![]() Characteristics and Life Processes of Organisms Finally, developing a science-based understanding of human health enables students to improve the condition of their lives and the lives of others. Learning the concepts of adaptation and natural selection provides a foundation for understanding evolution, and an understanding of processes and interactions in ecosystems is essential for students to begin to think about how to develop solutions to many environmental challenges. At this level, the study of reproduction and heredity provides a foundation for later, more advanced study of molecular biology and molecular genetics. They also should have a foundational understanding of cell structure and function and the processes of photosynthesis and cellular respiration. Eighth grade students are expected to understand how structure relates to function in organisms. Diversity, adaptation, and natural selectionĬoncepts learned in each of these topic areas are essential for preparing students for more advanced study.Life cycles, reproduction, and heredity.Characteristics and life processes of organisms.The biology domain includes six topic areas: BiologyĪt the eighth grade, students build on the foundational life science knowledge they learned in the primary grades, and develop an understanding of many of the most important concepts in biology. Each objective can be assessed drawing on each of the three cognitive domains (knowing, applying, and reasoning). The verbs used in the objectives are intended to represent typical performances expected of eighth grade students, but are not intended to limit performances to a particular cognitive domain. Across the eighth grade assessment, each objective receives approximately equal weight in terms of assessment items. ![]() Each topic is further described by specific objectives that represent the students’ expected knowledge, abilities, and skills assessed within each topic. Exhibit 2.3 shows the target percentages for each of the four content domains in the TIMSS 2019 science assessment.Įxhibit 2.3: Target Percentages of the TIMSS 2019 Science Assessment Devoted to Content Domains at the Eighth Grade Eighth Grade Content DomainsĮach of these content domains includes several major topic areas, and each topic area in turn includes one or more topics. ![]() Science Cognitive Domains-Fourth and Eighth Gradesĭownload TIMSS 2019 Science Framework (pdf) Science Content Domains–Eighth Gradeįour major content domains define the science content for the TIMSS Science eighth grade assessment: biology, chemistry, physics, and Earth science.
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