22. POTENTIAL ENERGY
2) An object that is lifted
from its position on Earth
gravitational!
has __________ potential
Energy which depends on
height!
______ and mass!
22
31. Law of Conservation of
ENERGY: (same for mass)
Can’t be made
Mass/ NRG ____________
Mass/ NRG ______________
Can’t be destroyed
Mass/ Energy can only
__________
Change form!!!
32. DURING ENERGY CHANGES,
IF ONE BODYIS LOSING ENERGY,
Gaining
THE OTHER IS _______ ENERGY:
THE WAVE LOSES
ENERGY:
THE SAND
GAINS
ENERGY
33. DURING ENERGY CHANGES,
IF ONE BODYIS LOSING ENERGY
THE OTHER IS GAINING ENERGY:
THE WAVE LOSES
ENERGY:
THE SAND
GAINS
ENERGY
34. DURING ENERGY CHANGES
THE TOTAL ENERGY
REMAINS THE SAME
ENERGY ALWAYS FLOWS
FROM
HIGH TO LOW (source to sink)
38. WHEN WILL THE EXCHANGE
OF ENERGY STOP?
WHEN
EQUILIBRIUM
IS REACHED
THE LIQUID AND
THE ICE REACH
THE SAME
TEMPERATURE
39. UNUSABLE ENERGY:
Very often during the energy
transformation process,
heat!
some ____ energy is
produced due to friction.
This is wasted energy and
is lost to the environment.!
39
78. Measuring
Specific Heat
Energy can be measures in
many different ways.
Typical units include:
Joules
____________________,
_________________, &
Watts
calories
___________________
79. The term “Joule” is
named after English
Scientist James
Prescott Joule who lived
from 1818 to 1889. He
discovered that Heat is
a type of Energy!
1,000 joules =1 kilojoule
= 1 Btu
80. Do Now!
Read the did you know and
complete practice questions
1-10!
81. 1. What substance has
the highest specific
heat? Use your
Reference Tables
Liquid water
4.18 Joules/gramºC
82. 2. Why do metals
have low specific
heats?
They are
solid
83. 3. Why are pans made of
metals with low specific
heats?
Because metals are good
Conductors And have low
specific heats.
Therefore they will heat
up quickly and cook
your food faster.
84. 4. Which would
Take more energy
to raise its
Temperature, water
Or land?
water
86. Water (liquid) = 4.18
Iron (Fe) = 0.45
Copper (Cu) = 0.38
6. Which of these three
substances will heat up
fastest?
Copper because it has the
lowest specific heat
87. 7. Which material would
require the greatest amount
of heat energy to raise its
temperature from 50 C to 100 C?
A. 10 grams of granite
B. 10 grams of ice
C. 10 grams of lead
D. 10 grams of iron
88. 8. Which pan would you use
if you wanted to cook your food
quickly?
copper iron
Cp = 0.38 Cp = 0.45
89. 9. Which material would
require the greatest amount
of heat energy to raise its
temperature from 50 C to 100 C?
A. granite
B. ice
C. lead
D. iron
90. 10. Calculate how many joules would
be required to raise 3 grams of
water from 50 C to 65 C.
3 x15x 4.18 =
=188.1j
94. Motion How is it Does it have Volume?
(Kinetic bonded? A definite
energy) shape?
Solid Little
K.E.
Molecules Strong yes yes
vibrate
More
Liquid K.E. Not
Molecules bonded no yes
move
freely rigidly
Most
Gas K.E. Not no no
Molecules
move
bonded
fast
95. What are the changes of phase called?
FREEZING
solid liquid
MELTING
CONDENSATION
liquid gas
VAPORIZATION
96. 2. ENERGY IS RELEASED (lost)
DURING:
FREEZING
SOLID LIQUID
CONDENSATION
LIQUID GAS
from higher K.E. to lower K.E.
97. 3. ENERGY IS ABSORBED (gained)
DURING:
MELTING
SOLID LIQUID
VAPORIZATION
LIQUID GAS
from lower K.ETo higher K.E.
98. Energy stored during a phase
change is called
Latent heat
__________________
No change in
temperature
98
104. 1. Which phase changes release
energy?
freezing & condensation
2. Which phase changes absorb
energy? Vaporization
& melting
3. Which phase has the
most K.E.?
GAS (STEAM)
105.
