Bell Work: 10/20/14Write the answer and explain why the answer you chose is

correct (justify your answer).

What type of rock is most likely formed by process 3?

What type of rock is most likely formed by process 3?

Grade Rock Cycle Worksheet

1. Sedimentary2. Igneous3. Sedimentary4. Igneous5. Metamorphic6. Sedimentary7. Metamorphic8. Metamorphic9. Sedimentary10.Igneous

Real-life application!What am I pointing to? What is the process called that

forms them?

Objectives

25. Metamorphic Rock Notes Identify the major processes that drive the rock

cycle (SPI 0707.7.3). How are metamorphic rocks formed? How are the composition, heat, and pressure related

to the texture of metamorphic rock? What is the difference between foliated and

nonfoliated metamorphic rocks?

Label a diagram that depicts the three different rock types (SPI 0707.7.2).

Metamorphic StarburstsGroup Discussion:

• Rip your Starburst in half and share it with someone in your group who has a different color Starburst.

• Stick the two pieces together and wrap them back up in your Starburst wrapper.

• Explain to your elbow partner how the individual pieces of starbursts stuck together are like sedimentary rock.

• What does the word “metamorphosis” mean?

• We will look at more questions towards the end of class…

Metamorphic Rocks: Rocks that Change

Metamorphic comes from the Greek words meta and morph. Meta means “change” and morph means “form”. So we get metamorphic meaning to change form.

Metamorphic Rock:Origins of MetamorphicRock

• Rocks can also go through a process called metamorphism, which means to ____________.

• ___________ _______ are rocks in which the structure, texture, or composition of the rocks have changed.

• All three types of rocks can go through metamorphism or can be changed by ______, _________, or a combination of both.

change form

rocksMetamorphic

heatpressure

Metamorphic Rock:Two Kinds of Metamorphism

• ___________ ________________occurs when magma intrudes or forces its way into existing rock. The heat of the magma bakes the surrounding rocks causing them to change.

• ___________ ________________ by contrast takes place over large areas deep within Earth’s crust. Regional metamorphism is associated with mountain building.

Contact metamorphism

Regional metamorphism

Metamorphic RockTextures of Metamorphic Rocks

Textures of metamorphic rocks

depend on composition of the

rock and the amount of heat and pressure that is applied to the rock.

• __________ = mineral grains arranged in bands or planes (straight lines). Look at pg. 379.

• ____________ = mineral grains are not arranged in bands or planes

• Examples of metamorphic rocks:

Foliated

Nonfoliated

Marble

Gneiss

Rock Classification• In the T-chart on your notes, lets categorize

the rock samples as Foliated Metamorphic Rocks or Nonfoliated Metamorphic Rocks.

• Pay careful attention to how the mineral grains are arranged in the rocks (bands or not).

• Write the names of the rocks on the T-chart under the categories.

Question Challenge:

How could #14, Amphibolite, be categorized both foliated and nonfoliated?

Real World Uses of Metamorphic Rocks

Marble

Slate

Metamorphic Starbursts

Group Discussion:

• Describe how your starburst metamorphoses when heat and pressure are applied to them.

• How is this starburst activity related to metamorphic rock?

3-2-1 Reflection

3 things I learned…

2 questions I have…

1 way I can relate this lesson to my daily life…