(6) Matter and energy. The student knows that matter has physical and chemical properties and can undergo physical and chemical changes. The student is expected to
 distinguish between physical and chemical changes in matter.
(12) Organisms and environments. The student knows that living systems at all levels of organization demonstrate the complementary nature of structure and function. The student is expected to:
(B) identify the main functions of the systems of the human organism, including the circulatory, respiratory, skeletal, muscular, digestive, excretory, reproductive, integumentary, nervous, and endocrine systems;
(C) recognize levels of organization in plants and animals, including cells, tissues, organs, organ systems, and organisms;
(E) compare the functions of cell organelles to the functions of an organ system; and
(13) Organisms and environments. The student knows that a living organism must be able to maintain balance in stable internal conditions in response to external and internal stimuli. The student is expected to:
(A) investigate how organisms respond to external stimuli found in the environment such as phototropism and fight or flight; and
(B) describe and relate responses in organisms that may result from internal stimuli such as wilting in plants and fever or vomiting in animals that allow them to maintain balance.