What observations are needed to tell whether an earth-like planet is geologically alive or dead?

Complete the activity titled "comparative urban environments." every city is shaped by different cultural forces. in one to two paragraphs, contrast the culture of two different cities from this activity: new york and buenos aires. what makes these cities stand apart from each other culturally? what is unique about each city’s attitude, language, habits, foods, or architecture?

Which anatomical feature would you expect to find in the fossil remains of a nocturnal species?

What man-made lake was created by the building of the hoover dam?