Apes unit 4

Question 1

Alley cropping:

Answer 1

The planting of rows of trees and/or shrubs to create alleys within agricultural or horticultural crops are produced.

Question 2

Contour planting

Answer 2

The practice of tillage, planting, and other farming operations performed on or near the contour of the field slope.

Question 3

Erosion

Answer 3

The movement of soil components, especially surface litter and topsoil from one place to another.

Question 3

Anemia

Answer 3

Low levels of hemoglobin due to iron deficiency or lack of red blood cells.

Question 4

Divergent plate boundary

Answer 4

A boundary where the plates are moving away from each other

Question 5

Convergent plate boundary

Answer 5

Where two plates collide

Question 6

Transform plate boundary

Answer 6

Occur when two plates slide past each other, forming a fault line.

Question 7

Dependent variable

Answer 7

A variable that changes in response to changes in an independent variable

Question 8

Independent variable

Answer 8

The variable that is manipulated by the investigator.

Question 9

Reserves

Answer 9

The determined quantities of a mineral resource that can be economically recovered.

Question 10

Rare Earth metals

Answer 10

A concentration of naturally occurring nonrenewable material in or on the earth’s crust that can be extracted and processed into useful materials.

Question 11

Isotopes

Answer 11

A form of an element in which the atoms have more (or less) then the usual number of neutrons.

Question 12

Conservation tillage

Answer 12

Any method (no-till, strip-till, etc.) of soil cultivation that leaves the previous year’s crop residue on fields before and after planting the next crop, to reduce soil erosion and runoff.

Question 13

Acid mine drainage

Answer 13

Occurs when rainwater seeping through a mine or mine water carries sulfuric acid

Question 14

Overburden

Answer 14

The layer of earth and rock that is removed to access the minerals being mined.

Question 15

Ore

Answer 15

A rock that contains a large enough concentration of a mineral making it profitable to mine.

Question 16

Oceanic Trench

Answer 16

Long, narrow depressions on the seafloor

Question 17

Subduction

Answer 17

When an oceanic plate collides with a continental plate and rides up over the denser plate and pushes it down the mantle.

Question 18

Convection Currents

Answer 18

The transfer of heat by the mass movement of heated particles into an area of cooler fluid.

Question 19

Positive feedback loop

Answer 19

Causes a system to change further in the same direction.

Question 20

Negative feedback loop

Answer 20

A system responds to a change by returning to its original state, or by decreasing the rate at which the change is occurring.

Question 21

Malnutrition

Answer 21

Gets enough calories but not a good blend of protein and other nutrients

Question 22

Undernutrition

Answer 22

Not consuming enough calories to be healthy.

Question 23

Depletion Time

Answer 23

The time it takes to use up about 80% of the mineral reserves at a given rate

Question 24

Intensive agriculture

Answer 24

Producing enough food for a large farm family’s survival and planned surplus that is sold for a profit.

Question 25

Monoculture

Answer 25

Growing the same crop, often the same genetic variety of the same crop, across an entire field.

Question 26

Poly culture

Answer 26

A method for reducing pest and disease problems by planting more than one crop in a field at the same time.

Question 27

Tipping point

Answer 27

Point at which an environmental problem reaches a threshold level, which causes an often irreversible shift in the behavior of a natural system.

Question 28

Synergistic interaction

Answer 28

Two or more processes interacting such that the combined effect is greater than the sum of the individual effects