is composed of basalt, a heavy, dark-colored, iron-rich rock that is also high in silicon (Si) and magnesium (Mg).
Oceanic Crust
25
resistance to scratch.
Hardness
25
Too little sunlight and chemicals, organisms die ( true or false )
true
25
the uppermost mantle and overlying crust form a single structural unit. The term _________ has traditionally been used to describe the entire solid earth
Lithosphere
25
Too much activity presents organisms ability to get enough nutrients.( true or False )
True
25
comprises the major landmasses on earth that are exposed to the atmosphere. At 2.7 g/cm
Continental Crust
25
lines of weakness in the structure of minerals.
Cleavage
25
• The inner four planets, Mercury, Venus, Earth, and Mars, are called _________
