Science is a year long course for both 7th and 8th grade. The Science curriculum is aligned to the Next Generation Science Standards (NGSS).
When current students graduate from high school, more jobs will require skills in science, technology, engineering, and mathematics (STEM) than in the past. The NGSS provide a strong science education that equips students with the ability to think critically, analyze information, and solve complex problems — the skills needed to pursue opportunities within and beyond STEM fields.
A high-quality, robust science education means students will develop an in-depth understanding of content and will gain knowledge and develop skills—communication, collaboration, inquiry, problem solving, and flexibility—that will serve them throughout their educational and professional lives.
High-quality education standards allow educators to teach effectively, moving their practice toward how students learn best—in a hands-on, collaborative, and integrated environment rooted in inquiry and discovery. Teaching based on the NGSS calls for more student-centered learning that enables students to think on their own, problem solve, communicate, and collaborate—in addition to learning important scientific concepts.
Taken from: https://www.nextgenscience.org/