Comprehensive Regents Study Guide: Earth and Space Sciences

Examination Protocols and Required Resources

• Prohibited Items: The possession or use of any communications devices is strictly prohibited. Use of such devices, even briefly, results in the invalidation of the examination and no score calculation.

• Required Documentation and Tools:

  • Students must use the 2024 Edition Reference Tables for Earth and Space Sciences.

  • A four-function or scientific calculator must be available.

  • All constructed-response answers must be written in pen, except for graphs and drawings which should be in pencil.

• Scientific Integrity Declaration: Students must sign a declaration upon completion, stating they had no prior knowledge of questions/answers and neither gave nor received assistance.

• Scale Warning: Diagrams in the test booklet are not drawn to scale unless explicitly noted.

Evidence for the Big Bang Theory and Universe Evolution

• Definition: The Big Bang is a physical theory describing the expansion of the universe from an initial state of high density and high temperature, explaining changes over time.

• Key Supporting Evidence:

  • Element Abundance: The measured amounts of elements throughout the universe.

  • Accelerating Expansion: The observed movement of space growing larger at an accelerating rate.

  • Cosmic Microwave Background Radiation (CMBR): The discovery of energy distributed throughout the universe that was predicted by scientists.

• Evolutionary Timeline of the Universe:

  • $0$ Seconds: Big Bang event begins.

  • $10^{-32}$ Second: Inflation phase occurs.

  • $1$ Microsecond: Protons form; temperatures reach approximately $10$\text{ billion Kelvin } ($10^{10}\,K$).

  • $0.01$ Second to $20$ Minutes: Nuclear fusion begins and concludes; sub-atomic nuclear particles combine; light is scattered by sub-atomic particles.

  • $380,000$ Years: Atmosphere reaches $3000\,K$; the universe becomes transparent as light is no longer scattered; neutral hydrogen forms; CMBR is released.

  • $13.8$ Billion Years: Modern universe; temperature variations correspond to galaxy formation; elements have formed.

• CMBR Characteristics:

  • It is energy predicted by scientists and distributed throughout the universe.

  • It is detectable because the universe cooled and became transparent.

  • Variations in CMBR indicate that galaxies formed in areas of higher density.

Galactic Observations and Hubble’s Law

• Cepheid Variables: Stars that brighten and fade in a predictable pattern, used by astronomer Edwin Hubble in the 1920s to determine distances to galaxies.

• Hubble's 1929 Graph:

  • X-axis: Distance from Earth measured in parsecs ($1\,\text{parsec} = 3.26\,\text{light years}$).

  • Y-axis: Recessional velocity of a galaxy (speed relative to Earth) in $km/s$.

  • Observation: Galaxies traveling toward Earth have negative recessional velocities. The graph shows a proportional relationship where galaxies farther from Earth have greater recessional velocities.

• Red-Shift Data: Evidence for the speeds of most galaxies on Hubble’s graph is obtained from red-shift data, indicating movement away from the observer.

• Cosmological Implications: The data supports the Big Bang by showing an expanding universe where distance is proportional to velocity.

Stellar Characteristics and Nucleosynthesis

• Comparison of Betelgeuse and The Sun:

  • The Sun: Mass = $1.99 \times 10^{30}\,kg$. Composed of Hydrogen and Helium.

  • Betelgeuse: Mass = $3.28 \times 10^{31}\,kg$. Composed of Helium, Carbon, Oxygen, Neon, Magnesium, Sodium, and Iron.

• Lifespan and Fusion:

  • Massive stars like Betelgeuse have shorter lifespans than the Sun because their higher mass results in higher core pressure and temperature, accelerating the rate of nucleosynthesis (fusion of heavier elements).

  • Betelgeuse has already fused helium into heavier elements (up to iron in the core).

Marine Plastic Pollution and Global Ocean Circulation

• The Ever Laurel Accident (January 10, 1992): A container ship lost twelve 40-foot containers in a storm; one released over 28,000 plastic bath toys into the Pacific Ocean. These toys traveled along currents for years.

• Great Pacific Garbage Patch (GPGP):

  • Size: $1.6\text{ million square km}$, approximately 11 times the size of New York State.

  • Location: Found within ocean gyres where water conditions are calm.

  • Composition: Small fragments, fishing gear, floats, crates, buckets, and food/drink containers.

• Circulation Factors:

  • Toys reached North America by moving along the North Pacific Current, followed by the Alaska Current.

  • Global circulation of ocean currents is caused by the location/distribution of landmasses and density/heat energy differences.

  • Prevailing winds are a primary non-current factor determining the global circulation of plastic debris.

• Biological Impacts:

  • Bioaccumulation: Plastics break down into microplastics, which are ingested by plankton, then transfer through fish to humans.

  • Mistaken Identity: Sea turtles often eat plastic bags and sheets, mistaking them for jellyfish.

Design Solutions for Waterway Cleanup

• River Removal Method:

  • Design: Barriers at river mouths funnel plastic into a collection area for manual removal.

