Fossils of fish appeared approximately 500 mya during the
a. archaen
c. proterozoic
b. cambrian
d. phanerozoic

According to the united nations refugee agency, more than 2/3 of the world's refugees come from just five countries. which country is not on that list? a) turkey b) myanmar c) afghanistan d) south sudan

An earthquake’s epicenter can be determined from arrival time data recorded on a(

Which statement explains what upwelling causes? a. upwelling causes tides to rise and fall. b. upwelling causes changes in the direction of currents. c. upwelling causes nutrients, minerals, and tiny organisms to rise. d. upwelling causes currents in the pacific ocean to change direction. i think the answer is c.