The concept of the nation that could be created, directed, and served by rational thought was established by the .

Romans

Persians

Greeks

Spanish

What major factors play a role in global warming? 1. human activity and normal climate conditions 2. natural factors and human activity 3. normal climate conditions and abnormal human activities 4. abnormal human activities and natural factors

Which of the following areas has the highest population density?

What would be the distance of all the planets to the sun in astronomical units?