Bell work 9-2-11Bell work 9-2-11• 1. What is the name of the longitude line 1. What is the name of the longitude line

180*?180*?

• 2. What is the surface features of a place?2. What is the surface features of a place?

• a. topography b. Time Zones c. Prime a. topography b. Time Zones c. Prime Meridian d. I.D.LMeridian d. I.D.L

• 3. What is used to begin lines of longitude?3. What is used to begin lines of longitude?

• a. topography b. Time Zones c. Prime a. topography b. Time Zones c. Prime Meridian d. I.D.LMeridian d. I.D.L

Plate Plate TectonicsTectonics

Plate TectonicsPlate Tectonics

•Earth’s crust is divided into Earth’s crust is divided into huge sections called plates.huge sections called plates.

•These plates are constantly These plates are constantly moving. They move from 1-4 moving. They move from 1-4 inches each year.inches each year.

•Fault lines are found along Fault lines are found along plate boundaries.plate boundaries.

Earth is like a chocolate Earth is like a chocolate dipped Ice Cream Conedipped Ice Cream Cone

3 Types of Plate 3 Types of Plate MovementsMovements

•1. Away from each other1. Away from each other–Found underneath oceansFound underneath oceans

•2. Towards each other2. Towards each other

•3. Side by side3. Side by side

Plates move away from each Plates move away from each otherother

•1. Sea floor opens up1. Sea floor opens up

•2. Hot molten rock fills the 2. Hot molten rock fills the opening opening

•3. Builds up to form a mountain 3. Builds up to form a mountain chain called a Mid-Ocean Ridge.chain called a Mid-Ocean Ridge.

•4. Eventually forms Islands4. Eventually forms Islands

Islands forming in the Caribbean Islands forming in the Caribbean SeaSea

Plates move towards each Plates move towards each otherother

•SubductionSubduction – the heavy plate goes – the heavy plate goes under the lighter plate and pushes it under the lighter plate and pushes it up. up.

•This forms high mountains that are This forms high mountains that are often volcanic.often volcanic.

•An example of this is the Himalayan An example of this is the Himalayan MountainsMountains

Plates move side by Plates move side by sideside

The land crumples to form low The land crumples to form low mountains (often volcanic)mountains (often volcanic)

An example of this type of movement An example of this type of movement is the San Andreas fault in California.is the San Andreas fault in California.

It is also why Baja California is It is also why Baja California is separated from mainland Mexico. separated from mainland Mexico. (see page 588)(see page 588)