The sun provides the light and heat necessary to maintain the temperature of the earth. Changes in the earth and sky Weather changes from day to day and over the seasons. Weather can be described by measurable quantities, such as temperature, wind direction and speed, and precipitation. Objects in the sky have patterns of movement . People have always had questions about their world.
Science is one way of answering questions and explaining the natural world.
Scientists and engineers often work in teams with different individuals doing different things that contribute to the results. Women and men of all ages, backgrounds, and groups engage in a variety of scientific and technological work. Tools help scientists make better observations, measurements, and equipment for investigations. They help scientists see, measure, and do things they could not otherwise see, measure, and do. Abilities to distinguish between natural objects and objects made by humans Objects can be categorized into two groups, natural and designed.