7th Grade Science: Solar System

Front

The process that caused early Earth to form three distinct layers

Back

Differentiation

Front

A small body from which a planet originated in the solar system's early development

Back

Planetesimal

Front

A rotating cloud of gas and dust that gave rise to Earth's solar system

Back

Protoplanet

Front

A larger body formed when planetesimals joined together

Back

Protoplanet

Front

The process responsible for forming Earth's early atmosphere

Back

Outgassing

Front

The degree of elongation of an elliptical orbit

Back

Eccentricity

Front

The time required for a body to complete a single orbit

Back

Orbital period

Front

A pattern that makes it appear as though planets are moving backward in the sky

Back

Retrograde Motion

Front

The force that exists between any two bodies in the universe

Back

Gravity

Front

A planet similar to Earth in size, mass & density: Venus, Jupiter, Uranus, Mars

Back

Venus