2. Learning Competencies
• Explain how heat from inside the
Earth (geothermal) and from
flowing water (hydroelectric) is
tapped as a source of energy for
human use.
• Recognize how water is
distributed on Earth.
4. GEOTHERMAL
ENERGY
• The adjective geothermal comes
from the Greek words geo meaning
“earth” and thermos which means
“heat”. It is a renewable resource
that can be harvested for human
use.
6. FILM VIEWING
• You’re going to
watch a video
presentation
about how
geothermal
energy works.
7.
8. GEOTHERMAL
ENERGY
• In winter, a closed loop of
buried pipes circulates a fluid,
which extracts heat from the
ground and carries it to a heat
pump, which transfers the heat
to a home’s heat distribution
system.
9. GEOTHERMAL
ENERGY
• However, in summer,
this system works in
reverse, removing heat
from a home’s interior
and storing it in the
ground.
13. PROCESS QUESTION
• Based on the illustrations
presented on the previous
slides about geothermal
energy, do you think it is
safe to use this geothermal
heat pump system? How
can it affect the
environment?
14. GEOTHERMAL
ENERGY
• According to the EPA (Environmental
Protection Agency), well-designed
geothermal heat pump system is the
most energy-efficient, reliable,
environmentally clean, and cost-
effective way to heat or cool a space,
second only to superinsulation.
15. ITS TRIVIA TIME!
• The Philippines currently
has seven geothermal
fields which supply about
12 percent of the nation’s
energy, with a long-term
plan to nearly double
capacity by 2040.
21. HYDROELECTRIC
ENERGY
• There is a growing concern over
emission of methane, a potent
greenhouse gas, from the
decomposition of submerged vegetation
in hydropower plant reservoirs,
especially in warm climates.
22. HYDROELECTRIC
ENERGY
• The use of micro
hydropower
generators may
become an
increasingly important
way to produce
electricity
23. HYDROELECTRIC
ENERGY
• They use the power of
flowing water to turn
rotor blades, which
spin a turbine to
produce electric
current.
24. PROCESS QUESTION
Based on the figure of
micro hydropower
generators, where is
its usually used here
in the Philippines?
Explain.
25. FILM VIEWING
• You’re going to
watch a video
presentation
about how
Hydroelectric
energy works.
47. ACTIVITY
Directions: There are six different water
resources that we discussed. These are
the saltwater, ice, groundwater, lakes,
rivers, and wetlands. Identify and
describe at least one (1) example for
each water resources that we have
discussed.
Note: As much as possible, the
setting/location of the examples that you
are going to identify and describe is in
the Philippines. (for ice, you can cite on
the other country)
48. REFERENCES
Book:
• Miller, G. et al. (2016). Earth Science. Rex Book
Store, Inc. Nicanor Reyes Sr. St., Sampaloc, Manila
Online:
• Yehia, Y. (2018). Geothermal and Hydroelectric
Energies. Retrieved from
https://globaledge.msu.edu/blog/post/55551/geother
mal-and-hydroelectric-energy
• Retrieved from https://www.aslo.org/what-is-aquatic-
science/earths-water-resources/
Editor's Notes
Renewable resources are those resources that continue to exist despite being consumed or can replenish themselves over a period of time even as they are used.
Cooling mode-hot air goes underground
Cool air circulates through
Heating mode-cold air goes underground
Warm air circulates through home
price tags ranging from around $2-$7 million for a plant with a 1 megawatt capacity