Organic material in oil mostly comes from
A. plants on land.
B. hydrogen rising from Earth's mantle.
C. calcite that has been heated to a high-enough temperature.
D. marine organisms.
Answer: D
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Consider the following molecules. What is the relationship between the degree to which the molecule is oxidized and its polarity?
A. Only acetaldehyde and acetic acid are oxidized and polar because they contain a double-bonded carbon-oxygen bond, C=O. Of the two, acetaldehyde is more polar. B. The greater the degree of oxidation, the less polar the molecule. Therefore, ethane is both the most oxidized and the least polar. C. The greater the degree of oxidation, the more polar the molecule. Therefore, acetic acid is both the most oxidized and the most polar. D. There is no correlation between degree to which a molecule is oxidized and its polarity.
One of the letters in the abbreviation CEC stands for ________
A) clump B) cation C) electrical D) charges E) colloid
Just as people read and interpret books differently, they can read and interpret landscapes differently
Indicate whether this statement is true or false.
Arroyos are a type of:
a. stabilized sand dune b. playa c. ephemeral stream channel d. wind-eroded rock