Transcript Electricity Review

Electricity Review
Forms of Energy
• Mechanical Energy
• Chemical Energy
What is the difference between
kinetic energy and potential
energy?
A. An object has potential energy because
of its position or condition. It has kinetic
energy when it is moving.
B. An object can go from having potential
energy to having kinetic energy but not
the reverse.
C. Living things have kinetic energy. Only
non-living things such as books can
have potential energy.
When does an object have the most
potential energy on a roller coaster?
A.
B.
C.
D.
When it is at the top of the roller coaster.
When it is going to the top.
On its way down the roller coaster.
Going up the second hump of the roller
coaster.
Kinetic and Potential Energy
Stored and Moving Energy
Energy makes everything happen and can
be divided into two types:
Stored energy is called potential energy.
Moving energy is called kinetic energy.
Kinetic and Potential Energy Video
Clip (2 min)
Kinetic Video Clip (45 sec)
Potential Video Clip (45 sec)
With a pencil, try this example to know the
two types of energy.
Put the pencil at the edge of the desk and
push it off to the floor. The moving pencil
uses kinetic energy.
Now, pick up the pencil and put it back on
the desk. You used your own energy to lift
and move the pencil. Moving it higher than
the floor adds energy to it. As it rests on the
desk, the pencil has potential energy. The
higher it is, the further it could fall. That
means the pencil has more potential energy.
What happens when you throw a
baseball?
A.
B.
C.
D.
You give it thermal energy
You give it kinetic energy
You give it potential energy
You give it chemical energy
What is elastic potential energy?
A. Energy stored as a result of the
deformation of an object such as a
spring.
B. Energy that goes in and out.
C. Energy that stretches to numerous
objects.
D. Energy that bounces back.
Energy can not be created or
destroyed, only changed from one
form to another is the law of…
A.
B.
C.
D.
Energy Review
Thermal Energy
Preservation of Energy
Conservation of Energy
In series circuit with two lights,
what happens if one bulb goes out?
A.
B.
C.
D.
The other bulb stays lit.
All bulbs go out.
Nothing happens.
The battery is dead.
Series Circuit
The lights in our classroom are
wired in what type of circuit?
A.
B.
C.
D.
Open
Series and Parallel
Series
Parallel
Parallel Circuit
What is a pathway along which
electrons flow called?
A.
B.
C.
D.
Switch
Current
Circuit
Resistor
The flow of energy in an electrical
circuit is referred to as…
A.
B.
C.
D.
Circuit
Conductor
Electromagnet
Current
What form of energy gives us
direction?
A.
B.
C.
D.
Electrical Energy
Thermal Energy
Solar Energy
Magnetic Energy
What is an electromagnet?
A. An electric field that attracts objects
similar to the way a magnet attracts
metal objects.
B. A coil of current conducting wire
wrapped around an iron bar.
C. A very large magnet.
D. A magnetic field that is produced when
static electricity builds up in the
atmosphere.
How does the number of times a wire is
wound around an iron core affect the
amount of iron filings the electromagnet will
pick up?
A.
B.
C.
D.
Increase
Decrease
Nothing
Stays the same.
Number of Winds
Number of Filings
2
1
10
3
14
4
18
5
40
11
How is an electromagnet different
from a bar magnet?
A. The electromagnet can be turned on and
off.
B. The bar magnet can pick up most metal
objects.
C. The electromagnet can pick up iron
filings.
D. The bar magnet has a magnetic field.
Which of the following is attracted
to a magnet?
A.
B.
C.
D.
Metal
Gold
Aluminium
Plastic
Electromagnets
Lighting illustrates A.
B.
C.
D.
A build-up of electrons in the air
A build-up of heat
Heat flow
How the ground can become a
temporary electromagnet.
Static Electricity
What do rubber, plastic and glass
have in common?
A. They are all good insulators
B. They are all good conductors of
electricity.
C. They can all be turned in to magnets.
D. They are all capable of building up static
electricity.
Which group contains items that
could all conduct electricity to
complete the circuit?
A.
B.
C.
D.
Rubber Ball, Plastic Comb, Nail
Paper Clip, Penny, Iron Screw
Cork, Dollar Bill, Tweezers
Pencil, Eraser, Spoon
Conductors & Insulators
What does a toaster, light bulb,
radio, computer have in common?
A. They have to be replaced often.
B. They all convert electricity to heat.
C. They all convert electricity to different
forms of energy.
D. They are all forms of static electricity.
What causes chemical energy to
be changed to electric energy in a
flashlight.
A.
B.
C.
D.
Inserting the batteries.
The heating of the light bulbs filament.
Flipping on the switch.
Screwing on the top so that the batteries
form a connection.
Converting Energy
The type of energy created by the
sun is called…
A.
B.
C.
D.
Magnetic Energy
Solar Energy
Electrical Energy
Sound
Solar Energy
What kind of circuit is this?
A.
B.
C.
D.
Series
Parallel
Current
Circuit
In this type of circuit, what happens
when a bulb is removed?
A.
B.
C.
D.
All bulbs stay lit.
The battery goes dead.
The third bulb disappears.
All bulbs go dead.
What type of circuit is this?
A.
B.
C.
D.
Light Energy
Series
Current
Parallel
Why won’t this circuit light?
A.
B.
C.
D.
There is a conductor in the way.
There is an insulator in the way.
The battery is not hooked up right.
The light bulb is burned out.
Why can’t a parallel circuit be used
to test materials for conductors?
A. There are too many bulbs.
B. When you take one part of the circuit out
the others stay lit.
C. When you take one part of the circuit out
all others turn off.
D. Circuits can’t be tested.