City, State, Country, Continent, etc.

city

a community in a state or country (Examples: Arlington Heights, Buffalo Grove, Chicago, New York City)

galaxy

a group of millions, billions or trillions of stars (Our galaxy is called the Milky Way)

planetary system

a star and its planets (Our star's name is Sol, and our system is the Solar System)

planet

a world in space that is round and large enough to have moons (Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune)

universe

everything that exists anywhere

continent

one of seven huge areas of land on the Earth that can contain countries (North America, South America, Europe, Asia, Africa, Australia and Antarctica)

country

part of a continent that can contain states and often has its own language (Examples: United States, Mexico, Canada, China, Poland, Bulgaria, Russia, Korea, Pakistan, Japan, India, England)

state

part of a country that contains more than one community (Examples: Illinois, Wisconsin, Indiana, Florida, Alaska, Hawaii)