Transcript Electricity - SCHOOLinSITES

Circuits
Energy Materials Landforms More Circuits
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What is the constant flow
of
electrons through a wire?
Current!
Which circuit has more than one
path for the current to travel?
series
parallel
Parallel
(This series circuit has
ONLY one path)
(This circuit has MORE
than one path.)
What kind of circuit has only only
ONE path
for the current to travel?
Series circuit!
If one light burns out,
all lights turn off.
If one bulb on a strand of Christmas lights
burns out but the other lights stay lit,
you know that the strand of lights is on what
kind of circuit?
Parallel circuit
One bulb can burn out and the rest will stay on!
All bulbs have
their own path
of wire back to
the power source.
What is the device used
to open and close a circuit?
a switch
What kind of energy are radios designed
to produce for our listening enjoyment?
Sound energy
Sonic boom as a jet goes
through the
sound barrier.
What is the most noticeable energy
produced when you plug in and
turn on a lamp?
LIGHT ENERGY
(and also some heat energy)
Turning off the lights and T.V.
when you leave a room is a
way to save energy or ______ it.
conserve energy.
Sometimes in a closed circuit special metals
like tungsten become hot and some of the
thermal (heat) energy is transferred to the
air as radiation which produces ______. An
example is the filament inside a bulb.
light
A ceiling fan (mechanical),
a toaster (thermal), and even
a computer require _______
energy to operate.
electrical energy
(And these things do not
use electricity:
can opener,
books, pencil, and
chalk board.)
What is the component
in a circuit that allows a
current to pass through easily?
Conductor (wire)
copper wire
aluminum wire
What are materials that electricity
does NOT flow through easily and
prevents the current from escaping?
INSULATION
Rubber or plastic is used as a covering
for the wires of an electrical cord because
they are both known to be ___________.
insulators
Insulated wire
What is a substance used to
make most electrical wiring
because it is known to be a
good conductor of electricity?
Pennies are also made of this.
Copper!!
The base of a light bulb is made
of metal because metal is a
good _______ of electricity.
base
conductor
base
What is the geological feature
of the Earth that can be found
covering vast areas of the North
and South Poles?
Ice
Caps
North Pole
Continent of Antarctica
at the South Pole
What is a break in the crust of the
Earth along which rock moves?
A fault
Notice the river on the Before Faulting picture.
In the ocean, what slopes gently down
beneath the surface of the water at the edge
of a continent? (It is the shallow part of the
ocean near the coast or sandy beach.)
Continental shelf
What do we call underwater
mountains in the ocean?
Ocean Ridges
Ridges
Notice the ridge
of mountains
between the
Americas and
Europe & Africa.
What kind of land is high
and (mostly) flat?
Plateau
Rhymes with “bad toe”
An electromagnet needs an
____________ ____________
to produce a magnetic field.
electric current
current
The current magnetizes the nail. It can be turned on and off with
a switch. Because of this, we are able to make motors that turn. Picture the
nail spinning as it repels and is attracted to the magnet around it.
For this gadget to work
correctly, it must have a battery,
a switch, a light bulb, and a
conductor (wire). What is it?
Hints: It is on a series circuit. The
British call it a torch!
A flashlight!
What is necessary for a flashlight
to operate because it provides
the energy?
The battery,
also called an electric or dry cell.
It changes chemical energy into electrical energy.
Sometimes an electric charge builds up on a
material. Walking across a carpet or
rubbing a balloon can cause….
static electricity
This is a model of an atom. Matter
(solids, liquids, and gases) is made
of atoms. The middle part has protons
(positive charge) and the spinning around
parts are electrons (negative charge). When
we spin conductors (wire) through the magnetic
field of magnets, we get a flow of electrons
called _______________.
electricity!