Unit 4 Flashcards

1
Q

What happens at a convergent boundary (exps)

A

Earthquakes, subduction, nonvolcanic mountains, trench, volcanoes

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2
Q

What happens at a divergent boundary (exps)

A

Earthquakes, mid ocean ridge, rift valleys

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3
Q

What happens at a transform boundary (exps)

A

Earthquake, fault lines

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4
Q

What is total fertility rate (TFR)

A

The average number of a woman has in her lifetime

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5
Q

What is Replacement-level fertility

A

TFR needed to offset deaths and keep the population stable

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6
Q

What are Replacement-level fertility numbers

A

MDCs= 2.1
LDCs= less than 2.1

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7
Q

What is crude birth rate

A

The number of live births per 1000 people in a population

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8
Q

What is life expectancy

A

The number of years a person is alive

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9
Q

What is infant mortality rate (IMR)

A

The number of babies out of 1000 born who die before their 1st birthday

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10
Q

What crude death rate

A

The number of deaths per 1000 people in a population

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11
Q

What is factory fishing

A

Highly industrialized, huge vessels capture fish in bug volumes to process and freeze fish while at sea

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12
Q

What are driftnets

A

Nets hang vertically from floats, unattached to the sea floor

Catches a wide variety

Lots of bycatch

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13
Q

What is trawling

A

Net is attached to the back of a boat and pulled through the water

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14
Q

What is midwater (pelagic) trawling

A

Towed through free water

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15
Q

What is bottom (benthic) trawling

A

Towed along the sea floor

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16
Q

What is purse seining

A

Net is weighed down with a series of rings. The line is pulled that draws the net together.

Schools of fish

Bycatch is dolphins

17
Q

What are longlines

A

A long line of baited hooks attached at intervals. Can be placed at different heights

Bycatch is seabirds

18
Q

What is Maximum Sustainable Yield (MSY)

A

Fishing efforts and harvest match the amount of fish produced by reproduction

To cause no further decline in populations

19
Q

What are marine protected areas (MPA)

A

Areas where no one can fish

20
Q

Effects of marine protected areas

A

Employs previous fishers in research and enforcement

Sets aside critical habitat long-term

Increased fish biomass and total catches outside of the MPA