9 Bio

Ecosystem

A community of organisms, their physical environment, and the interaction that happens between them.

Community

All of the populations of different species that live in the same area and interact with one another.

Population

A group of individuals of the same species living in one area at one time.

Adaptation

A feature that enhances an organism's chance of survival.

Symbiosis

An interspecific interaction in which the different species live together in a long term relationship.

atom

the basic unit of matter and the smallest particle that retains its characteristics in a chemical reaction

charge separation

the imbalance of charges between two locations (also known as 'static electricity')

conductor

a material that has free electrons and allows electrons to flow through it

electric current

the flow of charges from one location to another, measured in amperes (A)

electrical resistance

the opposition to electron flow provided by a material, measured in ohms (Ω)

elementary charge

the size of the charge of a single electron or proton

EMF

the energy (per unit charge) provided to a circuit by a power source, measured in volts (V)

energy

the ability to do work, measured in joules (J)

free electron

an electron that is not tightly held by its nucleus

insulator

a material that does not have free electrons and typically does not allow charge to flow through it

ion

a particle that has a positive or negative charge

load

any part of an electrical circuit that transforms electrical potential energy into another kind of energy

potential difference

the energy (per unit charge) transformed by a load, measured in volts (V)

power

the amount of energy that is transformed by a load every second

resistor

an object that resists the flow of electrons