behavior: The way something (often a person or other organism) conducts itself or acts towards others.
biologist: A scientist involved in the study of living things.
chain reaction: An event that once started continues to keep itself going. It’s a term frequently used to describe atomic fission in a nuclear power plant.
chemical: A substance formed from two or more atoms that unite (bond) in a fixed proportion and structure. For example, water is a chemical made when two hydrogen atoms bond to one oxygen atom. Its chemical formula is H2O. Chemical also can be an adjective to describe properties of materials that are the result of various reactions between different compounds.
chemical signal: A message made up of molecules that get sent from one place to another. Bacteria and some animals use these signals to communicate.
computer model: A program that runs on a computer that creates a model, or simulation, of a real-world feature, phenomenon or event.
ecologist: A scientist who works in a branch of biology that deals with the relations of organisms to one another and to their physical surroundings.
engineer: A person who uses science and math to solve problems. As a verb, to engineer means to design a device, material or process that will solve some problem or unmet need.
model: A simulation of a real-world event (usually using a computer) that has been developed to predict one or more likely outcomes. Or an individual that is meant to display how something would work in or look on others.
physicist: A scientist who studies the nature and properties of matter and energy.
random: Something that occurs haphazardly or without reason, based on no intention or purpose. Or an adjective that describes some thing that found itself selected for no particular reason, or even chaotically.
technology: The application of scientific knowledge for practical purposes, or the devices, processes and systems that result from those efforts.
transition: The boundary where one thing (paragraphs, ecosystems, life stage, state of matter) changes or converts into another. Some transitions are sharp or abrupt. Others slowly or gradually morph from one condition or environment to another.