Chapter 20 Formation of the Solar System

The visible layer of the sun

• Photosphere

• mantle

• revolution

• nuclear fusion

• sunspot

a complete trip along an orbit

• Photosphere

• mantle

• revolution

• nuclear fusion

• sunspot

the process that provides the sun with its energy

• solar flare

• sunspot

• nuclear fusion

• nuclear fision

the layer of Earth that formed as lighter elements floated to the surface

• mantle

• nebula

• crust

• rotation

the spinning body on its axis

• revolution

• rotation

• orbit

• hemisphere

the path a body follows as it travels around another body in space

• revolution

• rotation

• orbit

• hemisphere

the layer of Earth above the core

• mantle

• nebula

• crust

• rotation

a huge eruption on the surface of the sun

• sunspot

• nebula

• nuclear fusion

• solar flare

a cooler, dark area of the photosphere

• sunspot

• photosphere

• nuclear fusion

• solar flare

a cloud of gas and dust from which bodies in space are formed

• revolution

• photosphere

• nuclear fusion

• nebula