Big Bang and Cosmology

Directions: Answer the following questions in complete sentences. A diagram may be utilized when appropriate.

1) When do scientists believe the big bang took place?

2) What occurred to the universe in the 1^st second after the Big Bang?

3) When did atoms begin to form in the universe?

4) When did light appear in the universe?

5) What four reasons do scientists give that support the Big Bang theory?

6) Which reason do you feel is the most compelling in support of the Big Bang theory? Why?

7) Why is the Big Bang a theory and not a law?

8) By what magnitude has the temperature changed since the Big Bang occurred?