocks have larger grains than intrusive rocks?

No, extrusive rocks typically have smaller grains than intrusive rocks. Extrusive rocks form from lava that cools quickly on the Earth's surface, resulting in fine-grained or glassy textures. In contrast, intrusive rocks form from magma that cools slowly beneath the surface, allowing larger crystals to develop. Thus, intrusive rocks generally have larger grains compared to extrusive rocks.


Why do some igneous rocks have big crystals or grains and some igneous rocks have small crystals or grains?

Igneous rocks with big crystals or grains form from slow cooling beneath the Earth's surface, allowing time for larger crystals to grow. In contrast, igneous rocks with small crystals or grains form from fast cooling at or near the Earth's surface, limiting the time available for crystal growth.


What does a chemist learn about the moon's surface by analyzing moon rocks?

The chemical composition of these rocks is determined. The results showed that these rocks are virtually identical to those of the Earth.


How are rocks and grains different?

Rocks are composed of one or more minerals, while grains are small, individual particles of a mineral. Rocks can be made up of different types of minerals and have a variety of sizes and shapes, while grains are typically uniform in composition and size. Rocks are larger and can be made up of multiple grains, whereas grains are individual, tiny fragments.


When igneous rocks from a volcanic eruption cools what does it form?

When igneous rocks from a volcanic eruption cool, they can form either intrusive or extrusive rocks. Intrusive igneous rocks form when magma cools slowly beneath the Earth's surface, resulting in larger mineral grains. Examples include granite and diorite. Extrusive igneous rocks form when lava cools quickly on the Earth's surface, resulting in smaller mineral grains. Examples include basalt and pumice.

Related Questions

Do extrusive rocks have larger grains than intrusive rocks?

No, extrusive rocks typically have smaller grains than intrusive rocks. Extrusive rocks form from lava that cools quickly on the Earth's surface, resulting in fine-grained or glassy textures. In contrast, intrusive rocks form from magma that cools slowly beneath the surface, allowing larger crystals to develop. Thus, intrusive rocks generally have larger grains compared to extrusive rocks.


Do lava rocks usually have large grains?

Lava rocks typically have fine to medium-sized grains due to their rapid cooling process when formed from molten lava. Large grains are less common in lava rocks than in other types of igneous rocks that cool more slowly beneath the Earth's surface.


Why do some igneous rocks have big crystals or grains and some igneous rocks have small crystals or grains?

Igneous rocks with big crystals or grains form from slow cooling beneath the Earth's surface, allowing time for larger crystals to grow. In contrast, igneous rocks with small crystals or grains form from fast cooling at or near the Earth's surface, limiting the time available for crystal growth.


What does a chemist learn about the moon's surface by analyzing moon rocks?

The chemical composition of these rocks is determined. The results showed that these rocks are virtually identical to those of the Earth.


What wind erosion called causes sand grains to pit and polish rocks when the grains hit them?

This type of wind erosion is called abrasion. It occurs when sand grains carried by the wind hit and scrape against rocks, wearing them down and creating a polished surface.


Rough texture rocks have grains and fine textured rocks have grains?

Yes m that it true, other than glasses all rocks have grains.


How are rocks and grains different?

Rocks are composed of one or more minerals, while grains are small, individual particles of a mineral. Rocks can be made up of different types of minerals and have a variety of sizes and shapes, while grains are typically uniform in composition and size. Rocks are larger and can be made up of multiple grains, whereas grains are individual, tiny fragments.


What is the upper surface of groundwater?

The upper surface of groundwater is called the unsaturated zone. The unsaturated upper surface contains water, as well as spaces of air, particle grains and rocks.


Where is the placing of the ice on the moon?

The ice that was recently determined to be in the moon surface rocks is in the polar region of the moon.


When igneous rocks from a volcanic eruption cools what does it form?

When igneous rocks from a volcanic eruption cool, they can form either intrusive or extrusive rocks. Intrusive igneous rocks form when magma cools slowly beneath the Earth's surface, resulting in larger mineral grains. Examples include granite and diorite. Extrusive igneous rocks form when lava cools quickly on the Earth's surface, resulting in smaller mineral grains. Examples include basalt and pumice.


How do course-grained rocks form?

Course-grained rocks form when mineral grains are large enough to be visible with the naked eye. This usually happens when rocks cool slowly beneath the Earth's surface, allowing larger mineral grains to grow. Examples of coarse-grained rocks include granite and diorite.


What are tiny rocks as small as grains of salt called?

Tiny rocks the size of salt grains are generally called, "Sand".