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5th grade NS Unit 2 Ecosystems
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How can we protect ecosystems?
By not wasting resources, not using up resources, and not destroying ecosystems.
How should we use natural resources?
in a fair and rational way
What aims to guarantee the survival of people today and in the future?
sustainable development
What do we overexploit?
resources
What are three ways we alter ecosystems?
we overexploit resources, we distribute resources badly, we occupy, alter and pollute ecosystems
What is the meaning of extinction?
complete disappearance of a species
What can destructive human activity lead to?
extinction of species
What is causing imbalance in natural ecosystems?
many human activities
What is causing many ecosystems to deteriorate?
our current way of life
What are the two different origins of an ecosystem?
natural and artificial
How can we classify ecosystems?
By size, origin, the characteristics of the biotope
What do we call the living things in an ecosystem?
biocoenosis
What is the meaning of biotope?
non-living components
What are the three elements of ecosystems?
biotope, relationships. biocoenosis
What are the three types of ecosystems?
aquatic, land and mixed


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