Chapter 12. Flashcards
(26 cards)
Increased clearing of grasslands, draining of swamps and deforestation to create farmland…
lower the number of species present &
is called habitat fragmentation
The study of large land masses that cover the Earth and move about bumping and grinding into one another is called…
Plate tectonics
Which of the follwing approaches would be least beneficial in trying to reduce insect damage…
Planting polycultures
Earthquakes are the release of potential energy from the movement of tectonic plates. The point underground where this occurs is called
the focus
Rocks containing enough mineral to be profitably mined is called
Ore
Tectonic plates slide and grind parallel to one another at a(n)
Transform fault
(Plates side parallel vs convergent (upwards) and convergent (ocean crust is subducted under land plate towards the continental crust)
The March 2011 tsunami that impacted Japan
Was the strongest ever recorded and resulted in a massive tsunami
Volcanoes occur in what type of locations
At regional hot spots where magna pools under the crust
at convergent plates that create subduction zones that feature earthquakes
Reclaiming lands around derelict mines involves the following except:
Replanting with natural vegetation only
there’s more
Which of the following is not true about agriculture?
a. there is enough food to feed everyone
b. industrialized agriculture involves large energy inputs
c. the main reason for malnutrition is poverty not poor agricultural
c. the main reason for malnutrition is poverty not poor agriculture
Traditionally farmed soils have no O (organic) horizon.
True or false?
True
As the top organic layer (O horizon) is often tilted under and over used for growing heavy crops like corn which uses lots of Nitrogen
Slag, a waste product of smelting ores, is a combination of worthless ore and limestone.
True or false?
True
The dirt wall left after strip mining is called a spoil bank and is composed of underburden.
True or false?
False
Conservation tillage is a method used ages ago by farmers which is now practiced using the same old equipment.
True of false?
False
Iron ore is a kind of rock that contains an abundance of iron.
True or false?
True
The Farm Bill of 1985 (Food Security Act) required farmers with highly erodible land to produce a 5 year conservation plan that included erosion controls.
True
Organic farming is growing in populaty. To comply organic foods must be grown on soil without pesticides for _____ years
3 years
______ is a growing practice on US farms in which crop residues are left in the field to minimize nutrient loss and help establish the following year’s crops.
Conservation tillage
____ rock forms when a preexisting rock is subjected to high temperatures and pressure.
Metamorphic
Subsurface mining for coal is often more dangerous than other mining operation because of the danger of _____ in a mine.
collapse
Gold mining for precious metals creates large heaps of toxic ____ as a solid waste product that are not usually reclaimed in developing countries.
Tallings
Organic material in soil that remains after extended decomposition and is composed of a mixture of organics and minerals that can retain water is called
Humus
Pests/ weeds may develop _______ as a result of the continual usage of the same pesticide/ herbicide on the same type of crop year after year
Resistance
_______ is/ are used on modern sustainable farms as methods of controlling pest without using dangerous and persistent chemicals.
Crop rotation
