20/50/80 menu: Crossword

The science that employs the scientific method to studying living things
An individual living thing
The part of the earth that contains all ecosytems
A community and its nonliving surroundings
Populations that live together in a defined area
A group of organisms of one type that live in the same area
Tissues, organs, and organ systems
the smallest functional unit of life
groups of atoms; smallest unit of most chemical compounds
The variable that is deliberately changed
The variable that is observed and that changes in response to the manipulated variable
the Information gathered from observations
Logical interpretation based on prior knowledge or experience
A proposed scientific explanation for a set of observations
The process of gathering information about events or processes in a careful, orderly way
well tested explanation that unifies a broad range of observations
obtain energy by eating only plants
eat animals
eat both plants and animals
a series of steps in which organisms transfer energy by eating and being eaten