Earth and Space Systems - Vocabulary - TLC (ESS.1B)

Front

system

Back

a group of related parts that work together to perform a task or complete a process

Front

natural system

Back

a group of related parts working together that was not made by humans

Front

planet

Back

a large object that is nearly spherical, orbits the Sun, and has no other objects of comparable size in its orbit

Front

moon

Back

a natural satellite of a planet, dwarf planet, or asteroid

Front

galaxy

Back

a system made up of a large number of stars held together by gravity

Front

orbit

Back

a path that an object follows when it moves around another object in space due to gravity

Front

comet

Back

a celestial body made up of a nucleus, coma, and tail that orbits the Sun; ice, frozen carbon dioxide, rock, and dust make up the nucleus

Front

asteroid

Back

a small, rocky body that orbits the Sun; most asteroids lie in the main asteroid belt situated between the orbits of Mars and Jupiter

Front

satellite

Back

a small body that orbits a planet or a star

Front

dwarf planet

Back

an object that is nearly spherical, orbits the Sun, and has other objects of comparable size in its orbit