The compound that exerts a major control on the pH of seawater is ________.
A. PO43-
B. N2
C. CO2
D. NH4+
E. NO3-
Answer: C
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How does the pace of urbanization in developing countries contribute to the food problem?
A) People moving to cities cause disruptions in the transportation network. B) Hundreds of millions of people who lived in rural areas and produced food now live in cities. C) Expanding urban heat islands cause changes to the local climates. D) The most productive land is paved over to develop middle-class suburbs. E) People who live in cities adopt western-style diets that are heavy on meat consumption.
The tiniest channels are called ____________________
Fill in the blank(s) with correct word
The heat that is transferred from a hot object to your hand is known as
A. kinetic energy. B. latent heat. C. entropy. D. sensible heat.
The ________ is the thinnest layer of the earth
A) outer core B) inner core C) crust D) mantle