Social Studies

Lesson 1 Earth’s Landforms

Write a paragraph using the words below. You may not use your book.

landforms plate tectonics

continental drift

fault weathering

erosion deposition

floodplain delta

word splash

A floodplain is plain that has been flooded. A landform is land that is in

a different form. A delta is a narrow stream. Erosion is when a river

slowly wears down a landform.

Essential Question How do forces of the Earth cause

geographic changes?

With a partner, define the vocabulary. Must be completed for homework if not finished.

Landforms Plate Tectonics Continental Drift Fault Delta Weathering Erosion Deposition Floodplain

How do forces of the earth cause geographic changes?

Turn to page 20 in your textbook. Together we will read pages 20-23.

Video: Continents Adrift

Do Now- 10-5-11

Take out your fact sheet from the video we watched in class yesterday.

Get with a partner other than the person sitting next to you and exchange your facts with them.

A. Plate TectonicsThe theory that earth’s surface is divided into

several major, slow-moving plates or pieces. 1. Layers of the Earth- Like an Apple or a Peach

a. Crust- 10-25 Miles Thickb. Mantle 1,800 Miles Thick- hot rock like materialc. Outer Core- molten or melted d. Inner Core solid

2. Pangaeaa. The name given to Earth’s landmasses when it formed one

huge supercontinent.

3. Continental Drift Theorya. Forces within earth caused Pangaea to break apart into

continental plates and drift apart.

4. Mountain formation a. tectonic plates push togetherb. two plates collide and one moves up over the other

B. Earthquakes

1. Plates shake causing an earthquake

2. A fault is a break in Earth’s crust where movement occurs.

C. Volcanoes

1. Plates push against each other creating cracks in the crust onto Earth’s surface.

2. Heat within the mantle causes rock in the lower plate to melt. This molten rock is magma.

3. Lava is the name for magma that has escaped onto the surface.

Read page 23-24 Shaping Earth’s Surface silently.

D. WeatheringThe process of breaking up rocks into smaller pieces called

sediments.

..\..\..\Social Studies\Chapter 1\Chapter 1lfs\Chapter 1 Lesson 1\Weathering and Erosion pictures pp.ppt

..\..\..\Social Studies\Chapter 1\Weathering_and_Erosion.asf

D. WeatheringThe process of breaking up rocks into smaller pieces called sediments.

1. Water * Gravity2. Wind * Plants3. Temperature4. Erosion- process of moving

sediments.5. Deposition- process of dropping

sediments in a new location

Humans

Read Page 25 – People Change the Land

F:\Social Studies\Chapter 1\Humans and earth.asf

E. Humans

1. Build farms and cities2. reshape waterways 3. create new waterways (lakes etc)4. Build dams5. drain water and direct water to

areas of need. (irrigation systems)

Ticket Out the Door

Name three forces of the Earth that cause geographic changes. Explain how each force changes the earth.

Answer the Essential Question

How do forces of the earth cause geographic changes?

There are many forces that change what the

Earth looks like. (Explain how each one works.)

Do Now

Be prepared for your summarization activity.

Do Now

Take out your handout “Earth’s Landforms”

Discuss the ticket out the door response with a neighbor.