exam 3 study guide Flashcards
(67 cards)
What is the definition of geology? What are the three different zones of earth?
Study of dynamic processes taking place on the earth’s surface and in its interior
Three major concentric zones of the earth
Core
Hot minerals
Mantle
Less dense region, magma
Crust
Complex mineralogical composition, iron, calcium, aluminum, on the land
Continental crust
Oceanic crust = 71% of crust
Know definitions of mineral and rock.
Mineral
Naturally occurring chemical element or inorganic compound that exists as a crystalline solid
Rocks
brandt, limestone sandstone
We mine for gold and salt
Know the different types of rock
and how related to the rock cycle
Rock cycle
Named by the way in which they form
Sedimentary rock
Made of sediments
Formed thru transportation of water, wind, gravidity, accumulate in layers (sandstone, limestone shale)
Tiny particles of weathered and eroded types of rocks deposited and accumulate in layer
Metamorphic rock
Existing rock subjected to high temperatures, pressures, fluids, or a combination
Igneous rock
Forms under intense heat and pressure then cools
What are examples of geological activity related to tectonic plates?
Convergent
Plates moving toward each other, collide
Volcano, mountain ranges
Divergent
Move away
Transform plate boundary
Move in opposite directions BUT PARALLEL
What is the difference between a high grade and low grade ore?
Ore
Deposit in earth’s crust with one or more valuable minerals
Contrians profitable concentration of a minera
High grade or low grade
High grade ore more sustainable to mine
What are general trends we see with production and reserves for rare earth minerals?
Rare earth minerals
Produce lots of waste
China dominates in processing
What are the different mining techniques we discussed?
Surface and stip mining
Removes shallow deposits
Extracting deposits in horizontal beds close to the earths surface
Open pit mining
Dig large pits to remove ore
Mountaintop removal
Explosives to remove top of mountain to expose underground area for access
Environmental probs of mountaintop removal
U pollute water bodies
More erosion
Risk of flooding
Subsurface mining
Underground shafts elevators tunnels to get to mineral
What are some environmental and human health issues we discussed with mining?
Human health effects - resource extraction - mining
Ore extracted by mining
Ore mineral
Tailings is the waste polluted water slurry
Chemicals in here
Could be leftover sediment
Smelting
Roast ores heat ores
Heat and chemicals
Result
Air pollution
Water pollution
Human health effects
Dangerous for miners- can develop black lung
details on the gold mining case study in the Ivory Coast that we discussed in lecture.
Using toxic mercury to aggregate the gold
And it goes back into the soil via waste
biomining
Using living organisms to mine particular minerals of interest
Microorganisms able to clean salt water
Understand the dynamics of volcanoes, earthquakes, tsunamis, and glaciers discussed in lecture. Know corresponding terms and any specific locations discussed.
Volcanoes
Release molten rock from the earth’s interior
Magma rising to earth’s surface thru a fissure in earth’s surface
Eruption: release of hot ash into the air
Mt vesuvius destroy pompeii
Earthquake
Breakage and shifting of rocks
Occurs at a fault
Seismic waves
Vibrations in the crust
Focus
Origin of where earthquake occurs
Magnitude of earthquake is the severity
Haiti
Experienced a 7.2 magnitude
earthquake
Richter scale
It measures magnitude of the earthquake (amplitude of wave)
Largest recorded: 9.5 in chile, 1960
Earthquakes on the ocean floor
Cause tsunamis
Series of huge waves generated when ocean floor suddenly rised or drops
December 2004-indian ocean tsunami
Magnitude 9.2
230,0000+ lost lives
Japan
Nuclear radiation from it
Glaciers
Sheets of icermed from snow pack
Most occur on land but can extend out to sea
Climate change recedes them
Distinct landforms
Mounded hills: moraines, drumlines
Bodies of water: kettle lakes
Know the defining
features of the troposphere and stratosphere.
Atmosphere
Composition of gases
78% nitrogen and 21% oxygen
Innermost layers of the atmosphere
Troposphere
Stratosphere
What are greenhouse gases
CO2, methane, nitrous oxide, water vapor
Can trap heat in the atmosphere - like a blanket
They are natural, we need them to survive
Urban heat island effect
Urban heat island effect- a microclimate
Urbanized areas that experience higher temps than outlying areas
Albedo effect
How much sunlight is reflected from earth’s surface, then held onto. Light surfaces reflect more than darker surfaces
What are the different methods scientists use to understand climate and climate change?
Benefits of tree planting
Stormwater retention
Provide shade
Thermoregulation, evapotranspiration
aesthetic
Not absorbing heat thru black top
What are the effects of climate change?
Climate change effects
Global warming
Sea ice reduction
Dying polar bears
See temps rise
Melting glaciers
How do we know recent change is caused by humans?
IPCC
Intergovernmental panel on climate change
Scientists + gov representatives to review causes effects and data surrounding climate change
Every 6-7 years or so
Aim to limit going 1.5 degrees above the pre industrial temperature
Temperature over time (form pre industrial) to keep it under
What are features of the Paris Agreement?
International climate change agreement each country expected to lower GHG emissions with the overall goal of limiting the earth’s average temp increaser to below 2 degrees celsius - pre industrial level
1.5 degrees → decided it is better not to go above
What are solutions to climate change that we went over in lecture?
Air Pollution
Solutions to climate change
Clean energy tax credits
EPA regulations on power plants
Auto industry regulations-switching to EV vehicles
What are examples of natural sources vs. human sources of air pollution?
Natural sources
Windblown dust, wildfire residue, volcanic eruptions
Human sources
Power Plants
Industrial facilities
Motor vehicles
What does the Clean Air Act do? For are the six major pollutants covered in the Clean Air Act?
Clean air act
Natural ambient air quality stickers
6 criteria pollutants
Transportation powerplants- main emitters of pollutants
PM particulate matter
Sulfur dioxide
Carbon monoxide
Nitrogen dioxide
Ozone in the stratosphere (troposphere its a pollutant
Primary pollutant
Released directly from the source into the air in a harmful form
Carbon, sulfur
What is the difference between primary and secondary pollutants?
Examples?
Primary pollutant
Released directly from the source into the air in a harmful form
Carbon, sulfur
Secondary pollutant
Converted to a hazardous form after they enter the air or are formed by chemical reactions as components of the air mix and interact
Ozone
Needs sunlight to form that reaction
Know some features that we went over in lecture about each of the air pollutants
discussed.
Major outdoor air pollutants
Sulfur dioxide and sulfuric acid
Harmful pollutants
Colorless corrosive gas
Coal and oil
Ore go thru smelting that can release sulfur dioxide into the atmosphere
Water vapor and sulfuric acid → breaking down chlorophyll in leaf acid rain, statues disintegrating
What trends do we see with acid rain across the U.S.?
Nitrogen oxides
Highly reactive gasses that forms with nitrogen heated air to a particular temperature in the presence of oxygen
Can react w water= nitric acid
Nitric acid and sulfuric relate to acid rain
Acid rain
Rainfall in 1986 more acidic bc more sulfur dioxide issues + nitrogen oxide pollution
Seen in forests at high altitudes dying off