geologic time scales, historic changes in life forms, and the evidence for absolute ages (e.g., radiometric methods, tree rings, paleomagnetism).
Content of Science
Understand the structure of Earth, the solar system, and the universe, the interconnections among them, and the processes and interactions of Earth’s systems.
Examine the scientific theories of the origin, structure, energy, and evolution of Earth and its atmosphere, and their interconnections.
Characteristics and Evolution of Earth
Understand the changes in Earth’s past and the investigative methods used to determine geologic time, including: