Answer these review questions(in your notebook)

1. Write down the 3 layers of Earth

2. List 2 facts about earth

Agenda

• 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=TE6wqG4nb3M

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

• Bobcat/cougar/lynx• Wolves• Deer• Raccoon• Fish• Hawks/Eagles• Other birds• Rodents• Fungi

• Moose

• Snakes

• Turtles

• Fox

• Conifers

• Maple/Oak trees

• Grasses

• Shrubs/berries

HOMEWORKMake 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