List of rock types

High school (ages 12+)
Environment & Earth

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/list-of-rock-types

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the primary rock classifications?Igneous, sedimentary, and metamorphic rocks, defined by their formation processes
2. What is the igneous rock textures?Coarse-grained (intrusive, slow cooling) vs. fine-grained or glassy (extrusive, rapid cooling)
3. What are the three main types of rocks?Rocks are mainly grouped into igneous, sedimentary, and metamorphic types.
4. How do igneous rocks form?They form when molten rock cools and solidifies, either underground as magma or on the surface as lava.

Lithification: The process by which loose sediment is transformed into solid rock.
Foliation: A planar arrangement of structural or mineralogical features in metamorphic rocks.
Stratigraphy: The study of rock layers (strata) and layering (stratification).