Metamorphic rocksMs. Steele

formation

• What is a sedimentary rock?

• Pushing the paper towel together creates a bulge. What might this be in relation to the Earth?

• What happened after we added water?

Yummy rock time!

• Do NOT eat the candy until told to do so

• 1. Look at the cut side of the candy bar. Sketch the appearance of the cut side

• 2. Place a piece of wax paper underneath and above the candy.

• 3. Using your hands, flatten the candy bar

• 4. Reexamine the cut side of the candy bar and sketch it

Our results

• What did your candy look like before?

• What did your candy look like after you crushed it?

• What does the candy represent?

• Did your original sketch have layers?

• How does this activity describe the formation of metamorphic rocks?

• What would happen if we applied heat?

It’s getting hot in here!• Rocks undergo transformations

• Metamorphic=to change shape

• Meta=about itself

• Morph=to change shape

• Ic=about or pertaining to

• “About changing the shape of itself”

• If sedimentary and igneous rocks undergo high pressures and temperatures, they may be changed into metamorphic rocks

• Deep in the Earth

Metamorphic

• Contact Metamorphism• Heated by nearby magma

• Higher temperature rock composition change new rock with new minerals

metamorphic

• Regional Metamorphism• Pressure builds up in rocks

that is deep within the Earth

• Large pieces of Earth’s crust collide rock deformed and chemically changed by heat and pressure

foliated

• Foliated• Aligned grains of flat minerals

Gneiss is a foliated metamorphic rock that has a banded appearance and is made up of granular mineral grains.

It typically contains abundant quartz or feldspar minerals.

Non-foliated

• Non-Foliated• Mineral grains are not arranged in plains or

bands

Marble is a non-foliated metamorphic rock that is produced from the metamorphism of limestone.

It is composed primarily of calcium carbonate.

Matching card game

• Each group will receive one card

• First group will be told to read their card aloud

• Each card has an answer and a question

• Read the question aloud; a different group has the answer on their card. They will raise their hands, say the answer, and ask their question, etc.

Have a gneiss day!