DC CAPE 2.0 Science Grade 8 case studies
DC CAPE 2.0 Science Grade 8 · Put your knowledge to work in context.
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 case studies are 5 cases and about 1,963 words.
1Cooling Curve of an Unknown Mixture
A student heats 50 g of an unknown solid in a beaker over a hot plate while stirring and records temperature every 30 seconds. The data show: steady rise from 22 °C to 68 °C over 5 minutes; then the temperature holds at 68 °C for 3 minutes even though heating continues; then it rises again to 95 °C; then holds near 95 °C for 2 minutes while the material becomes fully liquid.
422 words, about 2 min2Crate on a Ramp with Friction
A 20 kg crate sits on a ramp inclined at 30° above the horizontal. A student calculates the component of gravity pulling the crate down the ramp as about 98 N and the normal force as about 170 N.
396 words, about 2 min3Two Lamps, One Battery: Series vs. Parallel
A student builds a circuit with a 6 V battery and two identical lamps, each with resistance 12 Ω. In arrangement A the lamps are wired in series; in arrangement B they are wired in parallel.
373 words, about 2 min4Fossil Layers and a Changing Coastline
A class examines a cliff exposure with three sedimentary layers. The bottom layer contains shells of marine organisms and ripple marks.
368 words, about 2 min5A Trait That Skips a Generation
In a family, neither parent has a particular condition, but their daughter has it and their son does not. The mother's father also had the condition.
404 words, about 2 min