Humans change environments in ways that can either be beneficial or detrimental for themselves and other organisms. Earth and Space Science Properties of earth materials Earth materials include solid rocks. These materials have different physical properties that make them useful in different ways. Changes in the earth and sky Weather changes from day to day and over the seasons. 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 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. Science in Personal and Social Perspectives Personal health Safety and security are basic needs of humans. Safety involves freedom from risk or danger.