Intro to Energy

1st Law of Thermodynamics

Gasoline

Converting

From this

To

This

2nd Law of Thermodynamics Energy can’t be converted without the loss of some usable energy

2nd Law of Thermodynamics

Loss of energy in the food chain

Much of our energy goes to… Converting energy results in heat being given off… That heat is not harvestable by other organisms

Metabolism All chemical reactions in a cell

Bear or Mouse Mice work harder to stay warm Higher muscle to fat ratio More active in summer

Photosynthesis Converting sun to food Requires sunlight, CO2, and water Produces: O2 and Sugar

The Process

An anabolic pathway Store energy for later Trees be like, “I want that sun energy later, I’m’a convert it”

The problem with wind

Cell phone analogy

Cell phone analogy

Cellular Respiration Convert food to energy Requires organic substance and O2 Gives off: CO2 and Water

The Process

I’m gonna use that energy now

Metabolic Pathway Nature ROCKS at recycling!!

ATP pathway Put energy in to make ATP Can use that energy later Can also use energy elsewhere

Anabolic From lesser to greater complexity Build UP

Catabolic From greater to lesser complexity BREAK down