During the Pleistocene glaciation, temperatures fluctuated by as much as 10o C
a. True
b. False
True
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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.
Earth’s early atmosphere was very rich in oxygen (O2). Indicate whether the statement is true or false
The Hazaras are Shi'ite Muslims
Indicate whether the statement is true or false
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