7th Grade Science: Solar System

The process that caused early Earth to form three distinct layers

• Outgassing
• Planetesimal
• Differentiation
• Protoplanet

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

• Outgassing
• Solar Nebula
• Planetesimal
• Protoplanet

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

• Core Planet
• Solar Nebula
• Protoplanet
• Outgassing

A larger body formed when planetesimals joined together

• Outgassing
• Protoplanet
• Planetesimal
• Solar Nebula

The process responsible for forming Earth's early atmosphere

• Outgassing
• Ingassing
• No gas
• Differentiation

The degree of elongation of an elliptical orbit

• Gravity
• Inertia
• Eccentricity
• Retrograde motion

The time required for a body to complete a single orbit

• Orbital period
• Rotation
• Revolution
• 1 year

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

• Retrograde Motion
• Forward Motion
• Spinning
• Revolutions

The force that exists between any two bodies in the universe

• Gravity
• Law of equal areas
• Inertia
• Orbital period

A planet similar to Earth in size, mass & density

• Venus
• Jupiter
• Uranus
• Mars