Ch. 13 McGraw Hill (7th Grade)

STUDY
PLAY
Carbon Cycle
is the series of processes that continuously move carbon among Earth systems.
Greenhouse gases
are gases in the atmosphere that absorb and reradiate thermal energy from the sun.
Phosphorus Cycle
is the series of processes that move phosphorus among Earth systems.
Luster
is the way a minerals surface reflects light
Streak
is the color of a mineral's powder
Cleavage
is the tendency of minerals to break along smooth, flat surfaces.
Fracture
is the tendency of minerals to break along irregular surfaces
Crust
is he thin outer layer of the geosphere
Mantle
is the thick, rocky middle layer of the geosphere.
Lithosphere
The crust and the upper most mantle form a brittle outer layer
asthenosphere
The weak, partially melted layer of the mantle
Core
The dense metallic center of Earth