Erosion
Sponsored Links
This presentation is the property of its rightful owner.
1 / 51

2 pt PowerPoint PPT Presentation


  • 52 Views
  • Uploaded on
  • Presentation posted in: General

Erosion. Potpourri. Chemical Weathering. Mechanical Weathering. Deposition. 1pt. 1 pt. 1 pt. 1pt. 1 pt. 2 pt. 2 pt. 2pt. 2pt. 2 pt. 3 pt. 3 pt. 3 pt. 3 pt. 3 pt. 4 pt. 4 pt. 4pt. 4 pt. 4pt. 5pt. 5 pt. 5 pt. 5 pt. 5 pt. True or false…

Download Presentation

2 pt

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Erosion

Potpourri

Chemical

Weathering

Mechanical

Weathering

Deposition

1pt

1 pt

1 pt

1pt

1 pt

2 pt

2 pt

2pt

2pt

2 pt

3 pt

3 pt

3 pt

3 pt

3 pt

4 pt

4 pt

4pt

4 pt

4pt

5pt

5 pt

5 pt

5 pt

5 pt


True or false…

Erosion occurs when rocks are not moving…


False


What can be moved because of erosion?


Rocks, sediment, and Earth materials


The formation of sand dunes is the result of —


Deposition


The rich topsoil of the prairie in the picture shown makes this

ecosystem suitable for the growth of a variety of grasses. All of

the following processes contribute to the formation of the topsoil

in the prairie except —

A weathering of rocks

B ocean waves

C deposition of weathered material

D decomposition of living things


ocean waves


_______is the most important erosional agent and

erodes most often in streams or rivers.


Wateris the most important erosional agent and

erodes most often in streams or rivers.


A hurricane forms over the ocean and hits the Texas coast and travels inland. What is the most likely effect of this event?

A More species of animal will inhabit the coast

B The shape and size of beaches will be changed

C The affected area will be less vulnerable to future natural disasters

D Native plants will never inhabit the area again


B The shape and size of

beaches will be changed


When the scooter hits a rock, the rider tends to fly forward because –

A objects at rest tend to stay at rest

B the scooter is subjected to a balanced force

C a force opposes the motion of the scooter but not the rider

D unbalanced forces cause objects to move at a constant speed


C. a force opposes the motion of

the scooter but not the rider


Which of the following is a force

that can oppose or change motion?

A.gravity

B.air resistance

C.friction

D.all of the above


D.all of the above


Force

  • The diagram above illustrates a movable pulley. This pulley gives a mechanical advantage by -

    • A reducing the force required to lift the load.

    • B changing the force direction

    • C requiring the force to be greater than the load

    • D requiring the force to move less distance than the load

Load


  • A. reducing the force required

  • to lift the load.


The picture shows a simple fixed pulley being used to lift a heavy box.

Which of these does the pulley change?


C. The direction of force required to move the box


Chemical weathering happens quickly in

______, _______environments because

water is needed for the chemical reactions.


warm, moist


In chemical weathering, a rock is broken

down by ______ ______that change its

mineral composition and physical

and chemical properties


chemical reactions


True of False:

Water can chemically weather rocks by

dissolving rocks.


True


True of False:

Living organisms such as Lichens do not chemically weather rocks.


False


True of False:

Rust is a form of chemical weathering


True


Mechanical weathering:

__________ breaks rocks down into smaller pieces


physically


True or False:

Weathering happens to rocks that are moving.


False


Explain how this is an example of weathering?


The tree roots are growing into the rock prying it into smaller pieces


How does freezing and thawing cause mechanical weathering?


When water freezes, it expands causing the cracks go grow


What is abrasion?


Abrasion is mechanical weathering in which rocks rub against each other wearing them down


What is it called when a glacier picks up a rock, or sediments off of the ground?


Plucking


How can wind be a cause of erosion?


Wind can blow sediment (dirt) from one place to another


What happens to rocks and sediment that are plucked by glaciers whenever the glacier melts?


The rocks and sediment are deposited

in a new location.


Describe how waves in the ocean can cause erosion.


Waves can cause beaches and coastlines to be reformed time after time


What force causes rock slides and

mud flows?


Gravity!


  • Login