What is the term used to describe the area where thin oceanic plates spread apart, releasing magma and creating new oceanic crust?

The process by which natural forces move weathered rock and soil brim one place to another is called

Complete the possible outcomes for each generation in the pedigree chartaa aa aa

Each pair of clay balls represents two planetesimals. if each planetesimal is composed of the same material and is separated he the same distance, which pair experiences the frayed gravitational attraction?