• Share
  • Email
  • Embed
  • Like
  • Save
  • Private Content
Food chains and webs presentation
 

Food chains and webs presentation

on

  • 1,501 views

AISD 7th Grade

AISD 7th Grade

Statistics

Views

Total Views
1,501
Views on SlideShare
1,471
Embed Views
30

Actions

Likes
0
Downloads
32
Comments
0

2 Embeds 30

http://dobie7thgradescience.yolasite.com 22
http://sitebuilder.yola.com 8

Accessibility

Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

    Food chains and webs presentation Food chains and webs presentation Presentation Transcript

    • Match up the word with the correct definition and picture using the cards provided by you teacher, For those words you do not know, set them to the side, you will learn them by the end of the period. Autotrophs Heterotrophs Consumers Carnivores Herbivores Decomposers Omnivores Trophic levels Food chain Producer Food web Scavengers
    • Autotrophs
      • A group of organisms that can use the energy in sunlight to convert water and carbon dioxide into Glucose (food) .
      • Autotrophs are also called Producers because they produce all of the food that heterotrophs use.
      • Without autotrophs, there would be no life on this planet.
      • Ex. Plants and Algae
    • Autotrophs
    • Heterotrophs
      • Organisms that do not make their own food.
      • Another term for Heterotroph is Consumer because they consume other organisms in order to live.
      • Ex. Rabbits, Deer, Mushrooms
    • Types of Heterotrophs
    • Types of Heterotrophs
      • Consumers
        • Scavengers/Detritivores – feed on the tissue of dead organisms (both plants and animals ).
          • Ex. – Vultures, Crows, and Shrimp
    • Types of Heterotrophs
      • Consumers
        • Herbivores – eat ONLY plants.
          • Ex. – Cows, Elephants, Giraffes
    • Types of Heterotrophs
      • Consumers
        • Carnivores – eat ONLY meat.
          • Ex. – Lions, Tigers, Sharks
    • Types of Heterotrophs
      • Consumers
        • Decomposers – absorb any dead material and break it down into simple nutrients or fertilizers.
          • Ex. – Bacteria and Mushrooms
    • Types of Heterotrophs
      • Consumers
        • Omnivores – eat BOTH plants and animals.
          • Ex. – Bears and Humans
    • Ecological Pyramid
      • An ecological pyramid models the relationship between consumers and producers at different trophic levels in an ecosystem.
    • Trophic Levels
      • Energy moves from one organism to another when it is eaten.
      • Each step in this transfer of energy is known as a trophic level.
        • The main trophic levels are producers, consumers, and decomposers.
    • Ecological Pyramid
    • Food Chains
      • The energy flow from one trophic level to the other is know as a food chain .
      • A food chain is simple and direct .
      • It involves one organism at each trophic level.
        • Primary Consumers – eat autotrophs (producers).
        • Secondary Consumers – eat the primary consumers .
        • Tertiary Consumers – eat the secondary consumers .
        • Decomposers – bacteria and fungi that break down dead organisms and recycle the material back into the environment.
    • Food Chain
    • Food Web
      • Most organisms eat more than JUST one organism.
      • When more organisms are involved, it is know as a FOOD WEB .
      • Food webs are more complex and involve many organisms.
    • Food Web
      • The arrow points in the direction of the energy transfer , NOT “what ate what”.
    •  
    • Match up the word with the correct definition and picture, using the cards provided by you teacher. Autotrophs Heterotrophs Consumers Carnivores Herbivores Decomposers Omnivores Trophic levels Food chain Producer Food web