EES_Y3_LSN6

• Biologie
• Middelbare school
• havo, vwo
• Leerjaar 3

EES_Y3_LSN6

Evolution, Ecology & Sustainability

Lesson 8 - ENERGY & NUTRIENT TRANSFER: 

P.  335-337 

Learning goals:

• I can explain and interpret what food chains and food webs are.
• I can draw my own food chain & food web based on a text/diagram.
• I can name and explain the various roles within a food chain/web.
• I understand what trophic levels are and how they work. 
• I know and understand what pyramids of numbers and biomass are.

Keywords:

• Producer
• Consumer
• Primary consumer
• Secondary consumer
• Tertiary consumer
• Decomposer
• Apex predator
• Foodchain
• Foodweb
• Trophic levels
• Pyramids (biomass, energy & numbers)
• Energy flow
• Energy intake
• Autotroph
• Heterotroph

Biosphere

Biosphere

Biomes

Biomes

Ecosystem

Ecosystem

Community

Community

Habitat

Habitat

Environment

06:21

Autotrophs

Heterotrophs

Consumer

Producer

Carbon from organic matter

Carbon from inorganic matter

Animals

Plants

Feeding relationships

• Autotrophs: producers
• Heterotrophs: consumers

Food chain

• Each step is a trophic level
• Arrows represent energy transfer

Food web

• Show all feeding 
  relationships
• Trophic level can
  depend on food chain
  you focus on. 
  Example: rattlesnake
  can be secondary or
  tertiary consumer

Producer

Primary consumer

Secondary consumer

Tertiary consumer

In the food web shown which organism would be called an omnivore?

1. Grasshopper
2. Frog
3. Mouse
4. Fungus

Homework for Lesson 6:

To be completed by the next lesson (lsn6):

• Read tb pages P. 335-337
• Study keywords from lesson 5
• make exercise 1 - 3 at the end of the chapter page 353.