all of the individuals of one species occupying a particular area
consists of fine particles such as dust, pollen, mold, ash and soot that are in the air.
a colorless, odorless gas found in car exhaust that contributes to air pollution and makes people ill.
the largest number of individuals of a particular species that the environment can support
substances that contaminate the environment.
Acidic moisture that falls to earth in the form of rain or snow.
scale used to measure how acidic or basic something is
the careful use of earth materials to reduce damage to the environment.
piling yard wastes where they can decompose gradually
substances with a pH lower than 7
using materials again
substances with a pH above 7
the clearing of forested land for agriculture, grazing, development, or logging
warm air traps cool air near the ground. This reduces the capacity of the atmosphere to mix materials
the hazy, yellowish brown blanket of smog that is sometimes found over cities – forms with the help of sunlight
the volume of water flowing past a point per unit of time. Increases when more water enters it’s channel
an area where each day’s garbage is deposited and covered with soil
Substance that contains human waste, household detergents and soaps
chemicals that help plants grow
wastes that are poisonous, cause cancer, or that can catch fire easily
pollution that enters water from a specific location such as a drainpipe or ditch
substances that destroy pests, to keep insects and weeds from destroying crops and lawns
pollution that enters a body of water from a large area, such as lawns, construction sights and roads
loose material, such as rock fragments and mineral grains, that is moved by erosion
Review Basketball!
Ch. 20-21
Paving land _____ stream dischargeDecreasesIncreasesPreventsDoes not affect
_____ are substances that contaminate the environment.EnzymesFossil fuelsPollutantsStream discharges
Population explosion refers to the _____Estimated world population in
2025Number of people who live in
povertyWorld population in 1810Increased rate at which the
population is growing
One cause of population explosion is _____Air pollutionPoor nutritionBetter nutritionCutting trees
A land use that does NOT cause environmental problems is _____Grazing livestockUsing herbicidesSetting aside natural preservesCutting trees
Recycling materials helps save _____EnergyLandfill spaceBothNeither
A growing population puts demands on the land for _____FoodLiving spaceLandfills for trashAll of the above
Composting means piling up grass and leaves so they can be _____Collected with garbageCollected separately from garbageAllowed to gradually decomposeUsed for cattle food
People can help protect the environment by _____ReusingRecyclingCompostingAll of the above
Earth’s population is rapidly increasing because of all of the following EXCEPT:Modern medicineRate of reproduction has
decreasedBetter sanitationBetter nutrition
_____ makes up 40% of the mass of trash.CompostFoodPaperAluminum cans
A combination of smoke and fog is _____OxygenAcid rainFossil fuelsSmog
Smog development is affected naturally by _____.The pH scaleThe greenhouse effectLandformsAll of the above
Sunlight reacts with waste gases to form _____.Carbon dioxideUltraviolet radiationOzoneNone of the above
A cause of acid rain is _____The exhaust from carsEmissions from coal burning
power plantsMoisture in the airAll of the above
Mountains may contribute to smog formation by _____Emitting sulfurous compoundsBlocking cloudsBlocking air circulationLimiting water runoff
Water pollutants include:PesticidesFertilizersSedimentAll of the above
Farms pollute water through the use of _____Pesticides and fertilizersHospital wasteCFC’sAll of the above