Transcript SC.912.e.7.9

SC.912.E.7.9
Cite evidence that the ocean has had a
significant influence on climate change
by absorbing, storing, and moving heat,
carbon, and water.
• SC.D.1.4.3: CS The student knows that
changes in Earth’s climate, geological activity,
and life forms may be traced and compared.
MC
• SC.912.E.7.9 Cite evidence that the ocean
has had a significant influence on climate
change by absorbing, storing, and moving
heat, carbon, and water. S
• SC.D.2.4.1: AA (Also assesses G.2.4.4) The
student understands the interconnectedness
of the systems on Earth and the quality of
life.
Earth Systems and Patterns
• The scientific theory of the evolution of Earth
states that changes in our planet are driven by
the flow of energy and the cycling of matter
through dynamic interactions among the
atmosphere, hydrosphere, cryosphere,
geosphere, and biosphere, and the resources
used to sustain human civilization on Earth.
Questions
• Jerry conducted an experiment to determine whether salt added to a cup
of water affects its freezing point. Water samples were prepared
containing equal quantities of water at the same temperature. Each
sample received a different amount of salt and was placed into a freezer.
The length of time it took for each sample to freeze was recorded. EFFECT
OF SALT ON THE FREEZING POINT OF WATER Amount of Salt Added
Freezing Time in grams (g) in minutes (min) 0 48 1.25 68 2.50 75 3.70 88
5.0 (Did not freeze during the time of experiment)
• Which conclusion correctly interprets the information from Jerry’s table?
• A. A conclusion cannot be made because the last sample did not freeze.
• B. Doubling the salt doubled the time needed for the samples to freeze.
• C. An increase in the amount of salt lowered the time needed for the
samples to freeze.
• D. An increase in the amount of salt increased the time needed for the
samples to freeze.
• Stephen learned that methane (CH4) absorbs about 25 times more
infrared radiation13 than carbon dioxide (CO2). He knew that ice core data
could give information about historic atmospheric changes. A table
showing ice core data from Antarctica is shown below.
• METHANE DATA FROM DE08, DE08-2, ANDDSS ICE CORES IN
ANTARCTICAYear (A.D.)
• Concentration of CH4 mixed with air in ice core (ppm)
Mean ice
depth (meters)
• 1008
0.67
534
• 1501
0.69
337
• 1694
0.68
238
• 1798
0.70
180
• 1847
0.76
152
• 1931
1.01
100
• 1980
1.48
81
Earth has warmed by about 1ºF over the past 100 years. But why? And how?
Well, scientists are not exactly sure. But lets explore what the ocean may be
doing for that……
Factors That Affect Climate
Factors That Affect Climate
 Water Bodies
• Large bodies of water such as lakes and oceans
have an important effect on the temperature of an
area because the temperature of the water body
influences the temperature of the air above it.
 Atmospheric Circulation
• Global winds are another factor that influences
climate because they distribute heat and moisture
around Earth.
Climate Changes
Natural Processes That Change Climates
 Ocean Circulation
• Changes in ocean circulation also can result in short-term climate
fluctuations.
Ocean Surface Currents
How do ocean currents
affect climate?
Warm Currents: warmer climate
Cold Currents: cooler climate
Day 2
Fill in worksheet as you review powerpoint
Ice Ages are cyclic.
The last one occurred
~12,000 years ago
The exact cause of
what triggers an ice age
is not known
El Niño
A warming of the
Pacific Ocean.
Winters:
West = Stormy
South = Cold, wet
Northeast = warmer
La Niña
A cooling of the Pacific Ocean.
Dry in southeast. Cool, wet in northwest.
Average global temperatures
are increasing.
Glaciers are melting.
Ocean levels are rising.
Warming is natural.
Humans are speeding up the process
through increased levels of
carbon dioxide (CO2)
Mountain Glaciers
Day 3
Create a flowchart to to show movement of water from the “Conveyor
Belt” reading pg 453 Prentice Hall
DAY 4
• Assessment