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It depends on the type of rock. The hardness of a penny is about a 3,so probably yes

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13y ago

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What are the classifications of igneous rocks?

it can get scratch by a diamond


When molten rocks cools what rocks form?

igneous rocks


What are igneous rocks that form over the surface?

Rhyolititcen rocks.


What do you call rocks that have been formed from the hot molten material within the earth's crust that has cooled and hardened?

Igneous rocks are formed by the solidification of molten materials.


Are igneous rocks made up of igneous rocks?

Sedimentary rock can be made up partially of igneous clasts, but igneous rock is igneous rock.


Can sedimentary rocks be scratched by a penny?

Yes, sedimentary rocks can often be scratched by a penny, as they typically have a hardness of 3 to 4 on the Mohs scale. A penny, made primarily of copper, has a hardness of about 3.5, allowing it to scratch softer sedimentary rocks like limestone or sandstone. However, harder sedimentary rocks like some shales may resist being scratched by a penny.


Are volcanic rocks igneous rocks?

Yes. Volcanic rocks are extrusive igneous rocks.


Why are igneous are called primary rocks?

Igneous rocks


Are sedimentary rocks are harder than igneous rocks?

No, igneous rocks are harder than sedimentary rocks on average.


How do fine- grained igneous rocks from?

extrusive igneous rocks =/


What kind of igneous rocks for on earths surface?

Some do. These are called extrusive igneous rocks. However a large portion of igneous rocks form beneath the surface. These are intrusive igneous rocks.


Are granite rocks igneous rocks?

Yes. More exactly, intrusive igneous rocks.