Shared Flashcard Set

Details

9 weeks test
Science 9 weeks exams
19
Science
8th Grade
05/09/2010

Additional Science Flashcards

 


 

Cards

Term
the variety of life in an ecosystem
Definition
biodiversity
Term
The biodiversity of an area is measured by ____________________________________.
Definition
the # of species that live in an area
Term
Biodiversity tends to increase in ________ areas and decrease in _________ areas.
Definition
warmer;cooler
Term
People find ______ and ______ in nature.
Definition
beauty and pleasure
Term
Hundreds of species _____ the human population.
Definition
feed
Term
_______ improves the food crops.
Definition
biodiversity
Term
Biodiversity allows for stability in an _________.
Definition
ecosystem
Term
Can help prevent ________ and reduce the need for _______.
Definition
diseases; pesticides
Term
Provides people with _____.
Definition
useful materials
Term
A species that was once present on earth but has died out
Definition
extinct
Term
a species that is in danger of becoming extinct
Definition
endangered
Term
a species that is likely to become endangered in the near future
Definition
threatned
Term
A major reason why some species become threatned is ______ ______.
Definition
habitat loss
Term
a species that moves into an ecosystem as a result of human action
Definition
introduced species
Term
Biodiversity is affected by population of _____, ______, or ______.
Definition
land water or air
Term
study of methods for protectiong biodiversity
Definition
Consevative Biology
Term
Conservative plans have two goals:
_____________ and ___________
Definition
1. protect the species from harm 2.protect the habitat of the species
Term
taking action to bring a damaged habitat to a healthy condition
Definition
habitat restoration
Term
How does the us endangered species act protect species?
Definition
Makes it illegal to kill endangered or threatned species, to harm their habitats, or to build in places that might harm these species
Supporting users have an ad free experience!