DO NOW

• 1) How do the layers of the Earth affect us?• 2) What is a cycle• 3) What is a cycle you can think of? Why is it a

cycle• 4) What do you know about rocks?

H O W O N E R O C K C H A N G E S I N T O A N O T H E R

THE ROCK CYCLE

AGENDA

• DO NOW• YET• Objective• TET• Lecture on Types of Rocks• Weathering• Erosion• Exit Ticket

YET

• 1) Name the layers of the Earth in the correct order from outer to inner• 2) What are convection currents? Why do they

occur?• 3) How do convection affect the Earth?

OBJECTIVE

• SWBAT explain the rock cycle and what powers it• SWBAT explain the different parts of the rock

cycle; weathering & erosion specifically

TODAY’S EXIT TICKET

1. How do we classify rocks as either igneous, sedimentary, or metamorphic?

2. In which type of rock does bedding normally occur? 3. Explain what bedding is.4. Metamorphic rocks are formed through high levels of heat

deep within the ground. Where does this heat come from?5. Imagine that you are near a volcano. Which type of rock

can you expect to find? Why?6. John has a metamorphic rock and Aaron wants a

sedimentary rock. What must happen to John’s metamorphic rock before it becomes a sedimentary rock?

ROCKS

• A rock is a group of minerals bound together• The three types of rock are Igneous, Sedimentary,

and Metamorphic Rock

ROCK CYCLE*

• The Rock cycle demonstrates the relationships among the 3 major rock groups (Sedimentary, Igneous, and Metamorphic)• It is powered by:• the internal heat of the Earth • the energy from the SUN

• It involves processes on the Earth’s surface as well as the Earth’s interior

IGNEOUS ROCK

Igneous- Comes from the Latin word ‘ignis’ meaning fire

Formation When magma hardens or lava cools.

Destruction Weathering and Erosion - the removal of rock

due to wind, water, ice or gravity.

IGNEOUS ROCKS

Hints that you are seeing an igneous rock:

1. Bubbles2. Glassy appearance3. Big grains of minerals

BUBBLES

GLASSY APPEARANCE

BIG GRAINS

SEDIMENTARY ROCK

Sedimentary- Comes from the Latin word ‘sedimentum’ meaning settling.

FormationSediment from weathering and erosion is deposited and then rock is formed from cementation.

Destruction Under high pressure and heat

SEDIMENTARY ROCKS

Hints that you are seeing a sedimentary rock:

1. Flat layers2. Mix of particle size3. Sedimentary rocks create a process

called BEDDING. BEDDING occurs when large amounts of sediment are deposited and turn into large rock formations

FLAT LAYERS

MIX OF PARTICLE SIZE

METAMORPHIC ROCK

Metamorphic- Comes from the Greek word ‘meta’ meaning to changeMetamorphic rocks change due to heat & pressure

Formation Rocks are changed by heat or pressure. This is

often when how magma is introduced to a body of rock.

Destruction Metamorphic rocks are destroyed when they are

heated up as magma.

METAMORPHIC ROCKS

Hints that you are seeing a metamorphic rock:

1. Bending layers2. Squished Grains3. Layers in metamorphic rock are

called FOLIATION

BENDING LAYERS

SQUISHED GRAINS

TEST YOURSELF

• try to identify the correct type of rock for each of the following pictures

SAMPLE 1

SAMPLE 2

SAMPLE 3

ANSWERS

1. Sedimentary (mix of particle size)2. Igneous (bubbles)3. Metamorphic (bending layers)

How did you do???

WHAT

TYPE OF

ROCK?

This rock was formed by the compaction and cementation of sediment

WHATTYPE

OF ROCK?

WHAT

•This rock was formed by melting and cooling of magma.

TYPE OF ROCK?

WHAT

•This rock was formed by heat and pressure deep within the Earth.

TYPE OF ROCK?

WHATTYPE OF ROCK?

WHATTYPE OF ROCK?

WHAT

•This type of rock is found near volcanos.

TYPE OF ROCK?

WHAT

•This type of rock is found deep within the Earth.

TYPE OF ROCK?

WHAT

•This type of rock is much like our ice cream, it starts as a liquid and then cools into a solid.

TYPE OF ROCK?

WHAT

•This type of rock is much like our sandwich. It is made of many layers stacked on top of each other.

TYPE OF ROCK?

WHAT

•This type of rock is like our cake. It is baked but not melted.

TYPE OF ROCK?

WHAT

•Conglomerate is an example of this type of rock.

TYPE OF ROCK?

WHAT

•This type of rock can be intrusive or extrusive.

TYPE OF ROCK?

WHAT

•This type of rock can be clastic or chemical.

TYPE OF ROCK?

EXIT TICKET

1. How do we classify rocks as either igneous, sedimentary, or metamorphic?

2. In which type of rock does bedding normally occur? 3. Explain what bedding is.4. Metamorphic rocks are formed through high levels of heat

deep within the ground. Where does this heat come from?5. Imagine that you are near a volcano. Which type of rock

can you expect to find? Why?6. John has a metamorphic rock and Aaron wants a

sedimentary rock. What must happen to John’s metamorphic rock before it becomes a sedimentary rock?