Chapter 1 Student name:__________ 1) Erosion is a result of Earth’s external heat engine, powered by (choose all that apply) A) the Sun B) gravity C) heat flowing from Earth’s interior outward 2) The Earth's system that includes the oceans, rivers, lakes, and glaciers of the world is called the _______. A) biosphere B) hydrosphere C) atmosphere D) geosphere E) solid Earth
