Environmental Science Exam 1 - Bert Johnson | Biblioteka

8

Match the following bodies of water with their description

Stavka koja se može prevući		Odgovarajuća stavka
Colorado River		the largest lake in California
Lake Owens		the source of water for the Salton Sea
Salton Sea		a healthy saltwater lake in Northern California that has been restored since lawsuits stopped Los Angeles from draining the rivers that feed it
Lake Mono		A dry lakebed in Northern California that has gone dry since the Los Angeles aqueduct drained the rivers that feed it

8

Match the following types of chemicals in the Salton Sea with description

Stavka koja se može prevući		Odgovarajuća stavka
Sodium and Chlorine		Naturally occurring, disease causing heavy metals that have been concentrated in the Salton sea as large amounts of water evaporated
Hydrogen Sulfide		Chemicals, some of which are no longer legal because concerns about their toxicity to people or wildlife, that have been put on fields by farmers and then drained into the Salton Sea
Pesticides, Herbicides, and Fertilizer		The most common highly soluble ions that are leached from rocks into rivers and then concentrate in ocean and saline lakes with no outlet
Arsenic, Mercury and Lead		a naturally occurring gas released by bacteria in the sediment at the bottom of the Salton Sea that sometimes get trapped or released as a large bubble of smelly gas that the wind can blow for many miles

5

Which of the following have contributed to large number of fish dying in the Salton Sea (several may apply)

Increased water temperature that decreases Oxygen levels and cause fish to suffocate

brine from desalination plants being drained into the Salton Sea

Other toxins that may not be healthy for fish

Increased salinity (Sodium chloride concentrations) that some species cannot tolerate as water evaporates

Decreased water volume that causes there to be less carrying capacity for the number of fish that used to thrive there

4

Which of the following have reduced water levels in the Salton Sea

Lining the All-American Canal so that less water from the Colorado River leaks into the aquifer draining into the Salton Sea

Increased water use for golf courses reducing groundwater levels draining into the Salton Sea

Drip irrigation, letting fields go unplanted, and other methods farmers use to reduce water reducing groundwater draining into the Salton Sea

Increasing the quantity of water transferred from the Colorado River to San Diego and other coastal cities while decreasing the quantity of water sent to the Coachella Valley

10

Match the following locations with the plate boundary they are closest to (some may be used more than once)

Salton Sea
Japanese Archipelago
Coachella Valley
Dead Sea in Israel
Central Valley
Mid-Atlantic Ridge
Imperial Valley
Gulf of California (Sea of Cortez)
Himalayan Mountains
Andes Mountains

Pacific Plate & North American Plate
South American Plate and Nazca Plate
Indian Plate and Eurasian Plate
African Plate and Arabian Plate
North American Plate and Eurasian Plate

8

Match each location or description with the type of plate boundary that matches it

Himalayan Mountains on boundary between China and India
Dead Sea in Israel
Mid-Atlantic Ridge
San Andreas Fault
Andes Mountains in South America
Subduction Zone
Philippines
Volcanoes often form beside these

Convergent boundary
Transform boundary
Divergent Boundary

9

Which of the following is true of convection

It is circular motion of matter

in which warmer fluids rise

and move sideways as they cool

then fall after they cool

then move sideways as they start to warm again

it can happen in liquids

it can happen in gases

it can happen in solids

the sideways movement of cooling magma in a convection cell is what causes continental drift

9

Match each rock or description with the type of rock that matches it

formed from cooling magma or lava
formed from other rocks chemically and structurally altered after being exposed to heat and extreme pressure
Marble
Limestone
Sandstone
formed from weathered rock particles cemented together
Granite
Quartzite
Obsidian

Igneous
Sedimentary
Metamorphic

10

Match the following process with its description

Stavka koja se može prevući		Odgovarajuća stavka
eruption		movement of rocks or soil by wind or water
subduction		break down of rocks into small particles by wind or water
continental drift		pushing of one continental plate under another
weathering		pressurized magma pushing up through the earth's crust
caldera		movement of continental plates across the surface of the world
erosion		a large volcanic crater formed from an eruption followed by the collapse of the mouth of the volcano

7

Describe which was true at the Aral Sea

The Aral sea had no outlet

The water in the rivers that fed the sea were diverted to grow cotton and other crops

The Sea was rapidly drying up, exposing the dry seabed to the wind and destroying the environment and economy of communities around it

Kazakhstan built a dam to separate the sea into a higher North Aral Sea and a lower South Aral Sea

The North Aral Sea is now more salty than the South Aral Sea

Coastal communities on the North Aral Sea now have many jobs fishing again

Nothing can grow on the dry seabed once covered by the Aral Sea

20

Some people say the Salton Sea was an accident, and restoring it to a condition where it was a clean and popular destination is impossible or not worth the cost, its best to just let nature take its course. Write seven sentences on why you agree or disagree with that statement.