  • Pros: Lower cost, locally constructed, captures plastic before it enters the ocean (protecting biodiversity).

  • Cons: Ineffective for microplastics (< 1\,mm), manual labor required, reduced capture during low water flow.

• Ocean Removal Method:

  • Design: Giant C-shaped tube (artificial coastline) with a three-meter deep skirt; uses a sea anchor to slow movement against wind-driven plastic.

  • Pros: Effective over large areas, removes large volumes, does not impact community aesthetics.

  • Cons: High maintenance/downtime due to equipment breakage, impacts surface aquatic life to a depth of $5\,m$, requires support vessels for transport.

Evolution of Early Earth Systems: The Great Oxidation Event (GOE)

• Timeline: Microbial life (cyanobacteria/stromatolites) evolved in oceans around $2.7\,Ga$ (billion years ago).

• Mechanism: Photosynthesis used water as fuel to produce oxygen. Oxygen levels increased in seawater for 200–300 million years before escaping to the atmosphere.

• Atmospheric Reaction: Atmospheric oxygen reacted with methane ($CH_4$), causing methane levels to de’crease and oxygen levels to increase ($2.4$ to $2.1\,Ga$).

• Climatic Impact: Methane is a potent greenhouse gas. Its removal led to less energy being absorbed by the atmosphere, resulting in the Huronian ice ages (the planet's surface was almost entirely frozen).

Geologic Evidence of Glaciation and Ocean Chemistry

• Huronian Supergroup: A 12-kilometer thick geologic formation providing evidence of major glacial episodes from $2.4$ to $2.1\,Ga$.

• Dating Methods: The age of formations is determined using the ratio of Uranium to Lead isotopes in rocks.

• Dropstones: Embedded volcanic or sedimentary fragments within marine sediments. These are evidence of glaciers carrying rocks to sea and dropping them into marine mud.

• Banded Iron Formations (BIFs): Oldest sedimentary rocks formed in oceans. They provide evidence for the presence of free oxygen: Iron ions entering the ocean from black smokers (hydrothermal vents) reacted with oxygen to form banded iron rock layers on the ocean floor.

• Temporal Sequence of Events (Oldest to Youngest):

  1. Formation of Earth ($4.6\,Ga$).

  2. First oceans form ($4.2\,Ga$).

  3. Iron enters the ocean from black smokers.

  4. First appearance of banded iron formations ($3.8\,Ga$).

  5. The Great Oxidation Event ($2.4\,Ga$).

Mineral Resources and Land Reclamation in New York State

• Adirondack Mineral (Garnet): Used primarily as an abrasive. Properties: Dark red, glassy luster, colorless streak, scratches glass, breaks into uneven pieces with sharp edges.

• Limestone and Dolostone: Third largest mining industry in NYS; used as crushed stone for construction. Availability of these minerals influenced the historical placement of major highways in NYS.

• Mine Reclamation: Returning mined land to usable conditions.

  • Woodbourne Flats Mine (Sullivan County): Involves planting 600 indigenous black willow trees and creating a 35-acre pond.

  • Black Willows: Function to stabilize river banks and reduce the impact of flooding events.

  • Ponds: Function to capture runoff and reduce sediment release into nearby rivers.

  • Pond Vegetation: Stabilizes slopes and restores the original ecosystem.

Sustainable Infrastructure: Recycled Asphalt Pavement (RAP)

• Methods Comparisons:

  • Natural Materials: Requires quarry blasting, trucking over several miles, and 3–7% emulsifier.

  • RAP: Milling machines grind existing road surfaces on-site; uses 1–3% emulsifier. No trucking or new mining required.

• Economic/Environmental Benefits: RAP does not require reclamation, extends the lifespan of existing quarries, and significantly reduces carbon emissions.

• Carbon Emissions Relationship: Increasing the RAP Blending Ratio (%) results in a decrease in Carbon Emissions ($kg\,CO_2/m^2$), leading to decreased global warming potential.

Celestial Mechanics of the Pluto-Charon System

• System Overview: Pluto has five moons: Charon (largest), Hydra, Kerberos, Nix, and Styx. Charon is about half the size of Pluto, forming a binary system.

• Moon Data (Average Orbiting Distance / Eccentricity):

  • Charon: $19,640\,km$ / $0.0022$

  • Styx: $42,656\,km$ / $0.0058$

  • Nix: $48,694\,km$ / $0.0020$

  • Kerberos: $57,783\,km$ / $0.0033$

  • Hydra: $64,738\,km$ / $0.0059$

• Kepler’s Third Law: States that orbital period increases with distance from the primary body. Ranking from shortest to longest period: Charon, Styx, Nix, Kerberos, Hydra.

• Tidal Locking: The rotational period and orbital period of Charon are both exactly $6.4$ Earth days, meaning the same side of Charon always faces Pluto.

• Orbital Dynamics: Both orbital speed and gravitational attraction for these moons are NOT constant due to elliptical orbits (eccentricity).

Paleogeography and Climate Change: Doggerland

• Doggerland: A land bridge connecting France to England, occupied by humans until it was submerged between 20,000 and 9,000 years before present (ybp).

