Those properties can be measured using tools. Objects can be described by the properties of the materials from which they are made, and those properties can be used to separate or sort a group of objects or materials. Earth and Space Science Properties of earth materials Earth materials are varied and have different physical and chemical properties that make them useful in different ways. Earth materials provide many of the resources needed by humans. People have always had questions about their world.
Science is one way of answering questions and explaining the natural world.
People have always had problems and invented tools and techniques to solve them. Scientists and engineers often work in teams with different individuals doing different things that contribute to the results. Tools help scientists make better observations, measurements, and equipment for investigations. They help scientists see, measure, and do things that they could not otherwise see, measure, and do . Science in Personal and Social Perspectives Personal health Safety and security are basic needs of humans.