Some animals eat plants for food. Other animals eat animals that eat the plants. An organism's patterns of behavior are related to the nature of that organism's environment, including the kinds and number of other organism present, the availability of food and resources, and the physical characteristics of the environment. All organisms cause changes in the environment where they live. Some of these changes are detrimental to the organism or the organisms, whereas others are beneficial.
Humans depend on their natural or constructed environments.
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. Tools help scientists make better observations and measurements. They help scientists see, measure, and do things that they could not otherwise see, measure, and do.