Download Energy

Bell Work:
1. What are some types of
energy?
Physical Science 02/13
Agenda:
Types of Energy
Forms of Energy WS
Learning Target:
I can describe the different types of
energy.
I can identify energy conversions.
1. What is the law of
conservation of energy?
Energy cannot be
created or destroyed,
only changed from one
type to another.
Homework/Important Dates:
○ KE & PE Ws Due 2/16
○ Energy Foldable Due
Thursday 2/23
○ Forms of Energy WS Due
Thursday 2/23
Physical Science
Notes
Forms of Energy
Energy
○Energy is the ability to do work or cause change.
○Every chemical or physical change in matter includes a
change in energy
○The law of conservation of energy says that energy
cannot be created or destroyed, only converted from
one form to another.
Forms of Energy
○Thermal energy is the
total energy of all the
particles in an object.
○Thermal energy always
flows from warmer matter
to cooler matter.
○Ice absorbs thermal
energy as it melts,
which is why it keeps
your drink cool.
○Changes in matter can
absorb thermal energy,
as above, or release it,
such as in a fire.
Forms of Energy
○Chemical energy is the energy
stored in the chemical bonds
between atoms.
○When a chemical change occurs,
bonds are broken and new bonds
are formed.
○When there is more energy
released from bonds being broken
than required to form new ones,
energy is released.
○When there is less energy
released from bonds being broken
than required to form new ones,
energy is absorbed.
Forms of Energy
○Electromagnetic energy,
also called radiant energy, is a
form of energy that travels as
waves.
○Examples.
○Visible light
○X-ray
○Radio waves
○Ultraviolet rays
○Changes in matter can give
off or be caused by
electromagnetic energy.
○For example, a microwave
oven can melt butter.
Forms of Energy
○Electrical energy is the
energy of electrically
charged particles moving
from one place to
another.
○For example, the
chemical energy in coal
is transformed into
electrical energy when it
is burned in a coal
power plant.
Forms of Energy
○Sound energy is a form of
energy associated with the
vibration or disturbance of
matter.
○When an object produces
sound, it vibrates the air
around it.
○Those vibrations can
transfer their energy,
causing the surface they
hit, such as our ear
drum, to vibrate.
○If there is no air to
transmit the vibrations,
there is no sound.
Forms of Energy
○Nuclear energy is released
by reactions within atomic
nuclei, as in nuclear fission or
fusion.
○When the nucleus splits
(fission), nuclear energy is
released in the form of heat
energy and light energy.
○Nuclear energy is also
released when nuclei collide
at high speeds and join
(fusion).
○Nuclear energy is the most
concentrated form of energy.
Forms of Energy
○Mechanical energy is the
energy resulting from the
motion and position of an
object.
○Mechanical energy moves
objects from place to place.
○The engine of a car uses
chemical energy to give the
car mechanical energy.
○Throwing a football is
giving the football
mechanical energy.
Kinetic or Potential?
○Energy can be separated into two
kinds: kinetic or potential.
○Kinetic energy is motion – the
motion of waves, electrons, atoms,
or substances.
○Electromagnetic, thermal, sound
and electrical are kinetic.
○Potential energy is stored energy
and the energy of position.
○Chemical and nuclear energy are
potential.
○Mechanical energy can be either
kinetic or potential or even both.
Energy Conversion
○Energy can be changed from
one form to another.
○Changes in the form of energy
are called energy
conversions.
○All forms of energy can be
converted into other forms.
○The sun’s electromagnetic
energy can be converted
directly into electricity through
solar cells.
○In a battery, chemical energy
is converted into electrical
energy.
Energy Conversion Practice
○Name the transfer:
1)
2)
3)
4)
Energy Sources
○Energy can come from renewable sources, which can
be re-used, or non-renewable sources, which cannot.
○Renewable sources include solar, geothermal, wind,
hydroelectric, tides or waves
○Non-renewable sources are the rest such as fossil fuels
(coal, oil, natural gas), or nuclear power.
