During the Pleistocene glaciation, temperatures fluctuated by as much as 10o C

a. True
b. False


True

Environmental & Atmospheric Sciences

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Atoms of nonmetallic elements form covalent bonds, but they can also form ionic bonds. How is this possible?

A. An ionic bond results when a nonmetallic elements gains an electron from a metallic element. B. This happens when one of the bonded nonmetallic elements has a strong electronegativity. C. It happens when one of the nonmetallic elements loses an electron to become a positive ion. D. An ionic bond results when a nonmetallic elements loses an electron to a metallic element.

Environmental & Atmospheric Sciences

A blue star is ________ our Sun

A) hotter and smaller than B) colder and larger than C) colder and smaller than D) hotter and larger than E) approximately the same temperature and size as

Environmental & Atmospheric Sciences

Earth’s early atmosphere was very rich in oxygen (O2). Indicate whether the statement is true or false

Environmental & Atmospheric Sciences

The Hazaras are Shi'ite Muslims

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences