16.The rate of weathering depends primarily upon the area's .

Based on their location in the atmosphere, the layers are able to have their own special characteristics. for example, most weather occurs in the troposphere. what occurs in each of the other layers? (site 1)

Iron reacts with oxygen to produce iron oxide (rust). this reaction is represented in an equation as 4fe + xo2 → 2fe2o3. identify the value of x that will balance the equation.

What environmental cues and landmarks do the geese use to determine the timing and direction of their migration over the mountains? how do they find their way?