If old mountains are worn down over the course of millions of years, what is one of the primary reasons that mountains still exist? A. New mountains are created through city development. B. New mountains are created from leaf litter. C. New mountains are created through tectonic and volcanic activity. D. New mountains are created from decomposition of plants and animals.

Paraguay is one of the only two countries in the americas that don't have a coastal border. the country is slightly smaller than california. it was under a military dictatorship for 35 years, ending in 1989; today it is a constitutional republic. most of the population is roman catholic, and over 60% of the people live in cities. its environment is threatened by deforestation and water pollution. which of the following facts from the paragraph above best describes an element of paraguay's culture? (apex)

The blue segment below is a diameter of oo. what is the length of the radius of the circle?

Which of the following can scientists estimate geologic time? a.observing rock sequences b.radiometric dating c.comparing fossils d.all of these