Download Electric Circuits Fill in the Blanks

NAME ____________________________
DATE_________________________
CLASS ______________
_______
Chapter Year
Year 9 Electric Current
Complete the paragraphs using words from the box.
chemical reactions
voltmeter
electrical
electrons
battery
negative
ohms
positive
resistance
ammeter
volts
motor
copper wire
amperes
Life as we know it would be impossible without electricity. Think of the number of electrical devices
we rely on every day: lights, refrigerators, computers, televisions, flashlights, car headlights,
watches—the list is endless. All of these devices, and countless others, need a constant, steady source
of ________________ energy. This steady source of electrical energy comes from an electric current,
which is the steady flow of _______________ through a conductor.
This steady flow of electricity requires a closed path, or closed circuit through which to flow. Its
basic elements are a conductor, such as ___________________, through which electrons flow and a
source of electrons, such as a _____________ or power pack.
In a circuit, the electrons flow from the ________________ end to the _____________ end; however,
scientists and electricians draw arrows to show the current flow traditionally from positive to negative
end instead.
A familiar source of electrons in electric circuits is a battery. __________________________ actually
take place in the battery when it is connected in a circuit. This provides the energy necessary to push the
electrons. The flow of electrons create current in a circuit. The current can be measured by an
______________ or a multimeter in _________________ or Amps or A.
Each battery has the electrical energy known as voltage which can be measured a ________________ or
multimeter in units called _____________, which is abbreviated V. This electrical energy can be used
to make a light bulb or globe glows and a _____________ move.
However, the electrons don’t flow completely freely through the circuit. Depending on the material
used for the conductor, the electrons have more or less difficulty flowing. The measure of how difficult
it is for electrons to flow through a circuit is called
units called
. This is measured in
. The higher the resistance, the lower the current.