Ecology PPT #2 What is a system?

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Presentation transcript:

Ecology PPT #2 What is a system? What are the parts of a system and how do they interact?

Biodiversity Video from previous notes

Guiding Question: how does the flow of energy and matter between populations in an ecosystem help determine the size of a given population?

What is energy? The ability to do work or produce change Can neither be created nor destroyed: converts from one form to another Ex. Solar energy from the sun to chemical energy in a cell

What is matter? Occupies space, has mass (is made of atoms) Ex. Solids, liquids or gases

Earth is made primarily of water

What is a population? A group of living organisms from the same species living together in the same geographic area at the same time.

What is a system? Has organized parts that interact to maintain a balance Those parts are various forms of matter and energy There are inputs (things that go in) and outputs (things that leave)

Earth is considered a system There are 4 main sub systems that interact to maintain balance on Earth: Atmosphere Geosphere Hydrosphere Biosphere

If systems do work, what is the main source of energy? The sun