Transcript Energy - kendricknovak

Answer these review questions
(in your notebook)
1. Write down the 3 layers of Earth
2. List 2 facts about earth
Agenda
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Energy Notes
Video
Notes on ecosystems and food webs
Food web Activity
Review
Energy
ENERGY IN THE EARTH
• system -interacting components that form an
integrated whole
– Described as separate but all linked
• Have boundaries, but matter and energy flow
through them
• Earth operates as a result of the combination of
smaller, interrelated systems
Two Type of Systems
Closed Systems
• energy, but not matter is exchanged with the
surroundings
Open Systems
• both energy and matter are exchanged with
the surroundings
Is Earth a Closed or Open
System?
CLOSED
Where does the energy come
from?
Where does the energy come
from?
• Sun
• Interior of the Earth
• Tides-created by gravitational attraction
• Least important of the three sources.
Energy Budget
• The first law of thermodynamics - energy
is transferred between systems, but it
cannot be created or destroyed
• The transfers of energy between Earth’s
spheres are parts of an energy budget
Factors Influencing Energy
Budget
• Land use changes
• Use of fossil fuels
• When we burn fossil fuels it releases
carbon dioxide which traps the suns
energy
• This leads to the overall temperature of
earth to increase
• Some debate as to how severe this is and
how much humans impact the cycle
Think – Pair - Share
1.Think about how we influence
energy budget
2.Find a partner and share your
thoughts
Video
Just listen and enjoy
http://www.youtube.com/watch?v=TE6wqG4
nb3M
Energy in Ecosystems
• Biotic-living
• Abiotic-not living
• Ecology - study of the relationships between
living things and their nonliving environment
• ecosystem - a community of organisms and
their abiotic environment
– Examples• Ocean
• Rotting log
Major Players in an ecosystem
• Organisms that make their own food are
called producers.
• Consumers are organisms that get their
energy by eating other organisms.
Primary
Secondary
• Decomposers are consumers that get
energy by breaking down dead organisms
Food Chain
• Shows where each organisms gets is food
and energy
Which is abiotic and biotic
Label each animal as producer,
consumer, decomposer
Food Web
• Interconnected food chains
Energy Flow
Energy
Pyramid-shows
energy flow in a
food web and
how energy is
lost
Carrying Capacity
• Matter and energy in an ecosystem are
limited, the population growth within the
ecosystem is limited
• carrying capacity - the largest population
that an environment can support at any
given time
Review Question
• Where is the largest amount of energy in
an energy pyramid?
• Where does all of the energy originate?
MN Organisms-Class Food Web
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Bobcat/cougar/lynx
Wolves
Deer
Raccoon
Fish
Hawks/Eagles
Other birds
Rodents
Fungi
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Moose
Snakes
Turtles
Fox
Conifers
Maple/Oak trees
Grasses
Shrubs/berries
HOMEWORK
Make your own food web
1. Cut out the pictures and glue them onto a
sheet of paper.
2. Then draw arrows showing the
relationship between the organisms.
Review
1. Observation/create a question
2. Hypothesis
3. Test the Hypothesis
4. Conclusion
5. Alter Hypothesis or make a new hypothesis
Branches
• Geology -structure of Earth, rocks,
minerals
• Meteorology -atmosphere and weather
• Astronomy -universe, stars, planets
• Oceanography -the ocean and its
organisms
• Environmental –humans and the
environment