Individual city-states developed in Greece because the country was divided by

Mountains

Lakes

Rivers

In Ptolemy's Earth-centered model for the solar system, Venus's phase is never full as viewed from Earth because it always lies between Earth and the Sun. In reality, as Galileo first recognized, Venus is:

What shapes are used to make map projections?

What does the phrase " going green" mean

Where did the people in Mesopotamia live before city states existed

Describe the main figures of global warming.

Which phrase best defines topography?

Which statement describes the impact of ocean currents on climate? Ocean currents create changes in the temperature of air over land masses. Ocean currents cause the temperature of air over large bodies of water to change.

Identify the three main stages of a tropical cyclone

Production was often inefficient under communist rule because people

Which of the following would decreasethe resistance to the flow of an electric current through a body?