Chapter 36 Lecture Notes

Chapter 36.3
Chemicals in ecosystem

  • Define the following key terms:
  • Nitrogen fixation
  • Nitrification
  • Transpiration
  • The Basic Patterns of Chemical Cycling p.795
  • List the 3 steps
  • See Figure 36.9

The Carbon-Oxygen Cycle

  • The movement of oxygen and carbon throughout the ecosystem is very closely related. e.g. CO2 and CO
  • Significant amounts of inorganic CO2 are found dissolved in water.
  • During respiration both producers & consumers break down organic compounds and release carbon dioxide gas.

The Nitrogen Cycle

  • Nitrogen is found in all living things as an element in Amino Acids.
  • Almost 80% of Earth’s Atmosphere is made up of Nitrogen gas (N2)
  • Producers absorb ammonium and nitrates from the soil and consumers eat the producers (transfer of nitrates).

The Water Cycle

  • Condensation: From a gas to a liquid (clouds)
  • Precipitation: Any form of moisture from the sky (Rain, sleet, snow, hail)
  • Evaporation: From a liquid to gas
  • Transpiration: release of water/moisture from the leaves of plants & trees
  • Runoff: Water moving from a higher terrestrial area to a lower area (down a mountain or hill)

Assessment

  • Complete the Concept Check p. 798
  • Answer in complete sentences
  • You can answer on the same sheet of paper as your notes.
  • We will go over answer together in class.

Feeding relationships determine the path of energy & chemicals in ecosystems.
36.1

Define the Key Terms

  • Producer
  • Consumer
  • Decomposer
  • Trophic level
  • Food Chain
  • Herbivore
  • Carnivore
  • Omnivore
  • Primary Consumer
  • Secondary Consumer
  • Tertiary consumer
  • Detritus
  • Food web
  • Figure 36.1 on page 788
  • Figure 36.2 on page 789
  • Figure 36.3 on page 790
  • Figure 36.5 on page 792
  • Figure 36.6 &7 on page 793

Assessment

1.List 3 organisms that are carnivores.

2. List 3 organisms that are Herbivores.

3. List 3 organisms that are Omnivores.

4. Give an example of a Producer and an example of a consumer.

  • Complete the Concept Check p. 791
  • Answer in complete sentences
  • You can answer on the same sheet of paper as your notes.
  • We will go over answer together in class.

 

 

Homework project

  • Draw a food chain (Or cut pictures from a magazine) with at least 4 organisms. Label each as a either a carnivore, herbivore, omnivore, consumer or producer. Tell which habitat you would find these animals. (Hint, they all have to be in the same habitat!) Due Oct. 11th/12th . Worth 2 grades.