Washington Comprehensive Assessment of Science (WCAS) Grade 8 study guide
Washington Comprehensive Assessment of Science (WCAS) Grade 8 · Work through your exam, one topic at a time.
The Washington Comprehensive Assessment of Science (WCAS) is a Washington state science assessment administered through the Office of Superintendent of Public Instruction (OSPI). In OSPI's site navigation, the WCAS appears as one of the state testing programs listed alongside WaKIDS, Smarter Balanced, and the WA-AIM, and it is grouped under the Science subject-area resources. The Washington Comprehensive Assessment of Science (WCAS) Grade 8 study guide has 3 sections and about 1,169 words.
01Physical Science: Matter, Motion, and Energy
Washington grade-8 physical science items ask you to explain phenomena using a small set of big ideas: matter is made of particles whose motion and spacing explain properties and phase changes; energy transfers between objects and between forms but is conserved in a closed system; forces change motion, and an object with balanced forces keeps doing what it was doing; and waves carry energy, not matter, with amplitude linked to energy and frequency/wavelength linked inversely. Confusing weight and mass.
407 words, about 2 min02Life Science: Cells, Body Systems, and Ecosystems
Life science items emphasize that cells are the basic unit of life , that structure relates to function at every scale (organelle, tissue, organ, system, organism), that body systems interact to maintain stable internal conditions, and that organisms interact with each other and their environment through food webs, competition, and matter/nutrient cycling. Genetics basics - traits inherited through genes, with environment also influencing expression - appear at an introductory level.
376 words, about 2 min03Earth and Space Science: Earth Systems and the Solar System
Earth and space items connect Earth's interior and surface processes (plate tectonics, earthquakes, volcanoes, weathering and erosion, rock formation) to large-scale cycles (water, carbon, rock), and place Earth in the solar system with patterns explained by gravity, rotation, revolution, and tilt. Expect questions on how energy from the Sun and Earth's internal heat drive different processes, and on using evidence such as rock layers, fossils, and landforms to infer sequence and history.
386 words, about 2 min