John Wesley Powell Put Forward the Idea of Base Level,which

question 15

Multiple Choice

John Wesley Powell put forward the idea of base level,which refers to

• A)an imagined surface that extends inland from sea level,and is inclined gently upward.
• B)a level above which a stream cannot erode its valley.
• C)an evolutionary cycle of landscape development.
• D)flat plateaus.
• E)the top surface of a delta.

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Definitions:

Independent Variable

In an experiment or study, the variable that is manipulated to observe its effect on the dependent variable.

Dependent Variable

A variable in an experiment or model that is expected to change in response to changes in another variable, known as the independent variable.

Price

The cost needed to acquire a product or service.

Hart-Celler Act

1965 law that eliminated the national origins quota system for immigration established by laws in 1921 and 1924; led to radical change in the origins of immigrants to the United States, with Asians and Latin Americans outnumbering Europeans.