2.Igneous Rocks are classified by their origin,texture,and mineral composition.

3.Metamorphic rock is formed under extreme pressure combined with heat over time.

4.Metamorphic rock can originate not only as igneous and sedimentary rock but also other types of metamorphic rock.

5.Marble is a type of metamorphic rock that originates from limestone.

1.Forms when a rock breaks down because of heat,pressure,and chemical reactions.

Picture:

Picture:

2.Sediment is small, solid pieces of material that come from rocks or living things.

1.Sedimentary rocks form through the deposition, compaction, and cementation of sediments over millions of years.

4. Organic rock forms where the remains of plants and animals are deposited in thick layers.

5.When minerals that are dissolved in a solu­tion crystallize, chemical rock forms.

Picture

3. A Clastic rock is a sedimentary rock that forms when rock fragments are squeezed together.