Bell Ringer

• From the video Monday, pick one segment and describe the relationship between the organisms in that segment. Your description should be 5-7 sentences.

EcosystemsWhat makes you live?

Essential Questions

• What are biotic and abiotic factors?

• What roles do organisms play in an ecosystem?

Factors in an Ecosystem• Abiotic factors are the non-living

factors in an ecosystem

• Biotic factors are the living factors or once living factors in an ecosystem

• Make a T-chart on your paper and take one minute to list as many biotic and abiotic factors you can think of.

Ecosystems

• An individual is a single organism in an environment.

• Individuals of the same type in the same environment are called a population.

• All the types of populations living together in a environment make up a community.

Ecosystems• Together, a community and a

physical location make up an ecosystem.

• A limiting factor affects the population of an ecosystem.

• Ex. Food, water, shelter

• Population Density is the number of organisms an ecosystem can support.

Check your learning• What are biotic factors

• What are abiotic factors

• Describe an ecosystem

• Identify each as biotic or abiotic

Ecosystem

• Because there are limited resources in an ecosystem, there can be competition.

• Animals have developed traits over time to help them compete.

Interdependence

• Organisms in an ecosystem are interdependent, meaning they depend on each other for survival.

• Each population of organisms has a niche. A niche is the specific role that an organism has an ecosystem.

Food for Thought

• What niches do you fit in?

• What niches could organisms have in an ecosystems?

Niches and Roles

• A producer is an organism that produces its own food.

• A consumer is an organism that eats producer or other consumers.

• A decomposer breaks down other organisms.

Food Chain

• A food chain shows the flow of energy through an ecosystem.

• The SUN is the origin of all energy on Earth!

• Producers are always the the first level after the sun.

Food Chains

Food Web

• A Food Web shows how all food chains are connected.

Exit Slip• What are abiotic factors?

• What are biotic factors?

• Label each of the following pictures as producer, consumer, or decomposer.

Please put one question you have

about what was covered today!