Science Worksheets and Study Guides Eighth Grade. Respiration and excretion

The resources above correspond to the standards listed below:

Kentucky Standards

KY.AE. Academic Expectation
AE.2. Students shall develop their abilities to apply core concepts and principles from mathematics, the sciences, the arts, the humanities, social studies, practical living studies, and vocational studies to what they will encounter throughout their lives.
2.5. Science: Students understand that under certain conditions nature tends to remain the same or move toward a balance.
KY.PS. Program of Studies 2006
SC-8-ET. Big Idea: Energy Transformations (Unifying Concepts) - Energy transformations are inherent in almost every system in the universe - from tangible examples at the elementary level, such as heat production in simple Earth and physical systems to more abstract ideas beginning at middle school, such as those transformations involved in the growth, dying and decay of living systems. The use of models to illustrate the often invisible and abstract notions of energy transfer will aid in conceptualization, especially as students move from the macroscopic level of observation and evidence (primarily elementary school) to the microscopic interactions at the atomic level (middle and high school levels). (Academic Expectations 2.1, 2.2, 2.3, 2.4)
SC-8-ET-U-7. Program of Studies: Understandings - Students will understand that many systems contain feedback mechanisms that serve to keep changes within specified limits.