Transcript TOPIC ONE CHANGE: ENERGY AND INTERFACES

TOPIC ONE
CHANGE: ENERGY AND INTERFACES
Most changes cannot occur unless a flow of energy also
takes place
What is energy?
Capacity to do
work
The part from which energy flows
Loses(pierde)
____________energy
While the part to which energy flows Gains (aumenta)energy
Energy flows from the
fire to the hands.
Where do changes and energy
flow?
Occur in the environment
Occur where different materials come (ajuntan)together
This type of boundary (limite) where regions (regiones) of
different properties come together is called
Interface
an_______________
Energy flow is across an interface
http://www.youtube.com/watch?v=mw_BDcgqtKY
Friction fire video
Interfaces can be easy or
sharp to see.
Stream and its bed
What happens at this interface?
Erosion occurs as Kinetic energy from the water is
transferred to soil and rock particles of the stream- La
erosion se produce en forma de energia cinetica del agua y es
transferida al suelo y particulas de roca de la corriente
http://video.google.com/videoplay?docid=-8750134985340587369&q=flash+flood&total=690&start=10&num=10&so=0&type=search&plindex=3
Flash Flood Video
Not so easy to see
interfaces:
- Fog and clear air
- Earth’s atmosphere and empty space
- These are not so easy to see, these
interfaces are called diffuse
interfaces (interfaces difusas)
ENVIRONMENTAL CHANGE
Dynamic equilibrium
Changes are occurring but there is a balance among the changes so the
overall conditions remain the same
Float in a toilet
http://www.youtube.com/
watch?v=TNg58QLyh0w
Explain how this device works
When you flush the toilet, the water is released into the
tank causing the float to lower. This enables the water
to refill the tank until the float returns to its original
position, turning off the water.
Dynamic Equilibrium in
Nature
• In a forest numbers of various plants
and animals tend to be about the
same (iguales) year to year
•Even though individual plants
and animal die
•This is the balance of nature.
How can we Upset (alterar)
Environmental Equilibrium ?
Natural disasters
- Volcanic eruption
Natural Disasters
- Earthquakes
Eventually with enough time,
equilibrium is restored.
San Andreas Fault
Volcano Diagram Printout
Volcanoes
http://www.sci.sdsu.edu/volcano/
Animated Volcano
• A volcano is a place on the Earth's surface
(or any other planet's or moon's surface)
where molten rock, gases and pyroclastic
debris erupt through the earth's crust.
Volcanoes vary quite a bit in their
structure - some are cracks in the earth's
crust where lava erupts, and some are
domes, shields, or mountain-like structures
with a crater at the summit.
• Magma is ___________
molten rock
in the Earth's crust. When magma
erupts through the earth's surface it
lava.
is called __________
• The largest volcano on Earth is
Hawaii's Mauna Loa. Mauna Loa is
about 6 miles (10 km) tall from the
sea floor to its summit (it rises about
4 km above sea level). It also has the
greatest volume of any volcano,
10,200 cubic miles (42,500 cubic
kilometers).
• The largest volcano in our Solar
System is perhaps Olympus Mons on
the planet Mars. This enormous
volcano is 17 miles (27 km) tall and
over 320 miles (520 km) across.
HUMANS – permanent
disruptions of equilibrium
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List Three
1. Deforestation of the rainforest
2.
Burning fossil fuels – Global Warming
3.
Toxic Waste / Radioactive wastes
Environmental pollution
• Things that pollute are called
Pollutants.
• The presence of pollutants in the
environment to such a degree as to
have an adverse effect on plant and
animal life is called pollution.
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There are two types of
pollution:
1. Natural
- Ash from a volcano- Biologic organisms
- Energy- Heat, Sound, nuclear
2. Human
- Carbon monoxide
-
Pollutants may be solids,
liquids, or gases.
• Pollutants are found where?
- Land
-Air
- Water
-Space