Automobiles and light trucks account for ________ of U.S. oil consumption.

A. 10 percent
B. 20 percent
C. 60 percent
D. 40 percent


Answer: D

Environmental & Atmospheric Sciences

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A(n) ____ is a test involving manipulations made on conditions of a particular observation

A) hypothesis B) experiment C) theory D) scientific method

Environmental & Atmospheric Sciences

The coral reef is among the most endangered biological communities.

Answer the following statement true (T) or false (F)

Environmental & Atmospheric Sciences

Geochemical studies of rocks show that earth is approximately ________ years old

A) 500 million B) 6 thousand C) 30 billion D) 4.56 billion

Environmental & Atmospheric Sciences

What is the approximate pKa of a thiol?

A) 5 B) 7 C) 10 D) 14

Environmental & Atmospheric Sciences