Independent Variable

What is changed in an experiment

Atom

Smallest particle of an element that displays the properties of the element.

Molecule

Union of two or more atoms of the same element; also, the smallest part of a compound that retains the properties of the compound.

Cell

The smallest unit of life that displays all the properties of life; composed of cytoplasm surrounded by a plasma membrane.

Tissue

Group of similar cells combined to perform a common function.

Organ

Combination of two or more different tissues performing a common function.

organ system

Group of related organs working together; examples are the digestive and endocrine systems

Organism

Level of biological organization that includes multiple organ systems; an individual of a species

Population

Level of biological organization that includes groups of organisms of the same species occupying a certain area

Energy

Capacity to do work and bring about change; occurs in a variety of forms

Metabolism

The sum of the chemical reactions that occur in a cell

DNA (deoxyribonucleic acid)

Nucleic acid polymer produced from covalent bonding of nucleotide monomers that contain the sugar deoxyribose; the genetic material of living organisms

Homeostasis

Maintenance of normal internal conditions in a cell or an organism by means of self-regulating mechanisms

Dependent Variable

what you measure at the end of an experiment

Control Variable

What you keep the same between groups in an experiment

domain Archaea

One of the three domains of life; contains prokaryotic cells that often live in extreme habitats and have unique genetic

domain Bacteria

One of the three domains of life; contains prokaryotic cells that differ from archaea because they have their own unique genetic

domain Eukarya

One of the three domains of life