What happens to dissolved oxygen levels DURING and then AFTER eutrophication?

during they increase dramatically, after drop to almost zero

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APES 8-9

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Friedland and Relyea Environmental Science for AP chapters 8-9 review

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1
the bigger the particle size, the _____ permeable the soil is
more
equal amount
extremely less
less
2
which soil horizon would be most susceptible to erosion and weathering?
B horizon
E horizon
A horizon
C horizon
3
What happens to dissolved oxygen levels DURING and then AFTER eutrophication?
during they increase dramatically, after drop to almost zero
dissolved oxygen levels increase during/after eutrophication
during they drop, after increase dramatically
dissolved oxygen levels drop during and after eutrophication
4
oligotrophic lakes are generally
not very productive
not able to have much light reach the bottom
extremely productive
able to have a lot of light reach the bottom
5
What percent of the earth is saltwater?
95%
99%
90%
97%
6
Includes the crust and part of the upper mantle
outer core
lithosphere
magma
asthenosphere
7
which soil horizon is the parent material usually found on?
A horizon
B horizon
C horizon
O horizon
8
Which has a larger recharge zone?
artesian well
unconfined aquifer
cone of depression
confined aquifer
9
which is the oldest and least efficient method of irrigation?
drip irrigation
furrow trench
spray irrigation
flooding
10
hydroponic growing involves removal of which part of typical plant growing
soil
water
nutrients
light source
11
Plate tectonics can result in which of the following
volcanic activity
earthquakes
new mountain ranges
all of these
12
gray water is suitable for
drinking
washing clothes
washing cars
taking a bath in
13
which method involves keeping seawater contained
dams
dikes
furrow trenches
levees
14
40% silt, 40% sand, 20% clay
sandy clay loam
medium loam
sandy loam
silt loam
15
________ weathering can result in new substances being formed
erosion
chemical
physical
mechanical

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