Environmental Science Ch. 15 and 16
DDT is harmful to the environment because it
All of the above (does not break down quickly into harmless chemicals, concentrates in the bodies of animals high in the food chain, causes some birds to lay eggs so thin that they break when the birds sit on them)
Farmland may become desertified if
All of the above (domestic animals are allowed to overgraze the land, too many crops are grown on the land and the land gradually loses its fertility, as a result of erosion, there is no fertile soil left to grow plants)
Surface mining can cause
Both air and noise pollution
What is one property that may be used to distinguish metallic from nonmetallic minerals?
Electrical conductivity
Metallic Minerals conduct
Electricity
The loss of fertile soil when it is blown away by wind or washed away by water is called
Erosion
The name for a widespread food shortage that results in many people not having enough food is called an
Famine
Which of the following best describes why many people in the world go hungry?
Food production has not been increasing as fast as the human population
An open pit used to mine minerals near the surface is called a
Quarry
The land recovery process required of mine operators is called _____
Reclamation
Reclamation is the process of
Returning land to its original or better condition after mining
Irrigation water usually comes from
Rivers and groundwater
The accumulation of salts in the soil, which can be caused by irrigation and low rainfall, is called
Salinization
The upper layer of soil consisting of rock particles, water, air, and organic matter is the
Top soil
A quarry could also be called
An open pit
One potential way to deal with the problem of seafood overharvesting is by intensifying ____ efforts.
Aquaculture
Evaporites most commonly form in
Arid regions where rates of evaporation are high
Erosion is most likely when the soil is
Bare and exposed to wind and rain
Pest populations that damage plants
Become resistant to pesticides via natural selection
Genetic engineering of food crops
Continues to be debated among scientist
Which of the following actions contributes to soil erosion?
Driving farm machinery over fields.
Wildlife ________ are protected by the Endangered Species Act
Habitats
Acid mine drainage
Harms or kills aquatic life
Gangue Minerals
Have no commercial value
A true statement about nutritional requirements in humans is that
Humans need to get eight essential amino acids from the protiens they eat
Products obtained from livestock include
Leather, wool, eggs, meat, and manure
The health problem caused by not eating enough necessary nutrients is known as _____
Malnutrition
More energy, water, and land are needed to produce a gram of ____ than to produce a gram of food from plants.
Meat
The minerals that conducts electricity well are called
Metallic Minerals
Through _____, mining companies can identify areas where there may be valuable mineral resources.
Mineral Exploration
Placer deposits are surface mineral deposits that have been concentrated by
Movement of wind and water
All of the following factors can cause famines EXCEPT
New, higher yield crops
Which of the following is NOT a method of subsurface mining?
Open-pit mining
Which of the following are minerals that contain valuable substances?
Ore minerals
Collapse of ____ can lead to subsidence
Pillars in abandoned mines
Solution mining is an economical mining method if mineral ores are _______ in water
Soluable
Which of the following is a water contaminant that can cause acid mine drainage?
Sulfuric Acid
The _____ sets standards to minimize the surface effects of coal mining on the environment.
Surface Mining Control and Reclamation Act of 1977
The first step in surface coal mining is
To remove and set aside the soil that covers the area to be mined
The results of the green revolution were not entirely positive because
Use of pesticides and fertilizers increased the risk of pollution
Which of the following is a good way to reduce salinization?
Using rainwater instead of groundwater on crops
Which of the following agricultural products requires the least amount of energy?
Wheat