Environmental Science Ch. 2 Vocabulary

Front 1

Atomic Number

Back 1

The number of protons in an atomic nucleus

Front 2

Atom

Back 2

The atom is a basic unit of matter that consists of a dense, central nucleus

Front 3

Cells

Back 3

The cell is the functional basic unit of life

Front 4

Chemical Change

Back 4

Substances are changed into different substances

Front 5

Chemical Formula

Back 5

A way of expressing information about the atoms that constitute a particular chemical compound

Front 6

Chemical Reaction

Back 6

A process that leads to the transformation of one set of chemical substances to another

Front 7

Chromosome

Back 7

A chromosome is an organized structure of DNA and protein found in cells

Front 8

Compounds

Back 8

Compounds are groups of two or more elements that are bonded together

Front 9

Electrons

Back 9

A subatomic particle with a negative elementary electric charge

Front 10

Elements

Back 10

A class of substances that cannot be separated into simpler substances by chemical means

Front 11

Energy

Back 11

To do work

Front 12

Energy Efficiency

Back 12

Goal of efforts to reduce the amount of energy required to provide products and services

Front 13

Energy Productivity

Back 13

The output and quality of goods and services generated

Front 14

Energy Quality

Back 14

Differences in the ability of a unit of energy to produce goods and services for people

Front 15

First Law of Thermodynamics

Back 15

An expression of the principle of conservation of energy

Front 16

Chemical Reaction

Back 16

A process that leads to the transformation of one set of chemical substances to another

Front 17

Chromosome

Back 17

A chromosome is an organized structure of DNA and protein found in cells

Front 18

Compounds

Back 18

Compounds are groups of two or more elements that are bonded together

Front 19

Electrons

Back 19

A subatomic particle with a negative elementary electric charge

Front 20

Elements

Back 20

A class of substances that cannot be separated into simpler substances by chemical means

Front 21

Energy

Back 21

To do work

Front 22

Energy Efficiency

Back 22

Goal of efforts to reduce the amount of energy required to provide products and services

Front 23

Energy Productivity

Back 23

The output and quality of goods and services generated

Front 24

Energy Quality

Back 24

Differences in the ability of a unit of energy to produce goods and services for people

Front 25

First Law of Thermodynamics

Back 25

An expression of the principle of conservation of energy

Front 26

Genes

Back 26

DNA

Front 27

Heat

Back 27

Form of energy which transfers among particles in a substance (or system) by means of kinetic energy

Front 28

High-quality Energy

Back 28

The contrast between different forms of energy

Front 29

Inorganic Compounds

Back 29

Inorganic compounds are often classified as ionic and covalent

Front 30

Inputs

Back 30

Something put into a system or expended in its operation to achieve output or a result

Front 31

Kinetic Energy

Back 31

The energy of a body or a system with respect to the motion of the body or of the particles in the system

Front 32

Law of Conservation of Energy

Back 32

Energy may neither be created nor destroyed