NATIONAL STANDARDS: National Science Standards, Grades K-4- Life Science: III. Content Standard C- Organisms have basic needs such as air, water, and food; they can survive only in environments in which their needs can be met.- Humans depend on their natural and constructed environments, and change environments in ways that can be either beneficial or detrimental.- Science in Personal and Social Perspectives: VI. Content Standard F- The supply of resources is limited.- Environments are the space, conditions, and factors that affect an individual's and a population's ability to survive and their quality of life.