Rocks Chapter 2, Lesson 2
Rocks
• A rock is a natural, solid mixture of particles mainly made of individual mineral crystals, broken bits of minerals, or fragments of rock.
Igneous Rock
• Magma deep in Earth cools slow– large crystals
• Lava on Earth’s surface cools fast– small crystals
Metamorphic Rock
• Formed when solid rocks are squeezed (pressure) or heated. – New rock forms from old rock– Foliation- parallel bands of minerals form.
Sedimentary Rocks
• Formed when sediment (small pieces of rock) is compressed by the weight of the material above them.
Rock Cycle
Homework
• Chapter Content Mastery: Rocks and Minerals handout