Science Red Cards

Front

Organism

Back

A living thing

Front

Cell

Back

The basic unit of structure and function in living things

Front

Unicellular

Back

Made of a single cell

Front

Multicellular

Back

Consisting of many cells

Front

Stimulus

Back

Any change or signal in the environment that can make an organism react in some way.

Front

Response

Back

An action or change in behavior that occurs as a result of a stimulus.

Front

Spontaneous generation

Back

The mistaken idea that living things arise from nonliving sources

Front

Homeostasis

Back

The condition in which an organism's internal environment is kept stable in spite of changes in the external environment.

Front

Cell theory

Back

A widely accepted explanation of the relationship between cells and living things

Front

Microscope

Back

An instrument that makes small objects look larger.