People's perception of benefits and risks related to drought are often based on their past experiences and other information that they have heard or read about drought. Responses may vary showing the diversity of the perception of drought and the actions to impacts. Students should formulate a testable hypothesis and demonstrate the logical connections between the scientific concepts guiding a hypothesis and the design of an experiment. They should demonstrate appropriate procedures, a knowledge base, and conceptual understanding of scientific investigations. Do factors like soil-water relationships and water demand play an important part in defining drought.
Populations can reach limits to growth.
Carrying capacity is the maximum number of individuals that can be supported in a given environment. The limitation is not the availability of space, but the number of people in relation to resources and the capacity of earth systems to support human beings. Changes in technology can cause significant changes, either positive or negative, in carrying capacity. Water resources can limit the caring capacity of an area. Humans have developed means of meeting water demand to a certain extent, but the solutions may affect plants, animals and other humans.