DC CAPE 2.0 Science Grade 8 study guide
DC CAPE 2.0 Science Grade 8 · Work through your exam, one topic at a time.
DC CAPE 2.0 Science Grade 8 is a District of Columbia statewide summative assessment measuring how well eighth-grade students have mastered the middle school science standards. It is taken by students in DC public and public charter schools as part of federal and local accountability requirements, and results are used by schools, families, and educators to gauge readiness for high school science coursework. The DC CAPE 2.0 Science Grade 8 study guide has 8 sections and about 2,601 words.
01Matter and Its Interactions
Grade 8 matter content centers on the particle model and on how substances combine and change. Understand that matter is made of atoms, that atoms of an element are alike in proton number, and that molecules form when atoms bond.
333 words, about 2 min02Motion and Stability: Forces and Interactions
This domain links motion description to the causes of motion. Be fluent with speed = distance/time , velocity as speed with direction, and acceleration as a change in velocity (speeding up, slowing down, or turning).
328 words, about 2 min03Energy
Energy is the capacity to cause change and appears in forms: kinetic (motion), potential (position or stored), thermal , chemical , electrical , light , and sound . Energy is conserved: it transfers between objects and transforms between forms, but the total stays constant.
337 words, about 2 min04Waves and Their Applications in Technologies for Information Transfer
A wave carries energy without carrying matter along with it. Know the anatomy of a wave: wavelength , frequency , amplitude , and speed , and the relationship speed = frequency × wavelength .
325 words, about 2 min05From Molecules to Organisms: Structures and Processes
This domain connects cell structure to body function. Understand that cells are the basic unit of life, that cell membranes control what enters and leaves, that mitochondria release energy from food, and that chloroplasts in plant cells capture light for photosynthesis.
324 words, about 2 min06Ecosystems: Interactions, Energy, and Dynamics
Ecosystems are communities of organisms interacting with each other and with the nonliving environment. Understand roles: producers capture energy (usually from sunlight), consumers eat other organisms, and decomposers break down dead material and recycle nutrients.
330 words, about 2 min07Heredity: Inheritance and Variation of Traits
Heredity explains how traits pass from parents to offspring. Genes are segments of DNA on chromosomes; each parent contributes one allele for many traits.
302 words, about 2 min08Earth's Place in the Universe and Earth's Systems
This domain spans space and Earth processes. Know that Earth rotates on its axis (about 24 hours) causing day and night, and revolves around the Sun (about 365 days) with a tilted axis causing seasons.
322 words, about 2 min