# Ecology 6.3 and 6.4

Today's lesson
You will need a paper and pencil!
Review the water and carbon cycle
Discuss the pyramid of numbers and biomass
1 / 18
Slide 1: Slide
BiologieMiddelbare schoolhavoLeerjaar 2

This lesson contains 18 slides, with interactive quizzes, text slides and 1 video.

## Items in this lesson

Today's lesson
You will need a paper and pencil!
Review the water and carbon cycle
Discuss the pyramid of numbers and biomass

#### Slide 1 -Slide

To Do:
Draw a picture of the water cycle.
Use the words: Evaporation, condensation, precipitation,
infiltration and evapotranspiration

#### Slide 3 -Slide

Carbon Cycle
Before we begin...let's review 2 important processes.
1. Cellular respiration
2. Photosynthesis

#### Slide 4 -Slide

recall cell respiration
A
carbon dioxide + water -> glucose + oxygen
B
glucose + oxygen -> carbon dioxide + water

#### Slide 5 -Quiz

Carbon Cycle
Let's review
Makes notes from whiteboard

#### Slide 7 -Video

6,4 Ecological pyramids
Simplify!
A food web is too complicated to study in detail
Break it down into producers, consumers, and so forth
See a food chain graphically to better understand relationships between organisms.

#### Slide 9 -Slide

Pyramid of numbers:
• The amount of individual organisms in the community reflected in a pyramid.
• Each trophic level of a food chain is represented with a bar.
• The amount of individuals in each trophic level is represented by the size of the bar.

#### Slide 12 -Slide

Pyramid of biomass:
• The total biomass of all organisms in the community reflected in a pyramid.
• The total biomass of each trophic level of a food chain is represented with a bar.
• The amount organisms in each trophic level is multiplied by the mass of each individual to get the biomass.

#### Slide 14 -Slide

This is a pyramid of ...
A
numbers
B
biomass
C
it is not a pyramid
D
it can be both a pyramid of numbers and of biomass

#### Slide 15 -Quiz

What does the pyramid of biomass show?
A
The biomass of one animal
B
The biomass in a link in the food chain
C
The number of organisms in a link in the food chain

#### Slide 16 -Quiz

a pyramid of numbers has always the shape of a pyramid
A
correct
B
incorrect

#### Slide 17 -Quiz

What did we learn?
1. The water cycle
2. The carbon cycle
3. Pyramid of numbers
4. Pyramid of biomass

To Do:
Read 6,3 and Do Qs 11 to 14
Read 6,4 and Do Qs 15 and 16