Energy

Key Question:

How does energy flow through Ecosystems?


Ecosystem: community of plants, animals, and smaller organisms that live, feed, reproduce and interact in the same area or environment.

Biome: large geographical area of distinctive plant groups, animal groups, and smaller organisms, which are adapted to that particular environment.



Ecosystems

Species

Population

Community

Ecosystem

Biome

Biosphere




Sun: Energy Source

Primary Producers

Consumers



Lions - Ecosystems

Consumers

Carnivores

Herbivores

Omnivores

Decomposers

Detritivores

Scavengers




Food Chain and Food Web


What is the difference between a Food Chain and a Food Web?

Food Chains follow a single path:

Grass is a primary producer that relies on the Sun.
The Grass is eaten by a Grasshopper.
The Grasshopper is eaten by a Frog.
The Frog is eaten by a Snake.
The Snake is eaten by a Hawk.


Food Webs show how Plants and Animals are connected by multiple paths:

Trees produce Acorns. Acorns are food for Mice and Insects. The Mice are eaten by weasels and Snakes. Insects and acorns are eaten by Birds and Skunks. Mice and Skunks are likely to be eaten by a Hawk, Owl, or Fox. Food Webs show how plants and animals are connected in many ways to help them all survive. Food Chains follow one path of energy as animals find food.




Food & Energy

Where do organisms get energy?

"You are what you eat!"

What is Cellular Respiration?

Living things get energy from food through Cellular Respiration.

Cellular Respiration: The process that releases energy from food, such as the simple sugar Glucose, when Oxygen is present

Read pages 212-215 of Textbook!



6O2 + C6H12O6 ---> 6CO2 + 6H20 + Energy

Oxygen + Glucose (Sugars) ---> Carbon Dioxide + Water + Energy (ATP)

The energy stored in food is released slowly!


Cellular Respiration takes place in Three Stages!

Glycolysis, Krebbs Cycle, Electron Transport



Ecosystems


Glycolysis takes place in the Cytoplasm of the Cell. Anaerobic process (without oxygen).


The Krebs Cycle & Electron Transport Chain take place in the "mighty" Mitochondria. Aerobic process (with oxygen).



Carbon Cycle

Ecosystems


Carbon Cycle

Carbon Cycle

Carbon


Photosynthesis & Cell Respiration

Ecosystems



Key Questions:


How does Energy flow through Ecosystems?

How does the organization of organisms allow for the movement and transfer of matter and energy?

Where does exhaled CO2 come from?




if you have a curious && creative mindset ...



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