Is my answer to question 8 correct if not please help thank you so much! :)

What are the similarities and differences in the way geologists and biologists approximate the age of the earth? justify your response in two or more complete sentences.

Ozone in the upper atmosphere has been depleted by a. sulfur dioxide. b. chlorofluorocarbons. c. carbon dioxide. d. oxygen.

Acharreadas is a popular mexican thing where people display varying skills of horsemanship much like what events in the united states?