Canyons form after many years from this agent of erosion.
What are rivers?
100
Waves do this to the coastline that they break against.
What is eroding?
100
Rivers and streams carry eroded material and other debris called this.
What is sediment?
100
This is the main agent responsible for shaping the earth's surface.
What is water?
200
Which of the following would be true about a river over a long period of time?
a. grows larger
b. divides into multiple rivers
c. change the land by carving new paths
d. decrease in size
c. change the land by carving new paths
200
This is where beaches get most of their sand.
What is sediment produced by rivers?
200
Rivers moving back and forth across a flat valley floor produces this.
What is a floodplain?
200
Ice wedging is an example of this type of weathering.
What is physical weathering?
300
This is what happens when a river or stream exceeds the capacity of its channel.
What is a flood?
300
This is a reason why beaches and shorelines are constantly changing.
What are waves and currents?
300
The rate of this increases as the steepness of rivers increases.
What is erosion?
300
Lichens changing the composition of rock is an example of this.
What is chemical weathering?
400
Rivers flow fastest down this type of slope.
What is steep?
400
This is why sand on the East Coast might be different from sand on the West Coast.
What are different sources of sediment?
400
This is the structure you get when softer rock erodes underneath harder rock.
What is a waterfall?
400
Yosemite's U-shaped valley was carved out by one of these.
What is a glacier?
500
This is the part of a meander where erosion is greatest.
What is the outer curve?
500
These are the types of currents that move sediment parallel to the shoreline of a beach.
What are longshore currents?
500
This is the area where rivers meet lakes or the ocean.