Historically, people lived in crowded cities because they had to be within walking distance of shops and places of employment

Indicate whether the statement is true or false.


Answer: TRUE

Environmental & Atmospheric Sciences

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The part of the atmosphere that contains weather and supports life ________

A) extends about as high above the Earth as the distance from Earth's surface to its center B) is much shorter than the distance from Earth's surface to its center C) is the hottest part of the atmosphere D) consists largely of oxygen E) consists of a chemical compound called "air"

Environmental & Atmospheric Sciences

Researchers have drilled all the way to the mantle

a. True b. False

Environmental & Atmospheric Sciences

What is the source of energy inside the Sun?

A. Nuclear fusion B. Radioactive decay C. Nuclear fission D. None of these choices are correct

Environmental & Atmospheric Sciences

When blue food coloring is stirred into water, the result is a

A. pure liquid. B. homogeneous mixture called a solution. C. homogeneous mixture called a suspension. D. heterogeneous mixture called a suspension. E. heterogeneous mixture called a solution.

Environmental & Atmospheric Sciences