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Discover the characteristics and classification of igneous, sedimentary, and metamorphic rocks. Learn about their formations, colors, and unique features. Explore where to find these rocks and their significance. Unveil the mysteries of rocks’ composition and how they play a crucial role in the Earth's structure.
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Aim: What is a mineral? • Do Now: • 1. What is a mineral? • 2. State at least two characteristics of a mineral.
01/02/2018 AIM: What are three types of rock? • Do now: Take out your ROCK NOTE. What are three types of rocks? How do we classify rocks?
01/02/2018 AIM: What are three types of rock? • Do now: Everybody needs rocks! • Where do we find rocks? What are rocks used for? Do you think rocks are important? Why or why not? • What is the biggest rock you have seen? What is the smallest rock you have seen?
ROCK • A rock is: • A solid • Naturally occurring • Is made up of minerals or mineral like matter.
CompositionSome rocks are composed of just one mineral. • Most rocks are a solid mixture of several minerals.
Rocks are classified by how they are formed. • There are three basic groups, igneous, sedimentary, and metamorphic.
01/03/2018 AIM: What are three types of rock? • Do now: • 1. What are three types of rocks? • 2. How do we classify rocks? • 3. Describe at least two properties of rocks.
Igneous Rock • Igneous rocks are formed from cooling magma. They are made of large or small crystals that are spread evenly throughout the rock. • Color: light or dark, but usually light gray to black. There may also be pink, yellow, or black crystals in large grained rocks. • Characteristics: Bubbles sometimes form if the rock cools very quickly.
Where can we find Igneous rock? • Igneous rocks are found at the base of a volcano.
Do Now: • Q: How is a igneous rock formed? Where does it come from?
Sedimentary Rock • Sedimentary rocks are pressed or cemented together from the grains that weather from other rocks. • Color: any color with very fine or large sandy grains. • Characteristics: They often have very clear layers that are easy to break apart. Fossils may be embedded in the rock.
Where can we find Sedimentary rock? • In many environments including oceans, rivers and deserts.
Do now: • How is a sedimentary rock formed? • What is a characteristic of a sedimentary rock? • Sometimes you can find this in a sedimentary rock. This tells you something about the past. What is this?
Metamorphic Rock • Metamorphic rocks are formed from other rocks when they are put under great pressure and heat. • Color: from pure white to solid black. • Characteristics: Often they have fine grains of mica that flake off. They may also have layers of different minerals that are wavy like ribbons through the rock. They are usually very hard and the layers do not break apart easily.
Where can we find Metamorphic rock? • In mountain ranges where high pressures squeezed the rocks together • Himalayas, Alps, and the Rocky Mountains.
Do now: Take out your homework and notes from yesterday. Answer the questions! • 1. What is a rock cycle? Does every rock go through the rock cycle? • 2. How does an igneous rock become a metamorphic rock? • 3. How does a sedimentary rock become an igneous rock?
What type of rock might contain evidence of past life? • What type of rock contains large crystals? • What type of rock might contain holes from gases? • What type of rock has visible FLAT layers? • What type of rock changes by heat/pressure? • What type of rock contains rounded grains? • What type of rock has ribbon like bonding/layers?
