SCIENCE ~ CHAPTER 12
ENERGY AND MATERIAL
RESOURCES
Miss Nelson
SECTION 4
Energy Conservation
ANTICIPATORY SET
What are some examples of
wasting energy?
STANDARDS
S 6.3.a – Students know energy can be carried from
one place to another by heat flow or by waves,
including water, light and sound waves, or by moving
objects
S 6.3.b – Students know that when fuel is consumed,
most of the energy released becomes heat energy
THE BIG IDEA
What are two ways to
preserve our current
energy sources?
KEY TERMS
 Efficiency
 Insulation
 Energy conservation
ENERGY CONSERVATION
Although fossil fuels wont run out soon…
they also wont last forever
Most people think that it makes sense to
use fuels more wisely now to avoid
possible fuel shortages in the future
ENERGY CONSERVATION
One way to preserve energy
resources is to increase the
efficiency of energy use
Another way is to conserve
energy whenever possible
ENERGY CONSERVATION
Read Energy Conservation on page 499 of your
textbook
ENERGY EFFICIENCY
One way to make energy resources last
longer is to use fuels more efficiently
Efficiency is the percentage of energy
that is actually used to perform work
The rest of the energy is “lost,” usually as heat
HEATING AND COOLING
One method of increasing the efficiency of
heating and cooling systems is insulation
 A layer of material that raps air to help block heat
flow between the air inside and outside of a building
Trapped air can act as insulation in windows,
too
 Most windows consist of two panes of glass with
space between to act as insulation
LIGHTING
Must of the electricity used for home
lighting is waste!
Less than 10% of the energy that
incandescent light bulbs use is converted
into light
Why we are moving to non-incandescent
TRANSPORTATION
Engineers have improved the energy
efficiency of cars by designing better
engines and tires
Another way to save energy is to reduce
the number of cars on the road
ENERGY EFFICIENCY
Read Energy Efficiency on pages 500-501 of
your textbook
ENERGY CONSERVATION
Another approach to making energy resources
last longer is conservation
 Reducing energy use
You can reduce your energy use by changing
your behavior in simple ways
 Small changes, multiplied by millions of people, will
add up to a lot of energy saved!
ENERGY CONSERVATION
Read Energy Conservation on page 502 of your
textbook
CHECK FOR UNDERSTANDING
What are the two keys to preserving
our current energy resources?
CHECK FOR UNDERSTANDING
What are the two keys to preserving our current
energy resources?
The two keys to preserving our current energy
resources are increasing energy efficiency and
reducing energy use.
GUIDED PRACTICE
How does insulating buildings help to
preserve energy resources?
GUIDED PRACTICE
How does insulating buildings help to
preserve energy resources?
Insulating buildings helps to preserve the
amount of heat lost to the outside in cold
weather and helps keep heat outside in
warm weather, which reduces the amount
of fuel need to heat and cool buildings.
INDEPENDENT PRACTICE
Complete Energy 12-4 Independent
Practice