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Envirothon 1
Biodiversity
18
Environmental Studies
6th Grade
12/30/2010

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Cards

Term
What is Biodiversity?
Definition
The variety of life on Earth.
Term
What are the three sections to biodiversiy?
Definition
Species diversity, ecosystem diversity, and genetic diversity.
Term
What is species diversity?
Definition
All living things on Earth and their species.
Term
What is ecosystem diversity?
Definition
All of the habitats on Earth.
Term
How many species are there?
Definition
About 10 million - 300 million
Term
What is genetic diversity?
Definition
The genetic variation present in a population or species.
Term
What does genetic diversity help?
Definition
Safeguard against future problems (diseases or natural disasters).
Term
True or false, loss of biodiversity is one of our most urgent environmental problems?
Definition
True.
Term
When human population increases, biodiversity ___________.
Definition
Decreases
Term
How do invasive species affect biodiversity?
Definition
They reproduce quickly and spread in large area, using lots of natural resources.
Term
What are some ways that invasive species get introduced to Pennsylvania?
Definition
Dumping aquarium plants, waterways, various imported products.
Term
What is sustainability?
Definition
The state of equilibrium with our environment.
Term
What was the "Endangered Species Act of 1973" and who was the law signed by?
Definition
It was a law designed to protect critically imperiled species from extinction. It was signed by President Nixon
Term
How many threated and endangered animals and plants are there in the United States.
Definition
481 - animals
795 - plants
Term
What does endangered mean?
Definition
A species that is in imminent danger of extinction or extirpation throughout the range of Pennsylvania.
Term
What does threatened mean?
Definition
A species that may become endangered within the foreseeable future throughout the range of Pennsylvania.
Term
What does extirpated mean?
Definition
A species that has disappeared from Pennsylvania, bit still exist elsewhere.
Term
What does extinct mean?
Definition
A species that occurred in Pennsylvania, but no longer exists.
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