• Climate Shift in Ireland: Over the last 18,000 years, shifts moved from glacial coverage to current conditions. The North Atlantic Current caused temperatures and humidity to increase in Ireland.

• Storegga Slide (8200 ybp): An underwater landslide that triggered a massive tsunami. Coastlines like the Shetland Islands experienced destructive erosion. Tsunami heights varied (e.g., $10\text{ to } 20\,m$ near the slide, decreasing at locations like Hommelstø).

• Transportation Impact: The modern Eurostar train releases only $6\,g/km$ of $CO_2$ per passenger, compared to short-haul flights ($255\,g/km$). This primarily reduces impact on the Atmosphere.

Greenland Glacial Ice and Feedback Loops

• Ice Sheet Characteristics: Maximum thickness is $3205\,m$. Ice thins to $0\,m$ at the coastlines (exposed land).

• Ice Mass Loss: From 1971 to 2022, Greenland lost significant ice mass. Recent rates (2010–2022) show a loss of approximately $250\,Gt/year$ ($Gt = \text{gigatons}$).

• Albedo Effect (Reflectivity):

  • Fresh Snow: 85–95% reflection.

  • Sea Ice: 60% reflection.

  • Bare Ice: 50% reflection.

  • Soil/Exposed Ground: 5–30% reflection.

  • Ocean: 5–10% reflection.

• Feedback Mechanism: As ice melts, more dark soil is exposed. Soil absorbs approximately 80% more radiation than bare ice. This causes increased energy to flow into Earth's surface, triggering regional warming and sea-level rise.

• Ocean Salinity Dynamics: Melting ice adds freshwater to the ocean, decreasing salinity and density. This prevents warm water from moving north and sinking, potentially stalling the North Atlantic current circulation.

Asteroid Bennu and Planetary Defense

• Bennu Profile: Age $4.6\,Ga$, mean distance $1.1\,AU$. Origin likely near Neptune ($30\,AU$) due to presence of carbon monoxide ice.

• Collision Potential: There is a slight chance of impact with Earth in the year 2182. A collision requires the orbits of Bennu and Earth to intersect at the same time and location.

• Redirection Options:

  • DART (Double Asteroid Redirection Test): Kinetic impact to change orbital speed/trajectory. Potential for debris risk.

  • Nuclear Warhead: Force to alter path. Rapid change but risk of debris.

  • Yarkovsky Effect: Continuous, slow orbital change based on solar radiation albedo. Could be enhanced by painting the asteroid or using foil.

• Gravitational Pull: The speed of the DART spacecraft increased before impact due to the gravitational pull of the target (Dimorphos).

Fluvial Geomorphology and Letchworth Gorge

• Geologic Context: Rock layers consist of Upper Devonian shale and sandstone. Sandstone is more resistant to erosion by the Genesee River than shale.

• Mount Morris Dam: Built to control water levels, reducing flooding and property loss for downstream residents in Rochester, NY.

• Hiking Hazards: Locations at the top of vertical faces are safer than those near steep slopes or undercuts where gravity-induced landslides and weathering are more likely.

• Rock Layer Formation: Constructed through the burial, compaction, and mineral precipitation of sediments.

Copper Mining and Electric Vehicles

• Environmental Hazards of Mining: Deforestation, groundwater contamination, acid mine drainage, and particulate/toxic waste.

• Resource Comparison (Gas vs. Electric Cars):

  • Electric Car: Uses $53.2\,kg$ of copper (over 1 mile of wiring) and $185\,kg$ of other minerals in the battery. Releases $32\,g/mile$ of $CO_2$.

  • Gas-powered Car: Uses only $22.3\,kg$ of copper. Releases $411\,g/mile$ of $CO_2$.

• Copper Scarcity: Current known reserves (2.1 billion metric tons) are estimated to last only 105 years at 2019 production rates without new discoveries. Recycling must increase to meet long-term demand.

• U.S. Energy Projections: By 2050, Renewables are projected to surpass Natural Gas as the largest source of electric generation in the United States.

The Carboniferous Period: Biosphere and Atmosphere

• Atmospheric Conditions: Increased photosynthesis from massive swamps and forests caused oxygen levels to reach approximately 31% (modern levels are 21%). Carbon dioxide decreased significantly.

• Temperature Correlation: Lower atmospheric carbon dioxide during the late Carboniferous reduced the greenhouse effect, causing surface air temperatures to decrease.

• Giant Insects (Meganeura): The higher concentration of oxygen supported larger body sizes. The wingspan of Meganeura reached $65\,cm$, while a modern dragonfly (Giant Petaltail) is only $19\,cm$.

• kCoal Formation Process:

  1. Peat (Accumulated biomass in swamps).

  2. Brown Coal (Lignite).

  3. Sub-bituminous coal.

  4. Bituminous coal.

  5. Anthracite (Formed through increasing heat and pressure over time).

• Regional Locations: NY locations like Binghamton in the Allegheny Plateau contain evidence of environments where peat forms into brown coal.