What are the main concepts that make up the study of earth science?

Nrectangle pqrs, pq = 18, ps = 14, and pr = 22.8. diagonals pr¯¯¯¯¯ and qs¯¯¯¯¯ intersect at point t. what is the length of tq¯¯¯¯¯? a.7b.9c.11.4d.22.8

What's erosion? a. the breakdown of rock into smaller pieces b. the removal of weathered products from rock c. a change in rock resulting from exposure to water d. a chemical change in rock that weakens it

How did geographic isolation affect the islands in the australasia ecozobne?