Redbeds are hematite layers between layers of rock. they can indicate the presence of which element in the atmosphere?

a. oxygen
b. nitrogen
c. carbon
d. helium

If scientists only detect p waves in a certain layer of earths interior what does that tell us?

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)

What does the kyoto protocol aim to reduce