Surface currents are caused by friction between which two elements

Which statements correctly identify a condition that must exist for a culture to be considered a civilization

What side of the american civil war would you choose to fight for and why

Which lake receives up to 9 million visitors each year, covers more than 90,000 acres, and was created by denison dam? a. the grand lake o' the cherokees b. lake thunderbird c. lake eufaula d. lake texoma