Transcript How is the Earth warmed?

LO:
•To be able to interpret graphs to explain if
the climate is changing
•To be able to construct a diagram to
show the greenhouse effect
•To explain the natural causes of climate
change
•To explain the human causes of climate
change
•
How has the Earth's average
surface temperature changed
in the last 1000 years?
Total emissions of CO2 from fossil fuel burning
Industrialisation
Homo Sapiens
LO: To be able to interpret
graphs to explain if the
climate is changing
Task
• Using the information on the previous
slides and the information from this video:
https://www.youtube.com/watch?v=S9ob9W
dbXx0
• Write a summary to describe the
fluctuations in climate
How is the Earth warmed?
LO:To be able to construct
a diagram to show the
greenhouse effect
The Earth’s climate is affected
by the conditions and the
components that make up the
Earth’s atmosphere.
Over 98% of the Earth’s
atmosphere is made up of the
gases nitrogen and oxygen.
Argon, carbon dioxide,
small amounts of other
gases and water vapour
make up the remaining 2%
of the atmosphere.
Together, this combination of gases is
commonly known as air.
Life in the greenhouse
The Earth’s atmosphere acts like the glass in a greenhouse.
It is needed to keep the planet warm enough for life to exist.
Sunlight passes through the Earth’s
atmosphere and the Earth gives out
infrared radiation.
Certain gases trap some radiation
in the atmosphere, which keeps
the Earth warm. This is called the
greenhouse effect.
Having some greenhouse gases is a good thing. If it wasn’t for
these gases, Earth would be too cold to live on!
However, the presence of too many greenhouse
gases can have a negative impact on the Earth.
The greenhouse effect
The greenhouse effect
Testing terms
Greenhouse gases
Solar Energy
Reflected by
the
atmosphere
into space.
Heat lost to
space
GREENHOUSE GASES
Heat is retained
by greenhouse
gases and
warms the
atmosphere-
Earth Global Warming
radiates heat.
Solar energy
heats Earth.
Farming rice and
cattle releases
methane.
Greenhouse
gases increase.
GREENHOUSE GASES
Burning fossil
fuels releases
Carbon Dioxide.
More heat is
trapped, warming
the Earth.
Deforestation
means less
Carbon Dioxide
is taken in,
some trees are
burnt releasing
Carbon
Dioxide.
Task: use the information on the
previous slides to construct a
diagram of the enhanced
greenhouse effect
•LO: To explain the natural
causes of climate change
•To explain the human causes
of climate change
Watch the video
clip….
Using the information complete a table to
explain the human and natural causes of
climate change
Video- Climate change the causes: T:\BSH 2014 - 2015\GEOGRAPHY\2011
files\Geography\a. KS3\year 8\4. Global Warming and My Carbon
Footprint\1. What is climate Change
Complete summary card sort
Causes
Positive
Impacts
Global
Warming
Solutions
Negative
Impacts