Which is the least dense? younger oceanic crust, older oceanic crust, earth's core,?

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.

Which city area has the most accessible oil reserves a) caspian sea b) siberia c)arctic coast d)lake baikal

Which describes italy’s mediterranean climate? a. moist in the summer and dry in the winter b. mild and wet all year round c. cool in the summer and warm in the winter d. hot in the summer and mild in the winter