B14a Organisation of Ecosystems Flashcards
Plants are producers. What does this mean?
They make food by photosynthesis.
What do all food chains start with?
Producer
Plant or algae
Make glucose by photosynthesis
Name the group of organisms that eat the producers
Primary consumers
Name the group of organisms that eat primary consumers
Secondary consumers
Name the producer on this food chain
Algae
What is a tertiary consumer?
Eats a secondary consumer
What is a predator?
Kill and eat other animals
What is the name given to an organism eaten by a predator?
Prey
Describe the pattern of predators and prey in a stable community
The numbers of predators and prey rise and fall in cycles
What do food chains show?
Feeding relationships of different organisms
and the flow of energy between them
Name the primry consumer shown on this food chain
Flies
Name the prey of the snake
Frog
Name the secondary consumer shown on this food chain
Frog
Define biomass
Total mass of all the living material
What do the arrows show in a food chain?
Movement of energy or biomass
What pieces of apparatus is used to measure the number or distribution of organisms in an area?
Quadrat
How is a mean number of organisms in a population calculated?
Add together the number of organisms found in each quadrat. Divide by the number of quadrats used
When considering the abundance of different organisms what is meant by the term mode?
The organism present in the greatest numbers
Which organism is eeding as a secondary consumer?
Fish
When considering the abundance of different organisms what is meant by the term median?
The organism that represent the middle value when the numbers are arranged from lowest to highest.
The diagram shows the carbon cycle. Name the process labelled A
Photosynthesis
The diagram shows the carbon cycle. name the process labelled B
Respiration
Describe the carbon cycle
Plant change carbon dioxide into organic materials in photosynthesis
Organic material passes along the food chain
Carbon dioxide is released by into the atmosphere by respiration from plants and animals
Decomposers convert dead material into carbon dioxide
Burning fuel also releases carbon dioxide into the atmosphere
Name the process labelled C on the diagram of the carbon cycle
Combustion (burning)
Describe the water cycle
Water from lakes and oceans evaporates
Evaporated water condense to form clouds
Precipitation (Rain)
Infilration
Prculation to form grond water
Water absorbed by plants and is lost by transpiration
Water runs off into rivers and oceans
The diagram show the water cycle. Name the process labelled A
Run off
The diagram show the water cycle. Name the process labelled B
Precipitsation (rain)
The diagram show the water cycle. Name the process labelled C
Evaporation
The diagram shows the water cycle. Name the process labelled 1
Transpiration
The diagram shows the water cycle. Name the process labelled 1
Transpiration
Name the secondary consumer on this food chain
Lion
What do the arrows show on this diagram
Movement of energy or biomass
