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Lesson 8:
The Rock Cycle
The Rock Cycle is the process
that changes rocks into
different types of rocks.
Forces such as volcanic activity, weathering,
and movement of Earth’s tectonic plates
break down old rock and form new.
The rock cycle is an ongoing
process of forming new rocks
from Earth’s existing rock.
Discovery Education Video:
The Rock Cycle
This video explains how rocks change over
time and describes the three types of rocks:
igneous, sedimentary, and metamorphic.
Discovery Education Video:
The Rock Cycle
Describes how one kind of rock can change
from one to another and tells the story of
different rocks that they found.