The sum of all living matter on Earth

(a)  

Parts that make up a whole

(a)  

The thin, solid, outermost layer of Earth. is either continental (landmasses) or oceanic (ocean floors)

(a)  

Portion of the system of Earth that includes Earths interior, rocks and minerals, landforms, and the processes that shape Earth’s surface

(a)  

All the water on Earth’s surface includes all water sources above and below the surface

(a)  

The sphere of solid nickel and iron at the center of Earth. surrounded by the liquid outer core

(a)  

The solid layer of Earth between the crust and the core. made of dense silicates

(a)  

The outer layer of Earth’s core. surrounds the inner core and is made of liquid nickel and iron

(a)  

when rocks are no longer brittle and they begin to flow

(a)