An organized way of using evidence to learn about the natural world.
The process of gathering information about events or processes in a careful, orderly way.
The information gathered from observations.
A logical interpretation based on prior knowledge or experience.
A proposed scientific explanation for a set of observations.
The idea that life could arise from non-living matter.
An experiment in which only one variable is changed at a time and all other variables are kept unchanged.
The variable that is deliberately changed.
The variable that is observed and that changes in response to the manipulated variable.
A well-tested explanation that unifies a broad range of observations.
The science that employs the scientific method to the study of living things.
Basic unit of all forms of life.
The process by which organisms maintain a relatively stable internal environment.
The process by which a single parent reproduces by itself.
The process by which cells from two different parents unite to produce the first cell of a new organism.
A set of chemicals reactions through which an organism builds up or breaks down materials as it carries out its life processes.
A signal to which an organism responds.
a decimal system of measurement whose units are based on certain physical standards and are scaled on multiples of 10.
A device that produces magnified images of structures that are too small to see with the unaided eye.
compound light microscope
A microscope that allows light to pass through a specimen and uses two lenses to form an image.
A microscope that uses beams of electrons to produce images.
A group of cells grown in a nutrient solution from a single original cell.
A technique in which cells are broken into pieces and the different cell parts are separated.