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fast cooling rate forms smaller crystals eg Andesite
slow cooling rate forms large crystals eg.Pegmatite

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What determines how large the crystals and an igneous rock Will be?

The speed at which the magma/lava cools ie. fast cooling = not much time for crystals to form = little or no small crystals slow cooling = much time for crystals to form = big crystals


What determines crystal size in an igneous rock?

It depends on the cooling of lava. Slow cooling forms big crystals deep under the surface while fast cooling creates small crystals on or just below the earths surface. Itstant cooling wouls have no crystals.


What forms in earths crust when molten material reaches the surface?

When molten material reaches the surface of the Earth, it can solidify into different forms depending on the speed of cooling. If it cools quickly, it forms extrusive igneous rocks like basalt. If it cools slowly underground, it forms intrusive igneous rocks like granite.


What is the rate of cooling in reference to magma and lava?

The rate of cooling of magma and lava depends on various factors such as the environment it is in, the size of the magma/lava body, and its composition. Typically, smaller lava flows cool more quickly than larger magma chambers underground. Rapid cooling can lead to the formation of fine-grained rocks like basalt, while slower cooling can result in coarser-grained rocks like granite.


How does the rate of cooling affect crystal growth in igneous rock?

The most common effect is that more and smaller crystals form than would be formed with slow cooling of the same mass of the same crystalizable material, and the incidence of crystal defects is higher because the rapidity of crystal formation does not permit the correction of initially formed defects by interchange of atoms or other crystal forming units between the liquid and solid phases that can occur during slow crystallization.

Related Questions

What determines how large the crystals and an igneous rock Will be?

The speed at which the magma/lava cools ie. fast cooling = not much time for crystals to form = little or no small crystals slow cooling = much time for crystals to form = big crystals


Does wind speed affect the rate of cooling an object?

yes


What determines crystal size in an igneous rock?

It depends on the cooling of lava. Slow cooling forms big crystals deep under the surface while fast cooling creates small crystals on or just below the earths surface. Itstant cooling wouls have no crystals.


What forms in earths crust when molten material reaches the surface?

When molten material reaches the surface of the Earth, it can solidify into different forms depending on the speed of cooling. If it cools quickly, it forms extrusive igneous rocks like basalt. If it cools slowly underground, it forms intrusive igneous rocks like granite.


What causes the variation of crystals in volcanoes?

The variation of crystals in volcanoes is mainly caused by differences in temperature, pressure, and composition of the magma. Factors such as cooling rate, chemical reactions, and the presence of gas bubbles can also influence crystal formation. Additionally, the depth and location of magma storage within the volcano can lead to variations in crystal size and shape.


What is the rate of cooling in reference to magma and lava?

The rate of cooling of magma and lava depends on various factors such as the environment it is in, the size of the magma/lava body, and its composition. Typically, smaller lava flows cool more quickly than larger magma chambers underground. Rapid cooling can lead to the formation of fine-grained rocks like basalt, while slower cooling can result in coarser-grained rocks like granite.


How does the rate of cooling affect crystal growth in igneous rock?

The most common effect is that more and smaller crystals form than would be formed with slow cooling of the same mass of the same crystalizable material, and the incidence of crystal defects is higher because the rapidity of crystal formation does not permit the correction of initially formed defects by interchange of atoms or other crystal forming units between the liquid and solid phases that can occur during slow crystallization.


Why would the crystals in an intrusive igneous rock be larger than the crystals in a chemical sedimentary rock?

Think about this: When molten rock cools slowly, bigger crystals are created.Then think about this: Intrusive rocks cool quite slowly because they are created in the earth's crust.So... Intrusive igneous rocks have bigger crystals. Molten magma in the earth's crust cools slowly making rocks like granite with big crystals.Get it? got it?GOOD!!


Why do rocks formed from lava have small crystals?

That's because of the cooling speed. When a magma or a lava cools, it forms crystals. The longer these crystals have the time to form, the larger they will be. However, at the surface, the lava cools relatively fast (at least, compared to magma that stays inside the earth). The crystals in the rock that forms that way don't have a lot of time to form, so don't grow big.


What type of rock is a crystal rock?

Virtually all rock contains mineral crystals of various sizes. Most volcanic rocks such as granite contain crystals of quartz and other minerals. Crystal size varies depending on the speed of cooling.


How does wind speed affect the rate of a cooling object?

Wind speed affects the rate of cooling of an object by increasing the rate of heat transfer through convection. Higher wind speeds result in a greater exchange of air around the object, carrying away heat more efficiently and thus cooling the object faster.


Does sunlight affect crystal growth?

Yes, sunlight can affect crystal growth by providing heat energy which can speed up the process. It can also cause fading or discoloration in some crystals due to exposure to UV radiation. Properly shielding crystals from direct sunlight can help control the growth process more effectively.