-
what is population density?
the measure of the number of people in a given area
-
explain landfills. why do tey have liners?
- a site for disposal of waste materials
- liners:keep toxic chemicals from seeping into groundwater
-
explain renewable natural resources give an ex.
- a resource that can use over and over again.
- wood,sun,water
-
explain nonrenewable natural resource give an ex.
- resources that connot be replaced or replnished fast enough.
- coal,petroleum(oil),natural gas
-
explain pollutant
a substance that makes air,water,and land harmful to life
-
what are the 2 main types of pollution we talked about? give details for each type
- air and water pollution
- air-caused from vehicles,power plants, and factories
- water-caused by chemical run-off,farm fields,oil spills, and erosion.
-
explain exstinction. how many species go exstinct each year?
- when a specie is no longer living
- aboout 100 each year
-
wha consequences would come from from clear cutting a forest?
it would take away available food,space, and shelter
-
explain biodiversity. why is it healthy for an ecosystem? how can we preserve biodiversity?
- the number and variety of life forms with in an ecosystem
- the greater the biodiversity the more easily an ecosystem can recover
- cities can protect natural habitats and conserve resources
-
explain conservation.
the process of saving or protecting and conserve resources
-
explain organic farms
farms that use natural pest controls and fertilizers
-
explain fuel cells
they can power cars without gasoline
-
list and explain alternative energy sources
- geothermal energy- uses heat from earth
- wind energy- uses energy from wind to turn tubines
- hydropower/electric energy-uses energy from flowing water
- tidal energy- uses energy from tides
- nuclear energy-uses energy from splitting up atoms
-
explain sustainable. list ex. of sastainable practices
- sustsainable refers to the ways that humans can use up resources without using them up.humans who live sustainbly reduce the impact they have on the enviroment
- ex.
- bike or walk
- use energy efficient appliances
- add insulation turn heat down in winter opposite in summer
- recycle
- organic farming using alternative energy sources
|
|
