Rocks

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Types of Rocks

Discuss with your partners things you already know about rocks!

• When you are done discussing, move on through the powerpoint!

Rocks are divided into 3 types…

• IGNEOUS

• SEDIMENTARY

• METAMORPHIC

Add to your notes:

Sedimentary MetamorphicIgneous

Types of Rocks

Igneous Rocks

Other Key Facts Information:• The texture depends on how fast the rock cools

– Quickly cools- smooth texture– Slowly cools- bumpy or rough texture

• They are very hard and can have crystals• Examples are basalt and granite

Definition Information:•Igneous literally means “From Fire”

•Considered “Parent Rock” as all other rocks form from igneous rocks

•These rocks were made from cooled magma or lava

•Intrusive igneous= from magma

•Extrusive igneous = from lava

Discuss….

….the differences between the igneous rocks made from magma and the igneous rocks made from lava.

What are they called?Which will cool faster?Where will they form? Etc!

Sedimentary Rocks

Other Key Facts Information:• Types of sediment: sand, shells,

pebbles, bits of rock, minerals, organic (from living things) matter, or fossils

• They are soft and crumbly, made of layers

• Examples are sandstone, limestone and shale

Definition Information:

These rocks are made from layers of sediment (weathered rock) that has been cemented together.

Discuss…

…how would the type of sediment affect the appearance of the sedimentary rock they create?

Colors?Texture?Location?Etc!

Metamorphic Rocks

Definition Information:• Metamorphic rocks are formed

when an existing igneous or sedimentary rock comes under extreme heat and pressure (“squeezing”).

• These rocks have literally “Metamorphosed” (changed).

– That means they started out as one thing and became something completely new and different

Metamorphic Rocks

Other Key Facts Information:

*Two groups based on internal structure:

Foliate- bands or zones of same material

Non-foliated- no visible bands or zones

*They are formed underneath the surface of earth*Examples are marble and slate

Non-foliated

Foliated

Discuss….

….How are metamorphic and sedimentary rocks similar? Different?

The Rock CycleClick here for an interactive rock cycle diagram

Complete your rock cycle notesHover over the terms & record them on your rock notesClick on the animations & take notes in the margins

Test Your Knowledge

Click here to test your knowledge of how rocks change

Turn Your Paper Over!!!

• Don’t go to the next slide until everyone is ready!

Now, try to complete this rock cycle web without looking at your notes!

Compare Your Answers! A Rock Cycle Web!