106. The Earth is always trying
to achieve Equilibrium
Energy is constantly being
re-distributed flowing
from source to sink
110. All matter radiates
some
_____________
Electromagnetic
_____________
Energy
111. The sun emits energy
in _____
ALL
wavelengths
of the
electromagnetic
spectrum
112. ELECTROMAGNETIC SPECTRUM:
REFERENCE TABLE PAGE 14
10-10 10-8 10-6 10-4 10-2 10 0 10 2 10 4
gamma X ray Microwaves
Ultra Infrared
violet
Radio waves
Increasingwavelength
Decreasingwavelength
visible
Violet Blue Green Yellow Orange Red
113. Each type of energy differs
in its wavelength
__________
10-10 10-8 10-6 10-4 10-2 10 0 10 2 10 4
gamma X ray Microwaves
Ultra Infrared
violet
Radio waves
Increasingwavelength
Decreasingwavelength
visible
Violet Blue Green Yellow Orange Red
114. A wavelength is the distance
between two crests of the wave.
118. The Ozone layer is found
in the
stratosphere
_________________
layer of the
atmosphere.
119. 10-10 10-8 10-6 10-4 10-2 10 0 10 2 10 4
gamma X ray Microwaves
Ultra Infrared
violet
Radio waves
Increasingwavelength
Decreasingwavelength
visible
Violet Blue Green Yellow Orange Red
120. ELECTROMAGNETIC SPECTRUM:
REFERENCE TABLE PAGE 14
10-10 10-8 10-6 10-4 10-2 10 0 10 2 10 4
gamma X ray Microwaves
Ultra Infrared
violet
Radio waves
Increasingwavelength
Decreasingwavelength
visible
Violet Blue Green Yellow Orange Red
121. SHORT
WAVE LENGTHS ARE MOSTLY
ABSORBED by THE OZONE IN
THE STRATOSPHERE
gamma, X-RAYS
OZONE
122. ELECTROMAGNETIC SPECTRUM:
REFERENCE TABLE PAGE 14
10-10 10-8 10-6 10-4 10-2 10 0 10 2 10 4
gamma X ray Microwaves
Ultra Infrared
violet
Radio waves
Increasingwavelength
Decreasingwavelength
visible
Violet Blue Green Yellow Orange Red
123. SHORT
WAVE LENGTHS ARE MOSTLY
ABSORBED by THE OZONE IN
THE STRATOSPHERE
gamma, x-rays, UV
OZONE
124. ELECTROMAGNETIC SPECTRUM:
REFERENCE TABLE PAGE 14
10-10 10-8 10-6 10-4 10-2 10 0 10 2 10 4
gamma X ray Microwaves
Ultra Infrared
violet
Radio waves
Increasingwavelength
Decreasingwavelength
visible
Violet Blue Green Yellow Orange Red
125. This energy is absorbed
by Earth’s surface, which
in turn reradiates the
energy in the form of
heat called
infrared
________________
radiation
128. ELECTROMAGNETIC SPECTRUM:
REFERENCE TABLE PAGE 14
10-10 10-8 10-6 10-4 10-2 10 0 10 2 10 4
gamma X ray Microwaves
Ultra Infrared
violet
Radio waves
Increasingwavelength
Decreasingwavelength
visible
Violet Blue Green Yellow Orange Red
129.
130. 10-10 10-8 10-6 10-4 10-2 10 0 10 2 10 4
gamma X ray Microwaves
Ultra Infrared
violet
Radio waves
Increasingwavelength
Decreasingwavelength
visible
Violet Blue Green Yellow Orange Red
131. Sun emits all
Infrared: wavelengths
Heat energy that
Earth re-radiates
132. How does too
Much CO2 contribute to
Global warming?
CO2
H2 0 VAPOR
INFRARED
METHANE GAS
CO2 absorbs
infrared
134. 1. ABSORBTION - UV ABSORBED by
OZONE IN STRATOSPHERE
INFRARED ABSORBED BY CO2&H2O vaporoxide
methane, nitrous
2. REFLECTION - BY CLOUDS, ICE,
SNOW & WATER
3. SCATTERING - BY AEROSOLS,
WATER DROPLETS, ICE CRYSTALS,
AIR POLLUTANTS, DUST, POLLEN
4. LIGHT IS BENT AS IT
REFRACTION MOVES THROUGH
VARIED DENSITIES
5. TRANSMISSION WHEN ENERGY
PASSES THROUGH
A MEDIUM
138. Reflection vs. Absorption & Radiation
Color:
Light (white) reflects
dark (black) absorbs
Texture:
Rough surface absorbs
smooth surface reflects
139. Absorption
Good absorbers are also good re-radiators.
