Food Webs and Ecosystems

Food Webs and Ecosystems

Food Webs Review

• Food webs are made up of connected Food Chains

• Arrows show the direction that energy flows

• More energy can be found with the producers

Energy Pyramids Review

• Producers are the foundation for energy pyramids, food chains, and food webs

• Producers get their energy from the sun

• As you move up the energy pyramid, energy decreases

• As energy decreases, so does the amount of life found there (biomass)

Multiple Choice

What would happen if there were no thrush in the model above?

• there would be more insects and slugs

• there would be less insects and sluga

• there would be more voles

• there would be more hawks

Multiple Choice

The model above is an example of a ...

• food chain

• food web

• habitat

• ecosystem

Multiple Choice

The model above is an example of a ..

• food web

• food chain

• habitat

• ecosystem

Multiple Choice

What is the producer in the picture above?

• grasshopper

• snake

• grass

• Sun

Levels of Organization and Food Webs

• Organism - a single member of a particular species

• Population - multiple members of that species found in a particular area

• A zebra population is pictured

• 
  

Levels of Organization Continued

• Community - all the LIVING things in an area interacting together

• Ecosystem - All the Living and Nonliving things in an area interacting

• 
  

Multiple Choice

which is the correct order of the levels of organization from simple to complex?

• organism, population, community, ecosystem
• ecosystem, community, population, organism

Multiple Choice

Which is an example of an organism?

• a beetle
• a lake
• a rock
• a shell

Multiple Choice

A forest full of many kinds of trees and grasses is an example of a

• group
• organism
• population
• community

Multiple Choice

Multiple organisms of the same species describes a

• organism
• population
• community
• ecosystem

Multiple Choice

Which level of organization is the most complex?

• organism
• population
• community
• ecosystem

Ecosystems are the interaction of living and nonliving things

• Abiotic factors - are those that are nonliving

• Biotic factors - those that are living

Multiple Choice

Temperature, light, air, water, and soil are all  _____  parts of the environment

• alive
• biotic 
• abiotic
• living

Multiple Choice

Which of the following is not an abiotic factor?

• sun
• temperature
• soil
• grass

Multiple Choice

A living or once-living organisms in an ecosystem is a

• population
• biotic factor
• abiotic factor
• community

Food Webs Occur in 3 Major Types of Ecosystems

• Type 1 - Marine

• Marine ecosystems are Salt water ecosystems

Food Webs Occur in 3 Major Types of Ecosystems

• Type 2 - Freshwater Ecosystems

• Freshwater ecosystems include streams, lakes, rivers, ponds

• If it is water based and the water lacks salt, it is freshwater

Food Webs Occur in 3 Major Types of Ecosystems

• Type 3 - Terrestrial Ecosystems

• Terrestrial ecosystems are all land based

• If it has land, it's terrestrial

Multiple Choice

All of the living and nonliving things in an area that interact with each other are called a/an ______.

• community
• habitat
• population
• ecosystem

Multiple Choice

Where does the food chain START?

• with consumers that eat grass

• with the sun giving energy to producers

• with the sun giving energy to consumers

• with consumers eating other consumers

Multiple Choice

A Great White Shark would be found in what ecosystem?

• Freshwater

• Marine

• Terrestrial