Absolute dating measures unstable atoms of a sample, which occur because of

Radioactive decay
Half-life
Relative Dating
Erosion

The Precambrian Era was dominated by _____ life forms, the Paleozoic Era, _________, Mesozoic, _________, and Cenozoic is dominated by ___________. *

Dinosaurs, Mammals, Aquatic, Single-Celled
Single-Celled, Aquatic, Mammals, Dinosaurs
Mammals, Dinosaurs, Aquatic, Single-Celled
Single-Celled, Aquatic, Dinosaurs, Mammals