1inch of rain per year or less in grassland? is this a lot or a little of rain?

What are the 5 basic elements of a map?

How are farmers that use no plow farming methods able to improve air quality for the people around the fram

Simple astronomical telescope the objective lens has a focal length of 75 cm and that of a piece of 5cm of the lenses are 18 cm apart when will be final image of a distant object before