Students in grade 6 understand the relationships between time and position when describing motion. Students understand the transfer of potential and kinetic energy. Students investigate properties of waves, including light, sound, and other energies. Students understand the relationships between celestial bodies and the force that keeps them in regular and predictable motion. Students describe the complex relationships that exist between organisms in all ecosystems and they understand that the major source of energy for all ecosystems is the sun. The science and engineering processes and engineering opportunities are integrated with content throughout the course. Along with the current academic standards, the Science/Technical Studies Content Area Literacy Standards are incorporated in the teaching of this subject with the expectation of a continuum of reading and writing skills development.