Download 8th Grade Exploring Energy

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8
Grade Exploring Energy
EQ: How can energy create a change?
Height Ball is Dropped from
Ball A
Ball B
10 cm
Ball hits the ground and
bounces up and down
about 13 times losing
height each time until it
begins to roll and stops.
Ball hits ground with a
thud and stays there. It
does not bounce back.
It does not even roll.
30 cm
Ball hits the ground and
bounces higher than it
did at 10 cm but never
as high as the dropping
height. It bounces about
16 times before
beginning to roll to a
stop.
Ball still does not bounce
back.
It seems like it is stuck to
the ground when it hits.
. Ball A and Ball B are made of different materials.
Because Ball A bounced and Ball B did not
1
Substance
Volume
(cm³)
Mass (g)
Density=mass/volume(g/cm³)
Ball A
9cm³
8.0 g
0.89g/cm³
Ball B
9cm³
11.0 g
1.22g/cm³
2. The balls are not made up of the same material. The two
substances do not have the same densities.
D
C
B
A
E
Explain
1.Potential Energy is greatest in position D
2.Kinetic Energy is lowest in position D
3.Kinetic Energy is greatest in position E
4.C Position has slightly more potential
energy than position B
Elaborate:
____________ is defined as
the ability to do work or
cause change. While it
can be______________from
one object or system to
another, energy cannot
be_________ or destroyed.
Elaborate:
Energy is defined as the
ability to do work or
cause change. While it
can be ____________ from
one object or system to
another, energy cannot
be ________ or destroyed.
Elaborate:
Energy is defined as the
ability to do work or
cause change. While it
can be transferred from
one object or system to
another, energy cannot
be ________ or destroyed.
Elaborate:
Energy is defined as the
ability to do work or
cause change. While it
can be transferred from
one object or system to
another, energy cannot
be created or destroyed.
This rule is
known as the
law of
_____________of
energy. Energy
exists in several
different ______.
This rule is
known as the
law of
conservation of
energy. Energy
exists in several
different______.
This rule is
known as the
law of
conservation of
energy. Energy
exists in several
different forms.
One form of energy, thermal energy, is produced
by the movement of atoms, ions and molecules.
The more the ________ of an object
move, the greater the thermal
energy will be.
The more the particles of an object
move, the greater the thermal
energy will be.
Thermal energy can be transferred
as _____ from warmer objects to
________ objects. When this transfer
occurs, the _____________ of both
objects will change.
Thermal energy can be transferred
as heat from warmer objects to
________ objects. When this transfer
occurs, the _____________ of both
objects will change.
Thermal energy can be transferred
as heat from warmer objects to
cooler objects. When this transfer
occurs, the _____________ of both
objects will change.
Thermal energy can be transferred
as heat from warmer objects to
cooler objects. When this transfer
occurs, the temperature of both
objects will change.
Other forms of energy include: Electrical
energy which is produced by the flow of
electrons, _________ energy stored in the
bonds of molecules, ____ energy which travels
as electromagnetic waves, sound energy
which travels as _________ waves, __________
energy which comes from the fission (splitting
apart) or fusion (combining) of the nuclei of
atoms, and mechanical energy which is used
by _________ objects.
Other forms of energy include: Electrical
energy which is produced by the flow of
electrons, chemical energy stored in the
bonds of molecules, ____ energy which travels
as electromagnetic waves, sound energy
which travels as _________ waves, ________
energy which comes from the fission (splitting
apart) or fusion (combining) of the nuclei of
atoms, and mechanical energy which is used
by _________ objects.
Other forms of energy include: Electrical
energy which is produced by the flow of
electrons, chemical energy stored in the
bonds of molecules, light energy which travels
as electromagnetic waves, sound energy
which travels as ___________ waves, ________
energy which comes from the fission (splitting
apart) or fusion (combining) of the nuclei of
atoms, and mechanical energy which is used
by ________ objects.
