The document discusses evidence that supports the Big Bang theory of the origin and expansion of the universe. It explains that background radiation from the early universe, the observation of galaxies moving away from Earth, and a temperature of about 3 degrees above absolute zero provide observational evidence for the Big Bang. It also outlines two possible futures for the universe - either continuing to expand indefinitely or eventually collapsing back on itself and undergoing another Big Bang.

1. Please explain on your note card how this picture explains the Doppler Effect and how it relates to “Shifts in light”.

2. THE BIG BANG THEORY States that the universe began as a single cosmic explosion about 15 billion years ago .

5. HUBBLES LAW The farther away the galaxy, the faster it is receding (moving away) from the earth.

14. Quasar