Standard 1: Students will understand the scientific evidence that supports theories that explain how the universe and solar system developed.

Objective 1: Describe the big bang theory and evidence supporting it.
a. Determine the motion of a star relative to Earth based on a red or blue shift in the wavelength of light from the star.
b. Explain how evidence of red and blue shifts is used to determine whether the universe is expanding or contracting.
c. Describe the big bang theory and the red shift evidence that supports this theory.