Other forms of energy include: Electrical
energy which is produced by the flow of
electrons, chemical energy stored in the
bonds of molecules, light energy which travels
as electromagnetic waves, sound energy
which travels as mechanical waves, nuclear
energy which comes from the fission (splitting
apart) or fusion (combining) of the nuclei of
atoms, and mechanical energy which is used
by ________ objects.
Other forms of energy include: Electrical
energy which is produced by the flow of
electrons, chemical energy stored in the
bonds of molecules, light energy which travels
as electromagnetic waves, sound energy
which travels as mechanical waves, nuclear
energy which comes from the fission (splitting
apart) or fusion (combining) of the nuclei of
atoms, and mechanical energy which is used
by moving objects.
Mechanical energy is the sum of _____________ energy and kinetic
energy. Potential energy is ____________________ energy due to an
objects position.
Mechanical energy is the sum of potential energy and kinetic
energy. Potential energy is _______________energy due to an
objects position.
Mechanical energy is the sum of potential energy and kinetic
energy. Potential energy is stored energy due to an objects
position.
For example, water
behind a dam has
potential energy due
to its ability to fall to a
lower level. Potential
energy is converted
into ________________, or
the energy of
motion.
For example, water
behind a dam has
potential energy due
to its ability to fall to a
lower level. Potential
energy is converted
into kinetic energy, or
the energy of
motion.
When energy moves from
one object to another it is
often ____________ into a
different form of energy.
For example, electrical
energy is transferred to
the light bulb of a lamp
where it is transformed
into light energy and
___________ energy (heat).
When energy moves from
one object to another it is
often transformed into a
different form of energy.
For example, electrical
energy is transferred to
the light bulb of a lamp
where it is transformed
into light energy and
___________ energy (heat).
When energy moves from
one object to another it is
often transformed into a
different form of energy.
For example, electrical
energy is transferred to
the light bulb of a lamp
where it is transformed
into light energy and
thermal energy (heat).
Another example can be
found in a moving car.
Chemical energy from the
gasoline is transformed
into mechanical energy
when the car moves. This
transformation is not 100%
_______, which means that
much of the energy is
transformed into thermal
energy and cannot be
used to move the car.
Another example can be
found in a moving car.
Chemical energy from the
gasoline is transformed
into mechanical energy
when the car moves. This
transformation is not 100%
efficient, which means
that much of the energy is
transformed into thermal
energy and cannot be
used to move the car.
Identify the forms of energy that occur in each
stage of energy transformation when a coal fired
power plant supplies electricity to a street light
1
2
3
4
5
Burning
Coal
Boil
Water
Turn
Turbine
Goes to Lights
power
Street
line
lamps
Identify the forms of energy that occur in each
stage of energy transformation when a coal fired
power plant supplies electricity to a street light
1 Chemical
2
3
4
Burning
Coal
Boil
Water
Turn
Turbine
Goes to Lights
power
Street
line
lamps
5
Identify the forms of energy that occur in each
stage of energy transformation when a coal fired
power plant supplies electricity to a street light
1 Chemical
2 Thermal
3
4
Burning
Coal
Boil
Water
Turn
Turbine
Goes to Lights
power
Street
line
lamps
5
Identify the forms of energy that occur in each
stage of energy transformation when a coal fired
power plant supplies electricity to a street light
1 Chemical
2 Thermal
3
4
Burning
Coal
Boil
Water
Turn
Turbine
Goes to
Lights
power
Street
line
lamps
5
Mechanical
Identify the forms of energy that occur in each
stage of energy transformation when a coal fired
power plant supplies electricity to a street light
1 Chemical
2 Thermal
3 Mechanical
4 Electrical
Burning
Coal
Boil
Water
Turn
Turbine
Goes to
Lights
power
Street
line
lamps
5
Identify the forms of energy that occur in each
stage of energy transformation when a coal fired
power plant supplies electricity to a street light
1 Chemical
2 Thermal
3 Mechanical
4 Electrical
Burning
Coal
Boil
Water
Turn
Turbine
Goes to
Lights
power
Street
line
lamps
5 Light