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Physical Processes: Mrs. Walker 4 th Grade. Earth’s Surface:. The surface of the earth is made up of many different landforms. A landform is a natural shape and type of land on Earth’s surface. Landforms:. Mountains Hills Plateau Plains Valley. River Peninsula Canyon Glacier

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Physical Processes: Mrs. Walker 4 th Grade

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Physical processes mrs walker 4 th grade

Physical Processes:Mrs. Walker 4th Grade


Earth s surface

Earth’s Surface:

  • The surface of the earth is made up of many different landforms.

  • A landform is a natural shape and type of land on Earth’s surface.


Landforms

Landforms:

  • Mountains

  • Hills

  • Plateau

  • Plains

  • Valley

  • River

  • Peninsula

  • Canyon

  • Glacier

  • Volcano


Guided practice landform review

Guided Practice:Landform Review

Complete

Land and Water Formations

Worksheet.


Lets think

Lets Think!!!

  • Does Earth’s surface ever change?

  • What causes those changes?

  • Why? How? Examples?


Physical processes

Physical Processes:

  • Earth’s surface is constantly changing.

  • Different natural events, such as earthquakes and volcanoes, change the size and shape of landforms.

  • These events are known as physical processes.


Example mt saint helens 1980

Example: Mt. Saint Helens (1980)

Before After


Example earthquake tsunami in japan

Example: Earthquake/Tsunami in Japan

Before After


Lets review

Lets Review:

  • Earth’s surface is made up of many different types of landforms.

  • Physical processes, such as volcanos, earthquakes, flooding, and erosion shape and reshape earth’s surface.

Preview:

  • In our next lesson we will learn about a theory that explains why earthquakes and volcanos happen and how mountains are formed.


Plate tectonics

Plate Tectonics


Plate tectonics1

Plate Tectonics

The theory that Earth’s plates float on magma and slowly shift over time.


Plate

Plate

Definition:

A large sheet of rock that makes up Earth’s outer crust.


Mountain

Mountain

Definition: A natural rise of the earth with steep sides.

Mountains are formed when plates collide and the land buckles upwards.


Towel demonstration how are mountains formed

Towel Demonstration: How are mountains formed?


Earthquake

Earthquake

Definition: Occur when two of the earth’s plates move causing vibrations, or shaking to occur.


Physical processes mrs walker 4 th grade

Earth’s crust has many weak spots along plate edges. When plates rub against each other, Earth’s crust cracks and chips under the pressure. These cracks are called faults. When the crust moves along faults, great amounts of energy are released in the form of earthquakes. Earthquakes cause dramatic changes to the surface of the earth.


Physical processes mrs walker 4 th grade

Bam, Iran 12/26/2003


Volcano

Volcano

Definition:

An opening in the earth’s crust from which lava flows.


Physical processes mrs walker 4 th grade

Plates move in different directions. In some places, plates move apart and magma leaks out through cracks in the crust. In other places the plates push against each other. This pressure forces one plate to slide under the other. Overtime, tremendous pressure and heat build up. Molten rock gushes upward, exploding from beneath the ground. This is how volcanos are formed.


Plate tectonics volcano formation

Plate Tectonics: Volcano Formation


Physical processes mrs walker 4 th grade

Mt. St. Helens 5/18/1980


Plate tectonics video

Plate Tectonics Video


Plate tectonics2

Plate Tectonics

Mountains

Volcanos

Formed when 2

plates collide and

one plate moves

under another causing

magma to flow

upward and

erupt onto

Earth’s

surface.

Formed when plates collide and the land buckles upward.

Plates

Shift

Formed when 2 plates move and rub against each other causing vibrations,

or shaking

Earthquakes


Weathering and erosion

Weathering and Erosion


Weathering

Weathering

Definition: The wearing away of a surface through weather conditions, such as wind, rain or ice.


Erosion

Erosion

Definition: A process that breaks rocks down into tiny pieces and moves them to another location.


Erosion1

Erosion

  • Wind, rain, and ice cause erosion which slowly wear away Earth’s landforms.

  • Erosion helps create soil. (Tiny fragments of rock mix with decay mix with decayed animal and plant material to form soil.)

  • Over time, erosion can create new landforms.


Erosion2

Erosion:

The Grand Canyon was formed by erosion.


What s the difference

What’s the Difference?

  • Erosion involves running water, blowing wind, or moving ice that picks up and moves the particles to another location.

  • Weathering takes place as rocks are broken down into smaller pieces by the effects of weather. These pieces do not move to a new location, they simply break down, but remain next to one another.


Kwl chart

KWL Chart


Weathering and erosion video

Weathering and Erosion Video


Kwl chart1

KWL Chart


Physical processes mrs walker 4 th grade

Flooding

Definition:

An overflow of water onto land that is normally dry.

Flooding is often caused by heavy rains.


Physical processes mrs walker 4 th grade

Flooding

  • Overflowing rivers add nutrients to the surrounding soil.

  • If the Mississippi River were to flood, there would be an increase in fertile soil in the MS River Valley.


Check for understanding

Check for Understanding:

  • What creates new landforms?

    • Earthquakes

    • Volcanoes

    • Erosion

    • All of the Above


Check for understanding1

Check for Understanding:

  • Which of these does not cause weathering?

    • sunshine

    • wind

    • rain

    • ice


Check for understanding2

Check for Understanding:

  • Which United States landform was most likely caused by erosion?

    • The Great Lakes

    • The Mississippi River

    • The Rocky Mountains

    • The Grand Canyon


Check for understanding3

Check for Understanding:

  • Which physical process most likely formed the Great Smoky Mountains?

    • Flooding rivers

    • Erupting volcanoes

    • Plate tectonics

    • Wind erosion


Check for understanding4

Check for Understanding:

  • Which physical process most likely causes a river to overflow, adding nutrients to the local soil?

    • Heavy rains

    • Volcanic eruptions

    • Strong Winds

    • Melting Snow


Check for understanding5

Check for Understanding:

  • Which physical process most likely shaped the feature shown?

    • Plate tectonics

    • Volcanic eruptions

    • Water erosion

    • Coastal flooding


Check for understanding6

Check for Understanding:

  • Which physical process most likely created the mountain range shown on the map?

    • erosion

    • flooding

    • plate tectonics

    • volcanic eruptions


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