What have scientists inferred about the outer portion of the earth's core by monitoring the time of arrival of p- and s-waves at monitoring stations around the world? a. it is a dense solid. b. it is liquid-like. c. it is organic material. d. it is a pressurized gas.

How did geography influence the development of ancient greece?

What structure on the south african coast has a range of 63 km and releases flashes every 30 seconds?

Which of the following best describes brazil's economy from 1650-1880? a. it gradually shifted to manufacturing as the industrial revolution progressed. b. it was based on mining. c. it was based on plantation agriculture, where slaves served as a labor force. d. it was based on small, family-owned farms.