archivo recuperado 1.pptx
TRANSCRIPT
© Oxford University Press España S.A., 2013
Natural Sciences 2
Un
it 12
Matter and energy in ecosystems
© Oxford University Press España S.A., 2013
What is an ecosystem?
What is the relationship between the biotope, biocenosis and ecosystem?
Water in ecosystems
How is water’s property as a solvent related to the life functions of ecosystems?
Biotic factors
What type of families are shown in each photo?
Interspecific relationships
What type of interspecific relationship is shown in this photo?
Matter and energy in ecosystems
What does this diagram represent?
Trophic levels in an ecosystem
What is the role of decomposers in an ecosystem?
Food chains
Describe the main similarities between these two food chains.
Food webs
What are the primary, secondary and tertiary predators in this food web?
Food webs
What is the primary producer in this food web?
The carbon cycle
Describe the three ways that the carbon from organic remains is returned to the atmosphere.
The nitrogen cycle
How do consumers obtain nitrogen and release it into the environment?
The water cycle
What role does the Sun have in the water cycle?
Sustainable development
What can we do to avoid starting forest fires?
What have we learned?
What type of interspecific relationship is shown in image 1?
How is acid rain produced? What effect does it have on ecosystems?
1 2