11) what is one problem noted with a mercator projection? 12) there is a lot of concern about the impact of people on the environment. which branch of geography looks at the long term availability of resources in order to continue ongoing activities? 13) what is the albedo of the earth, and what does albedo mean?

11) Size distortion

12) Human geography

Explanation:

In case of Mercator Projection, when there is an increase in latitude while moving from equator to pole, the scale tends to infinity.Lets take the case of Greenland and Africa, if we consider Mercator Projection, both are of equal size but in reality Greenland is much smaller than Africa.The branch of science that studies the affect of human activities on the environment is referred to as Human geography.Albedo can be defined as the degree f reflection or the measure of brightness of a surface.Albedo is dimensionless and varies from 0 to 1 for black body and white body respectively.The Albedo of the Earth is about 0.30

Why the planet stays in orbit is because of inertia (object stays in motion until a force changes it’s motion) also the atmosphere and gravity!