The Quarternary is a(n)
a. epoch.
b. era.
c. eon.
d. period.
d
Physics & Space Science
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A chemical reaction is one in which
A. atomic nuclei change form. B. a substance gets hot. C. atoms change mass. D. atoms get rearranged.
Physics & Space Science
Our Sun will first become a red giant, then a white dwarf, and finally a brown dwarf
Indicate whether the statement is true or false
Physics & Space Science
The _________ stars are giant stars fusing helium in their cores and then in their shells
a. turnoff-point b. main-sequence c. turnon-point d. hydrogen-flash e. horizontal-branch
Physics & Space Science
Radiometric dating is based on
A) decay of uranium-238 to lead-206. B) sequence of rocks and the relative position of one layer to another. C) proportions of radioactive isotopes and their decay products. D) the half-life of radioactive atoms.
Physics & Space Science