By using sound waves, signals allow oceanographers to determine ocean depth. a. phone b. radio c. sonar d. radar

The african continent is home of the worlds largest desert and longest river . t or f

Which year held a congressional election and a presidential election

Since 1980, which three countries have either attacked or been attacked by iraq? a. iran, turkey, united states b. iran, israel, jordan c. iran, kuwait, united states d. iran, saudi arabia, egypt