OK.E/SS. EARTH/SPACE SCIENCE
E/SS.5. Structures of the Earth and the Solar System - The earth is mostly rock, three-fourths of its surface is covered by a relatively thin layer of water, and the entire planet is surrounded by a relatively thin blanket of air, and is able to support life. The student will engage in investigations that integrate the process standards and lead to the discovery of the following objectives:
E/SS.5.1. Earth has four main systems that interact: the geosphere, the hydrosphere, the atmosphere, and the biosphere.
E/SS.5.1.b. The hydrosphere is the liquid water component of the Earth. Water covers the majority of the Earth's surface and circulates through the crust, oceans and atmosphere in what is known as the water cycle.