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GEOTHERMAL
ENERGY
OBJECTIVES
At the end of the lesson, students should be able to;
a) Describe the Geothermal energy,
b) create a flow chart to describe how energy is
transformed to generate electricity in a geothermal
power plant, and
c)cite the importance of Geothermal energy in humans'
lives.
“ENERGY THAT COMES WITHIN”
 The
class will be divided into three
groups. Each group will receive an
activity sheet.
 Each group has designated task.
• Each group will write their answers or
put their work on the manila paper.
•You only have 10 minutes to do the
activity
• Present your work in in the class.
Group 1-Explain what the picture is all about
Group 2- Label the parts of the geothermal
power plant that generate electricity
Group 3 -Create a flowchart to describe how
geothermal energy is transformed to generate
electricity in a geothermal plant
•The
steam spins in a turbine, which is
connected to a generator that produces
electricity
•Cooling
water cools the steam which it
condenses back to water
• When the water reaches the surface, the
drop in pressure causes the water to turn
into steam
• Wells
are well dripped deep into the
Earth to pump steam or hot water to the
surface
• The cooled water is pumped back into the
earth to begin the process again
Rubrics
5
All
4
concepts
Content correctly defined
3
are There are one or two There
are
three
or
more
concepts that are not concepts that are not correctly
correctly defined.
defined.
All words are correctly There are one to three There are four or more words that
Delivery pronounced.
words
that
are are mispronounced.
mispronounced.
Teamwork All
participated.
members There
are
three There are four and more
members who didn't members didn’t cooperate.
cooperate.
GEOTHERMAL ENERGY
Geothermal energy comes
from the Greek word “Geo”
means earth and “Therme”
means heat.
Geothermal energy is a heat
energy from the Earth.

References: https://www.thinkgeoenergy.com/thinkgeoenergys-top-10-geothermal-countries-2022-power-generation-capacitymw/#:~:text=Here%20the%20Top%2010%20geothermal,small%20binary%20plant%20at%20Lahendong
Magma
heats
nearby
rocks
and
underground aquifers. Hot water can be released
through geysers, hot springs, steam vents,
underwater hydrothermal vents, and mud pots.
These are all sources of geothermal energy. Their
heat can be captured and used directly for heat,
or their steam can be used to generate electricity
How does Geothermal Energy is generated?
• In Geothermal
power plants, the heats from
deep inside the Earth is used to produce steam
to generate electricity.
These are the following steps are followed to generate
electricity in a geothermal plant.
1.Wells are well dripped deep into the
Earth to pump steam or hot water to the
surface
2. When the water reaches the surface,
the drop in pressure causes the water to
turn into steam
3. The steam spins in a turbine, which is
connected to a generator that produces electricity
4. Cooling water cools the steam which it
condenses back to water
5 .The cooled water is pumped back into the earth
to begin the process again.
• Power plants are built in area where it is particularly hot just below the
surface such as near group of geysers, hot springs or volcanic activity.
Geyser
Hot Spring
In the Philippines, geothermal power plants are
used to generate electricity in:
Tiwi( Albay)
Kidapawan(North
Cotobato)
Tongonan (Leyte)
Other examples:
 Calaga (Laguna)
 Tongonan(Leyte)
 Bago City(Negros Occidental)
Bacon ( Sorsogon)
Valencia(Negros Oriental)
Assignment:
b
Write at least five advantages
and
disadvantages
of
Geothermal energy .