As water soaks through the ground , it first passes through a rock layer that has pores that are mostly filled with air . what is this zone called ?
a) zone of saturation
b) zone of premeability
c) zone of porosity
d) zone of aeration

Directions: read the descriptions of the four islands presented in the lesson. 1. list two new traits that each new species of rat might demonstrate as it adapts to the conditions on each island. 2. introduce one of the four new rat species to another island and describe one challenge it would encounter and one success as it adapts to its new environment.

Cattle with brown fur and cattle with white fur will produce a reddish roan calf . when examined closely, the calf show about an even number of brown hairs and white hairs that give a reddish appearance when viewed from far away. the fact that both the brown fur allele and the white fur allele are expressed equally in the offspring is an example of

What are some natural processes that represent physical and chemical changes?