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7th Grade Rocks

What is the difference between rocks and minerals? The difference between the two is that minerals are considered to be the building blocks of rocks and rocks can be a combination of as many as six types of minerals.
How many types of rocks make up the Earth's crust? Three types of rocks make up the Earth's crust.
What are the names of the 3 types of rocks? The names are igneous, metamorphic, and sedimentary rocks.
How are igneous rocks formed? Igneous rocks form when molten magma cools and solidifies.
What is another name for igneous rocks? Sometimes they're called "rocks of fire."
What is the difference between two types of igneous rocks? The difference is extrusive types form when molten rock comes to the surface and cools quickly as opposed to intrusive rocks, which solidified underground, cooling slowly to produce course-grained rocks.
How are sedimentary rocks made? Sedimentary rocks are formed when sediment (bits of rock plus materials such as shells and sand) get packed together.
How are metamorphic rocks made? Metamorphic rocks are igneous or sedimentary rocks that have been transformed by heat, pressure, or both.
What does the word "metamorphosis" mean? It means to "change." Examples: Schist , slate, marble.
Created by: rakhi.kanwar



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