Transcript THE ROLE CHEMISTRY HAS IN OUR LIFE

THE ROLE CHEMISTRY HAS
IN OUR LIFE
CHEMISTRY’S RELATIONSHIP
TO GLOBAL CLIMATE CHANGE
What is chemistry’s role in your
life?
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Synthetic Material
Pharmaceuticals
Cosmetics
Cleaning Products
Industrial Processes
Need pictures of some of these
Items in the slide
Climate Change
• UV radiation travels from the sun through space
and strikes surfaces on the earth
• Radiant energy is absorbed and some
transferred into thermal energy which radiates
back out into space
• Some of that heat is trapped in molecules of the
atmosphere (CO2, H20, CH4)
• These gases increase the temperature of the
atmosphere
Need a graphic that shows global warming
GREENHOUSE GASES
• CO2, H20, CH4, and NO are greenhouse
gases
• They hold heat because of the flexibility of
the bonds in the molecule
• Stretching, bending, twisting, rotation, and
vibration of bonds allows kinetic energy to
be stored
• Nitrogen and oxygen has do not have the
same flexibility as the green house gases.
THIS IS A SUGGESTION PAGE
• I might make the last slide up into two
slides and add some graphics.
• Show the flexibility of a carbon dioxide,
water, or methane bond (1ST SLIDE)
• Show how nitrogen and oxygen do not
have that flexibility. (2ND SLIDE)
Nutrient Cycles
• The exchange of elements from biotic to
abiotic reserves in a ecosystem
• Those elements that are cycled are water,
carbon, nitrogen, phosphorous.
• The imbalance of nutrients with these
cycles presents problems for the
ecosystem
• Human activity has made a great impact
on these cycles.
NITROGEN CYLCE
• Air --- nitrogen gas (NOx)
• Soil – nitrates and ammonia
– Nitrogen Fixation
• Biotic – Proteins and Nucleic Acids
• Water – nitrates
Need a graphic of the nitrogen cycle
CARBON CYCLE
• Lithosphere – historically are the two
largest reservoirs for carbon
• Lithosphere – carbonates, fossil fuels
• Hydrosphere – carbonates and dissolved
carbon dioxide gas
• Biotic – carbohydrates, proteins, nucleic
acids
• Air – carbon dioxide and methane
Need a graphic of the carbon cycle