Objects are made of one or more materials and can be described by the properties from which they are made. Some common materials, such as water, can be changed from one state to another. Position and motion of objects An object's motion can be described by tracing and measuring its position over time. The position of an object can be described by locating it relative to another object. When the environment changes, some plants and animals survive, and others die or move.
All organisms cause changes in the environment where they live.
Some changes are detrimental to the organism, others are beneficial. Humans depend on both their natural and their constructed environment. Humans change environments in ways that can either be beneficial or detrimental for other organisms. Soils have properties of color and texture, capacity to retain water, and ability to support the growth of many kinds of plants. The surface of the earth changes through processes such as erosion, weathering, and landslides.