Bellringer

1
Bellringer

• 7-10 minutes
• Review Characteristics of Life.
• Quietly quiz each other.

2
Predator-Prey

• In a predator-prey relationship one organism
  benefits and the other is killed.

3
Predator-Prey Cycle
Predator hunts wolf Prey hunted rabbit
4
Lab Report

• 1. Title for your Experiment
• 2. Hypothesis Write your hypothesis (If, then)
  format
• 3. Materials List materials Include amounts
• 4. Procedure List steps
• 5. Data Table Label with Dates, Day number
  observed, Quantitative Data, Qualitative Data

5
Nutrition and Energy Flow

• Goal 5

6
Focus Question
1. What is the source of all of the energy in
this ecosystem? 2. What path (through what
organisms) does the energy take to get to the
hawk?
7
How Organisms Obtain Energy

• Autotrophs Plants Producers make their own
  food through photosynthesis.
• Use energy from the sun through the process of
  photosynthesis to make sugar

8

• Heterotrophsconsumers
• Animals, Fungus, Bacteria, Protist
• Consume others to obtain energy
• Carnivores eat meat
• Herbivores eat plants
• Omnivores eat plants and meat
• Decomposers break down dead/decaying organisms

9
Source of All Energy

• The sun is the source of all energy.
• The energy flows from the sun, to producers, to
  consumers.

10

• Food Chain
• Single path as animals eat each other
• Autotroph to heterotroph to decomposers

• Food Web
• MANY interconnected food chains
• More realistic

11
Food Chain vs. Food Web

• Real life not as simple as a food chain

12
Trophic Levels

• Producers are at the bottom
• Herbivores 1st level consumers
• Carnivores and Omnivores 2nd and above consumers
• Decomposers All levels

13
Energy Pyramid Only 10 of the energy from each
level is transferred to the next level. Energy
is lost for movement and life processes
14
Biomass PyramidBiomass is greatest in
producers. The mass is highest in
producersPyramid of BiomassShows mass that is
required to support level above
15
Number PyramidThe number of individual
organisms is highest in producers and steadily
decreases
16
Summary of Trophic Levels and Energy FlowWhat
does the picture tell us?