Students will be expected to understand the relationships between Earth, the sun, and the moon; other components in the universe will so be included, such as stars, nebulae, and comets. In addition to knowing what happens during each part of the cycle, students will also be expected to predict the results of modifying these cycles.Students will also be tested on their understanding of how natural and human activity can alter earth system, including natural disasters, gradual land changes and human impacts on soil, water, and air quality.