What type of surface is the best absorber?
– Dark Pavement warms before
– Rough grassy lawns.
What type of surface is the best reflector of
radiation?
– Light Snow and Ice reflect
– Shiny insolation and remain
– Flat cold.
140.
141. ELECTROMAGNETIC SPECTRUM:
LAB
10-10 10-8 10-6 10-4 10-2 10 0 10 2 10 4
gamma X ray Microwaves
Ultra Infrared
violet
Radio waves
Decreasing wavelength Increasing wavelength
visible
Violet Blue Green Yellow Orange Red
143. Greenhouse Effect
Short wavelength visible light enters the greenhouse, is
absorbed, then re-radiated as longer wavelength infrared
(heat). The glass traps the infrared.
144. What is Global Warming?
increase
An ___________ in
the Earth’s
Average surface
air temperature
146. THE GREENHOUSE
EFFECT
HEAT IS
TRAPPED BY
THE GLASS OF
THE GREENHOUSE
Incoming is
Short wave
outgoing is Ex: Visible light
Longer wave
Infrared
146
Energy absorbed
147. Short wave radiation
Visible light
like ___________
passes through the
glass of a greenhouse
and is
absorbed
_______________ by
the objects inside the
greenhouse.
147
148. These objects
reradiate
__________________
the energy as
infrared Long Wave Radiation
___________________
_, which get reflected
back into the
greenhouse and warms
the air.
148
149. In Earth’s atmosphere,
there are many gases
that act like the glass
of a greenhouse and
trap
________ long-wave
radiation, keeping it in
the Earth’s Atmosphere.
These are known as…
149
151. Greenhouse Effect
CO2 and H2O absorb
infrared that is re
-radiated from the surface
of the Earth. Therefore,
holding that heat in the
atmosphere and raising the
global temperature.
152. What are the Greenhouse gases?
H2 0 VAPOR
CO2
METHANE GAS
INFRARED
Ozone
CFCs
153. Without some greenhouse
gases, the Earth would
cold
be too _____________
for us to survive. But an
overload of greenhouse
gases creates a problem
as well!
154. How does too
Much CO2 contribute to
Global warming?
CO2
H2 0 VAPOR
INFRARED
METHANE GAS
CO2 absorbs
infrared
155. Greenhouse Effect
What human activities
contribute to CO2
production and an increase
in the greenhouse effect?
– Burning of fossil fuels
– Global deforestation
156. If present trends continue
possible effects may include
Rising sea levels due to melting
polar ice caps;
Increasing frequency and
severity of storms and
hurricanes;
More frequent heat waves and
droughts; and
Relocation of major crop
growing areas.
157. Which of the following best represents
the type of energy
received by the Earth
and the re-emitted by the Earth?
A B c
158. Which of the following best represents
the type of energy
received by the Earth
and the re-emitted by the Earth?
A B c
159. WHICH TYPE OF ENERGY IS
REPRESENTED
BY THE RADIATION AT B?
A) INSOLATION
C) VISIBLE LIGHT
B) ULTRAVIOLET B
A
D) INFRARED ENERGY
160. WHICH TYPE OF ENERGY IS
REPRESENTED
BY THE RADIATION AT B?
A) INSOLATION
C) VISIBLE LIGHT
B) ULTRAVIOLET B
A
D) INFRARED ENERGY
161. What is a NON-RENEWABLE
RESOURCE?
An energy resource !
that is
Being used faster
________________
than Earth Produces
________________
it!
_______.!
161
162. What is a NON-RENEWABLE
RESOURCE?
Examples:!
Fossil Fuels, minerals!
__________________! 162
163. What is a NON-RENEWABLE
RESOURCE?
To make our non-
renewable resources
last longer we can
Reduce!
________________
Reuse!
________________
Recycle!
_____________.! 163
164. What is a RENEWABLE
RESOURCE?
An energy resource !
that is
Earth supplies faster
________________
than we use it
________________
“unlimited”!.!
_______
164
165. What is a RENEWABLE
RESOURCE?
Examples:
Solar, wind, biomass
________________
(trees etc..)!
_______________! 165
166. What is a RENEWABLE
RESOURCE?
A renewable resource
produces less
_________ (substance
pollution!
that can harm living
things and/or the
environment! 166
167. Look at the pie
graph!!!
Only 7% of our energy consumption
is from renewable resources!!! Try
to make little changes in your life
to reduce your dependence on
Non-Renewable Resources!
What do you plan to do?