Chapter 15
Chapter 15
Chapter 16
Chapter 16
Chapter 16
100
The amount of a crop produced per hectare (or acre) is called
What is yield
100
In farming, a(n) ___ is any organisms that occurs where it is not wanted, or in large enough numbers to cause economic damage.
What is a pest
100
What can contaminate a river due to dredging?
What is muddy sediments
100
Two ways ore minerals can form.
What is cooling of magma, circulation of hydrothermal solutions through rock, solar evaporation.
100
What is a quarry also called?
What is open pit.
200
A modern method of controlling pests on crops that seeks to reduce but not eliminate pest population is called
What is integrated pest management
200
The most common form of aquaculture, the ____, consists of many different individual ponds.
What is fish farm.
200
What is the main difference between a metal and a nonmetal?
What is electrical conductivity
200
What is contained in hot, subsurface water identified as hydrothermal solutions?
What is dissolved minerals.
200
What is overburden?
What is rocks that cover coal seams near the surface
300
The health problem caused by not eating enough necessary nutrients is known as
What is malnutrition
300
Goat, sheep, cattle and other ___ are cud-chewing mammals with multi-chambered stomachs.
What is ruminants
300
What are placer deposits?
What is surface deposits concentrated by wind and water.
300
How much of the world's salt comes from solar evaporation?
What is 30%.
300
What are ore minerals?
What is minerals that are economical to extract
400
The name for a widespread food shortage that results in many people not having enough food is called
What is famine
400
___ refers to water that is used for crops.
What is irrigation
400
What is a serious hazard of coal mining?
What is mine fires
400
Why is undersea mining not successful?
What is too expensive and ocean depths make it difficult.
400
What is slag?
What is the layer of impurities that forms atop molten metal during smelting.
500
The upper layer of soil consisting of rock particles, water, air, and organic matter is the
What is topsoil
500
Negative effects of the green revolution include soil degradation as well as the over use of water, _____, and fertilizers.
What is pesticides.
500
Give two characteristics of minerals.
What is naturally occurring, inorganic solids, have a uniform internal structure.
500
What has to happen for mining to be profitable?
What is the price of the final product must be greater than the costs of extracting and refining.
500
What is the sinking of regions of the ground with little or no horizontal movement?
What is subsidence.
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