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Science, Technology and Climate Change
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1. Identifying the causes of climate change. 2. Explaining the effects of climate change to people’s health, biodiversity and society.
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GEN 003: Science Technology & SocietyStudent Activity Sheet
Lesson 19
Lesson title: Science, Technology and Climate Change Materials:
Student Activity Sheet; Syllabus
Lesson Objectives: References:
Serafica, Janice Patria J. et al. (2018).
1. Identifying the causes of climate change.
Science, Technology and Society.
2. Explaining the effects of climate change to people’s health, 1st Ed. Philippines: Rex Book Store
biodiversity and society. https://www.huffingtonpost.com/rosaly-
byrd/climate-change-is-a-
socia_b_5939186.html
A. LESSON PREVIEW/REVIEW
Introduction (2 mins)
Today’s topic is a global problem, the climate change. Take note, it is not just your personal problem but
worldwide, just like this pandemic we have experienced in the beginning of this year.
B. MAIN LESSON
1) Activity 1: Content Notes (13 mins)
Climate change is a worldwide issue that we have to face. It refers to the statistically significant changes in
climate for continuous period of time. Factors that contribute to climate change can be natural internal process,
external forces and persistent anthropogenic changes in the composition of the atmosphere or in land use. It can also
be due to natural occurrences or contributed by acts of human beings
NATURAL CAUSES
Volcanic Eruptions. When volcanoes erupt, it emits different natural aerosols like carbon dioxide, sulfur
dioxides, salt crystals, volcanic ashes or dust, and even microorganisms like bacteria and viruses.
Orbital Changes. This was proposed by Milankovitch theory that states that, “as the earth travels through the
space around the sun, cyclical variations in three elements (eccentricity, obliquity, precession) of earth-sun
geometry combine to produce variations in the amount of solar energy that reaches earth (Academic Emporia,
2017).
The Carbon Dioxide Theory. Carbon dioxide (CO2) is added when power and heat are produced by burning
coal, oil and other fossil fuels. Carbon dioxide is transparent to sunshine but not invisible to infrared (heat)
radiation leaving the ground. Carbon dioxide absorbs part of the infrared radiation in the air and returns it to the
ground keeping the air near the surface warmer than it would be if the carbon dioxide did not act like a blanket.
Doubling the carbon dioxide raises the temperature to 2oC to 3oC.
HUMAN ACTIVITIES contribute to climate change. The largest known contribution comes from the burning of
fossil fuels, which releases carbon dioxide gas to the atmosphere. Greenhouse gases and aerosols affect climate
change by altering incoming solar radiation and outgoing infrared (thermal) radiation that are part of earth’s energy
balance. Changing the atmospheric abundance or properties of these gases and particles can lead to a warming or
cooling of the climate system.
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