TEKS: Chapter 112. Science See All Teacher Resources

112.36.c.7

(7)  Earth in space and time. The student knows that scientific dating methods of fossils and rock sequences are used to construct a chronology of Earth's history expressed in the geologic time scale. The student is expected to:

• (A)  evaluate relative dating methods using original horizontality, rock superposition, lateral continuity, cross-cutting relationships, unconformities, index fossils, and biozones based on fossil succession to determine chronological order;

• (B)  calculate the ages of igneous rocks from Earth and the Moon and meteorites using radiometric dating methods; and

• (C)  understand how multiple dating methods are used to construct the geologic time scale, which represents Earth's approximate 4.6-billion-year history.