4 th Grade Core Knowledge Science : Electricity Quiz

Review  ________ is everything around you.  Matter is composed of __________.  _______ are the smallest unit of an element.  Atoms are made of smaller subatomic particles-________ (+ charge), ________ (no charge), and ________ (- charge).

Review  Matter is everything around you.  Matter is composed of elements.  Atoms are the smallest unit of an element.  Atoms are made of smaller subatomic particles-protons (+ charge), neutrons (no charge), and electrons (- charge)

More notes on atoms:  Protons are positively charged (+) and found in the ______ (the center).  _______ do not hold a charge (neutral) and are found in the nucleus.  Electrons are negatively charged and spin _______the nucleus.

More notes on atoms:  Protons are positively charged (+) and found in the nucleus (the center).  Neutrons do not hold a charge (neutral) and are found in the nucleus.  Electrons are negatively charged and spin around the nucleus.

The movement or flow of an electrical charge, usually through an electrical circuit

Electric Current

A flow of electrons

Current

The build up of an electrical charge

Static Electricity

An amount of electricity caused by having too few or too many electrons

Charge

Material that does not allow an electric current to flow  Example: plastic, glass, rubber, and wood.

Insulators

Energy made available by the flow of an electric charge through a conductor

Electricity

A negatively (-) charged particle that spins around the nucleus of an atom

Electron

A magnet formed by a current passed through a wire coiled around a core magnetic material; the current magnetizes the core

Electromagnet

Material that readily allows an electric current to flow.  Example- copper and silver

Conductor

A path through which an electric current can flow

Electric Circuit

A circuit that is not closed, or complete, and therefore DOES NOT allow electricity to flow

Open circuit

A safety feature in an electrical circuit that interrupts the circuit if the circuit goes beyond a safe level.

Fuse

An accidental connection of low resistance made between points in a circuit in which electric currents can flow; it prevents the circuit from working as it is supposed to work.

Short circuit

A complete path through which electricity can flow

Closed Circuit