Name three things that can cause changes to earth's surface.
What are wind, rain, snow, growing plants, pressure, chemicals, volcanos and earthquakes.
100
When fields are plowed across slopes rather than up and down this is called?
What is contour farming.
100
The biggest cause of erosion is?
What is flowing water.
100
Natural features on Earth's surface are called?
What are landforms.
100
What causes gradual changes in a statue exposed to acid rain?
What is chemical weathering.
200
The breaking down of rocks is called?
What is weathering.
200
The carrying away of weathered rock is called?
What is erosion.
200
The transport of weathered rock is called?
What is erosion.
200
When land becomes flatter, a river runs a bit_______ and becomes ________.
What are slower and wider.
200
What sizes of sand and rock will the wind carry?
What are tiny pieces of sand and rock.
300
Physical weathering causes rocks to simply change...
What is size and shape.
300
What is a method called that is used to save soil and slow down erosion?
What is conservation.
300
What is the area of land called that forms at the mouth of a river?
What is a delta.
300
What are long, narrow strips of land that protect our coast from erosion?
What are barrier islands.
300
Why do sand dunes have different shapes?
What is wind direction--this can cause the sand dunes to change shape.
400
The wearing away of rock by blowing sand is called?
What is wind abrasion.
400
When you plant rows of food crops next to rows of plants that hold the soil--this is called?
What is strip farming.
400
What is a large, thick sheet of ice called?
What is a glacier.
400
Glaciers creep slowly over land and form_____?
What is a U-Shaped valley.
400
what is the term for decayed plant or animal material?
What is humus.
500
A rock can break down when minerals in the rock are changed chemically. What 3 things can react with the minerals in rock and cause chemical weathering?
What are oxygen, acids and carbon dioxide.
500
The dropping off of weathered rock is called?
What is deposition.
500
What do you call a hill that is formed by blown sand?
What is a sand dune.
500
What do you call a deep narrow valley with steep sides?