Column 1
Physical features on Earth's surface
What are landforms?
the process of breaking rock into silt, sand, clay, and other tiny pieces
What is weathering?
tiny pieces of silt, sand, and clay
What is sediment?
the process of moving sediment from one place to another
What is erosion?
the process of dropping, or depositing, sediment in a new location
What is deposition?
Wind erosion can also blow sand into large mounds called these.
What are dunes?
Thick sheets of ice, formed in areas where more snow falls during the winter than melts during the summer
What are glaciers?
These types of glaciers are ice sheets that cover large areas of Earth
What are continential glaciers?
These types of glaciers are found in high mountain valleys
What are valley glaciers?
the downhill movement of rock and soil because of gravity
What is mass movement?
the chief agent of erosion
What is water?
Most rivers deposit sediment in flat areas along their banks called this.
What are flood plains?
Some rivers deposit sediment in broad areas at their mouths called this.
What are deltas?
These are dangerous places for people to live because of periodic flooding
What are flood plains?
The largest delta in the world is this one.
What is the Mississippi River Delta?
sediment from weathered cliffs is eroded by waves and deposited as new sand on this landform
What are beaches?
This type of mass movement moves dry soil.
What is a landslide?
They help protect the land behind them during storms
What are beach dunes?
This type of mass movement moves wet soil.
What is a mudslide?
This type of mass movement occurs VERY S L O W L Y.
What is creep?
These form after rock under the surface has dissolved or become weak
What are sinkholes?
When the glaciers melted, they left behind at their lower ends long ridges of soil and rock, called this
Rain seeping into the ground combines with carbon dioxide from the air to form a weak acid called this.
What is carbonic acid?
Sinkholes often appear in these types of areas.
What is limestone rock?
New islands can be formed by this.
What are volcanic eruptions?