Arts and Sciences (245)
Coverage
Part Three (245) samples science, social studies, and the arts. Science: inquiry and the difference between observation, inference, hypothesis, and theory; matter and energy; forces and motion; life cycles, heredity, and ecosystems; earth materials, weather, and the solar system. Social studies: chronology and historical thinking, primary versus secondary sources, geography and map skills, civics and government, and basic economics. Arts: elements (line, shape, color, texture, form, space) versus principles (balance, contrast, pattern, emphasis); music elements such as rhythm, melody, and timbre; drama and dance fundamentals. Health and safety topics may also appear.
Traps
The recurring trap is conflating observation with inference: "the plant is 12 cm tall" is an observation; "the plant needs more light" is an inference. In science, "theory" means a well-tested explanation, not a guess. In history, a primary source is an artifact, letter, or photograph from the period, not a textbook summarizing it. In geography, check whether the question asks for absolute location (coordinates) or relative location (near, north of). In the arts, elements are the ingredients and principles are how they are arranged.
Worked example
A student writes, "The ice cube melted because the room was warm." Melting is the observed change; "because the room was warm" is an inference that must be tested by measuring temperature. Rule of thumb: if it can be measured with a tool, it is an observation; if it must be concluded, it is an inference.