energy flow in ecosystems life depends on the sun. we get all of our energy, directly or indirectly...

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Energy Flow in Ecosystems Life depends on the sun. We get all of our energy, directly or indirectly from the sun. The process called photosynthesis uses sunlight to make sugar molecules.

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Page 1: Energy Flow in Ecosystems Life depends on the sun. We get all of our energy, directly or indirectly from the sun. The process called photosynthesis uses

Energy Flow in Ecosystems

Life depends on the sun. We get all of our energy, directly or indirectly from the sun.

The process called photosynthesis uses sunlight to make sugar molecules.

Page 2: Energy Flow in Ecosystems Life depends on the sun. We get all of our energy, directly or indirectly from the sun. The process called photosynthesis uses

Life depends on the Sun

Solar energy drives a series of chemical reactions that require carbon dioxide and water to produce carbohydrates.

Page 3: Energy Flow in Ecosystems Life depends on the sun. We get all of our energy, directly or indirectly from the sun. The process called photosynthesis uses

Life depends on the Sun

Page 4: Energy Flow in Ecosystems Life depends on the sun. We get all of our energy, directly or indirectly from the sun. The process called photosynthesis uses

What Eats What

Page 5: Energy Flow in Ecosystems Life depends on the sun. We get all of our energy, directly or indirectly from the sun. The process called photosynthesis uses

Cellular Respiration: Burning the Fuel

The process of breaking down food to yield energy is called cellular respiration.

This is the reverse of photosynthesis.

Page 6: Energy Flow in Ecosystems Life depends on the sun. We get all of our energy, directly or indirectly from the sun. The process called photosynthesis uses

Energy Transfer

Each time one organism eats another organism, a transfer of energy occurs. We can trace the transfer of energy as it travels through the ecosystem by studying the food chains, food webs, and trophic levels.

Page 7: Energy Flow in Ecosystems Life depends on the sun. We get all of our energy, directly or indirectly from the sun. The process called photosynthesis uses

Food Chain

A food chain is a

sequence in which

energy is transferred

from one organism

to the next as each

organism eats another.

Page 8: Energy Flow in Ecosystems Life depends on the sun. We get all of our energy, directly or indirectly from the sun. The process called photosynthesis uses

Food Web

Is the many

feeding

relationships

that are

possible in

an ecosystem.

Page 9: Energy Flow in Ecosystems Life depends on the sun. We get all of our energy, directly or indirectly from the sun. The process called photosynthesis uses

Food Chain vs. Food Web

FOOD CHAIN(just one path of

energy)

FOOD WEB(everything is connected!)

Page 10: Energy Flow in Ecosystems Life depends on the sun. We get all of our energy, directly or indirectly from the sun. The process called photosynthesis uses

Trophic Levels

Each step through which energy is transferred in a food chain is known as a trophic level. Each time energy is transferred from one organism to another some of the energy is lost as heat and less energy is available to the next level.

Page 11: Energy Flow in Ecosystems Life depends on the sun. We get all of our energy, directly or indirectly from the sun. The process called photosynthesis uses

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