What is a light-year? a light-year is

Which theory suggested that the earth was once a signle supercontient that gradually that broke up into the contients that we know today

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