Bell Work:
1. What is kinetic energy?
Physical Science 2/14
Agenda:
Kinetic vs. Potential Energy Lab
1. What is the formula for
kinetic energy?
1. What is gravitational
potential energy?
1. What is the formula for
gravitational potential
energy?
Learning Target:
I can describe how the potential and
kinetic energy of a falling object is
related.
Homework/Important Dates:
○ KE & PE Ws Due 2/16
○ Energy Foldable Due
Thursday 2/23
○ Forms of Energy WS Due
Thursday 2/23
○ Kinetic/Potential Energy Lab
due Friday 2/24
Kinetic / Potential Energy Lab
○You will be taking three objects that
you will drop from varying heights.
Using the data that you collect, you will
calculate the potential energy before
and the kinetic energy after the drop.
Our original mass is in g and we need to convert it to kg – divide by 1000
W = mg where mass is in kg and g = 10m/s2
Speed = distance / ave. time
P.E. = Wh (h = distance of drop)
K.E. = ½ mv2 (mass in kg)
Create your own data table:
Will not be doing the graph – strike it out ☺
In addition to collecting the data on the worksheet, you will need
to create a data table to record the height of the bounce for each
height.
Requirements:
1.
2.
3.
4.
Draw your data table using a ruler!!!!
Height of bounce for each trial.
Average bounce height for each drop height.
Units.
By end of period you need to have completed your mass, weight
and P.E. columns on the first data table and create your own data
table for height of bounce!!!!!
Bell Work:
Describe the energy
conversions in the situations
below:
1. A light bulb lights up.
1. A tree converts sunlight
to sugar.
Physical Science 02/15
Agenda:
Kinetic vs. Potential Energy Lab
Learning Target:
I can describe how the potential and
kinetic energy of a falling object is
related.
Homework/Important Dates:
1. A nuclear power plant
powers a house.
1. A bell is rung.
○ KE & PE Ws Due 2/16
○ Energy Foldable Due
Thursday 2/23
○ Forms of Energy WS Due
Thursday 2/23
○ Kinetic/Potential Energy Lab
due Friday 2/24
Our original mass is in g and we need to convert it to kg – divide by 1000
W = mg where mass is in kg and g = 10m/s2
Speed = distance / ave. time
P.E. = Wh (h = distance of drop)
K.E. = ½ mv2 (mass in kg)
Create your own data table:
Will not be doing the graph – strike it out ☺
In addition to collecting the data on the worksheet, you will need
to create a data table to record the height of the bounce for each
height.
Requirements:
1.
2.
3.
4.
Draw your data table using a ruler!!!!
Height of bounce for each trial.
Average bounce height for each drop height.
Units.
By end of period you need to have completed your mass, weight
and P.E. columns on the first data table and create your own data
table for height of bounce!!!!!
0.5m
Station 1
Station 2
Station 3
Station 4
Station 5
Station 6
Station 7
1.0m
1.5m
2.0m
Bell Work:
1. What sources of error
are there in this lab?
Name at least 2.
Physical Science 02/16
Agenda:
Energy Conversions WS
Work Time
Learning Target:
I can describe the different types of
energy.
I can identify energy conversions.
1. How could we eliminate
those sources of error?
Homework/Important Dates:
○ Energy Foldable Due Thursday
2/23
○ Forms of Energy WS Due
Thursday 2/23
○ Kinetic/Potential Energy Lab due
Friday 2/24
Bell Work:
What type of energy
conversion is represented in
each situation below?
1. A x-ray machine
Physical Science 02/17
Agenda:
Quiz
Weekly Assignments:
1. A car
1. A roller coaster
○Vocabulary
○Bell Work
○Energy Notes
○Forms of Energy Notes
○2.3 & 9.4 Book Notes
○K.E. & P.E. Work Sheet
Homework/Important Dates:
1. A bow and arrow
Vocab
Pendulum
Thermal Energy
Chemical Energy
Sound Energy
Electromagnetic Energy
Radiation
Electrical Energy
Nuclear Energy
Energy Transformation
Renewable energy