This is a glossary of words that relate
to electricity and trees. Many of these words are used in the SafeTree
website and/or in the SafeTree booklet.
A measurement of the amount of electric current.
The smallest unit of matter. Scientists so far have found
112 different kinds of atoms. Everything in the world is made of
different combinations of these atoms.
The outer covering of a tree that protects it from bad weather,
fire, insects, and fungi.
A thin layer of cells inside a tree that produce phloem on
one side and sapwood on the other.
A closed loop of conductors that allows current to flow
from a power source and back.
Something that allows electricity to flow through it easily.
Water and most metals are good conductors. The reason conductors
allow electricity to flow through them is because the electrons
in their atoms move between atoms very easily.
The movement or flow of electricity.
The science of tree rings.
Power lines that carry electricity through neighborhoods
to homes and businesses. Distribution lines can run overhead or
The flow of electrons.
The basic particle that orbits the nucleus of an atom. The
flow of electrons produces electricity.
The ability to do work. People get energy from food. Your toaster
and your washing machine get their energy from electricity.
Everything that surrounds and affects living beings.
A machine that converts mechanical energy into electrical energy.
Old cells inside a tree that give it strength.
Something that does not allow electricity to flow through
it easily. Glass and special rubber are good insulators. The reason
insulators do not allow electricity to flow through them easily
is because the electrons in their atoms do not move from atom to
atom very easily.
The inner bark of a tree that moves sap down from the leaves
to all the parts of a tree.
The process by which trees and green plants capture the sun's
energy and turn it into glucose, the fuel the tree or plant needs
to grow. In the process, carbon dioxide is absorbed from the air
and oxygen is given off.
The central core of a tree.
A place where electricity is generated.
A wire used to carry electricity. Power lines are located
high overhead or buried underground.
The younger wood of a tree through which the raw sap rises from
the roots to the leaves.
The wire that carries electricity from a power pole to a
A facility where transformers lower electricity's voltage.
A device used to increase or decrease electricity's voltage.
Power lines that carry high-voltage electricity long distances.
Power lines that are buried beneath the ground.
A company or other organization that provides a public service,
such as supplying electricity, natural gas, or water.
A measure of the pressure under which electricity flows.
A measure of the amount of work done by a certain amount or amperage
of electric current at a certain pressure or voltage.
The part of a tree that carries water from the roots up to the leaves
forms the wood of the tree.