1. What is a rock?

2. A rock is a naturally occurring solid mixture of one or more minerals or organic matter.

3. Processes that shape Earth also influence the type of rock found in certain areas of Earth’s crust.
These processes include:
Weathering: water, wind, and ice break down rock
Erosion: The process in which water, wind, ice, or gravity transports soil and sediment from one location to another.
Deposition: The process in which material is laid down.
Uplift: The movement within Earth that causes rocks inside Earth to be moved to Earth’s surface.

4. These processes create the rock cycle.
The rock cycle is a series of processes on the surface and inside Earth that slowly changes rocks from one kind to another.

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6. The rock cycle can take millions of years to complete
The rock cycle can take millions of years to complete. Rocks can change to any type of rock depending on the forces that act upon it.
Rocks are classified according to Their color, origin, composition (the minerals or other materials which make up the rock) and texture ( the size, shapes and positions of the rock’s grains).

7. Key Points
A rock is a naturally occurring solid mixture of one or more minerals or organic matter.
The series of processes on and beneath Earth’s surface that change rocks from one type to another is called the rock cycle.
Rocks are classified according to their color, texture, mineral compositio, and origin.