Continuing the Rock Cycle

Continuing the Rock Cycle

Bell Ringer

• Remember, variation is GOOD because it gives a species the ability to survive in many different environments.

• The wolf with white fur may survive best in places where it snows, but the wolf with darker fur may survive best in dark-wooded areas.

Bell Ringer

• Remember, MITOSIS has two daughter cells that are identical to the parent cell.

Bell Ringer

• Remember, TT and Tt give the dominant trait

• tt is the only genotype that gives the recessive trait.

• A person can't have both the dominant and recessive trait!

Announcements

• Homework due on Thursday

• Make sure that you are participating in class! I'll be reaching out to you/your guardian if not (because I care about your grade and your education!)

Agenda

• Bell Ringer

• Announcements

• Lesson - Rock Cycle / Fossils

• Independent Practice

• Exit Ticket

Objectives

• Review: what are the 3 types of rocks? What processes are involved in the rock cycle?

• What is a fossil?

• What type of rocks are fossils normally present in?

Review from Yesterday

• There are 3 categories of rocks...

• Igneous: formed when magma/lava crystallizes

• Sedimentary: formed from particles/sediment that has been compacted

• Metamorphic: formed when another type of rock come under high temperature/pressure

Review from Yesterday

• The rock cycle describes how rocks can change from one type to another, as a result of natural processes.

• These processes include: weathering, erosion, deposition, compaction/cementation, metamorphism, and melting/crystallization

Multiple Choice

Which type of rock is formed as a result of weathering/erosion?

• Sedimentary

• Igneous

• Metamorphic

Multiple Choice

Which type of rock is formed when magma or lava cools?

• Igneous

• Sedimentary

• Metamorphic

Multiple Choice

Which type of rock is formed when another type is exposed to heat and pressure?

• Igneous

• Sedimentary

• Metamorphic

Multiple Choice

When metamorphic rocks melt, they form _______.

• water

• air

• salt

• magma

Moving on to... Fossils!

Fossils

• Fossils are the preserved remains of organisms that lived long ago.

• There are different types of fossils: trace fossils, body fossils, mold and cast fossils...we'll be going into more detail on the different types next week.

How do body fossils form?

• 1. The animal dies.

• 2. Soft parts of the animal's body, including skin and muscles, start to rot away. Scavengers may come and eat some of the remains.

• 3. Before the body disappears completely, it is buried by sediment - usually mud, sand or silt. Often at this point only the bones and teeth remain.

Formation of Fossils

• 4. Many more layers of sediment build up on top. This puts a lot of weight and pressure onto the layers below, squashing them. Eventually, they turn into sedimentary rock.

• 5. While this is happening, water seeps into the bones and teeth, turning them to rock as it leaves behind minerals.

  This process can take thousands or even millions of years.

Multiple Choice

What type of creature is more likely to fossilize?

• A hard-bodied creature

• A soft-bodied creature

Fossils

• Organisms with hard, bony parts—such as bones, shells, and teeth— have a higher chance of becoming fossils than soft-bodied organisms. 

Multiple Choice

Which type of rock would most likely contain a body fossil?

• metamorphic rock

• sedimentary rock

• igneous rock

• molten rock

Location of Fossils

• Fossils are most commonly found in sedimentary rock.

Multiple Choice

A rock formation in a land area contains fossils. Over time, tremendous heat and pressure change the formation to produce a harder rock formation without fossils. Which change in rock type has occurred in this land area?

• Igneous rock has turned into sedimentary rock.

• Igneous rock has turned into metamorphic rock.

• Sedimentary rock has turned into igneous rock.

• Sedimentary rock has turned into metamorphic rock.

Any questions so far?

Independent Webquest

• Let's pull everything together!

• You'll be working on a Google Form for the rest of class.

Independent Work Expectations

• Make sure that you are working and staying on task - I need this by the end of class!

• When you are finished, you can complete your exit ticket then you are good to go!

Exit Ticket

• Please complete your exit ticket in Canvas

• When you are finished, you are free to go.

• Have a great day!