Science test Flashcards
Are usable materials that man can obtain from the physical world.
Natural resources
These provide food
Consumers
These trap energy from the sun and convert the energy into food.
Producers
are important for removing and recycling wastes.
Decomposers
________ is the science of growing crops and livestock
Agriculture
Steller’s sea cow, Great auk, carolina parakeet, are all
extinct
Most farmers practice ________ ______ to keep their soil in good condition
Crop rotation
The ___________ is the rate at which new individuals are born into a population
Birthrate
The _______ ______ is the rate at which individuals die and are no longer part of a population
death rate
____________ _________ living things that people raise primarily for their own use
Domesticated organisms
____________ _________ resources that are able to be replaced
Renewable resources
___________ __________ resources that are unable to be replaced
Nonrenewable resources
Methods of replenishing the soil
Using fertilizers, Planting legumes, Practicing crop rotation, Practicing no-till agriculture, Planting ground cover.
The movement of people into an area
Immigration
movement of people out of an area
Emigration
______ ______ an energy source derived from the fossilized remains of plants and animals
Fossil fuel
The addition of impurities to an ecosystem, such as energy pollutants and substance pollutants
Pollution
_________________ _________ can be broken down by the environment
Biodegradable
______________ ________ cannot be broken down by the environment
Nonbiodegradale pollutants
_________ ________ chemicals that can harm living things
hazardous substances
_______ ______ one of the most abundant air pollutants
Carbon monixid
This is a combination of smoke automobile exhaust and fog
smog
Recycle means to
use again
Solid waste materials are
sanitary landfills and recycling
A population reaches its _______ ________ when limiting factors prevent further growth
carrying capacity
This is the killing of unborn babies
abortion
this is the killing of old or very sick
euthanasia
__________ is the preservation and wise use of natural resources.
Conservation
Sewage paper and wood are all examples of
Biodegradable pollutants
Plastic glass and many different chemicals are examples of
Nonbiodegradable pollutants
_______ is the preservation and wise use of natural resources
conservation
