Exam 3: Landforms

Over the last 20 years, the rate of sea level rise appears to have increased to about 3 mm per year.

Channel beds and banks are made up of materials transported by streams, temporarily deposited, and then eroded again as streams take ________ courses.

Abandonment of less productive lands and adoption of soil conservation technologies since the 1930s have significantly reduced erosion on U.S. farms.

These are rivers of ice that flow from places where snow accumulates yearly to warmer places where they melt.

________ follow intense rains, because material with a high water content is weaker and less able to resist the force of gravity.

What is surface erosion and what role does it play in moving weathered materials?

A stream gathers water from an area called its ________.

Soil Creep is the most common form of mass movement.

Globally, the three largest earthquakes took place in Japan in 1960, San Francisco in 1964, and Chile in 2004.

________ weathering occurs when there is a change in the minerals that compose rocks when they are exposed to air and water.

Explain the ways in which weathered materials are moved.

Most of the water flowing into streams is supplied not by rainfall directly, but by groundwater.

Much of the Northern Hemisphere was covered in ice 20,000 years ago.

Explosive volcanoes that cause death and destruction are more likely to be composite cone volcanoes.

By continually eroding and depositing material in channels and adjacent low-lying surfaces called floodplains, streams tend toward a stable condition, known as its catchment area.

It is generally believed that vast areas of the continental crust known as shields have not been significantly changed for millions of years.

Distinguish between chemical and mechanical weathering.

In mass movement, rocks roll, slide, or freefall downhill under the steady pull of gravity.

A boundary where plates are spreading apart is a ________.

The average thickness of the Earth's crust is about ________ miles.