Earth and Space Science Review Notes

Space Systems

Sun's Life Span and Nuclear Fusion (HS-ESS1-1)

The Sun's life span is determined by its mass and the rate of nuclear fusion.
Nuclear fusion: The process where hydrogen atoms combine to form helium in the Sun's core, releasing energy.
Energy travels through the Sun's layers via radiation and convection.
Observations of other stars help estimate the Sun's life span by comparing their properties.
The Sun's radiation varies due to solar cycles and activity like sunspots and flares.
The main source of energy for life on Earth is solar radiation.
Radiation: The process by which energy is emitted as particles or waves.
Hydrogen atoms combine to form helium in the Sun's core, releasing energy and producing heavier elements.
The balance between gravity and nuclear fusion determines the Sun's stability and life span.
Examples of variations in the Sun's radiation include solar flares and sunspots.

Big Bang Theory (HS-ESS1-2)

Big Bang Theory: The prevailing cosmological model for the universe. It states that the universe was once in an extremely hot, dense state that expanded rapidly.
Singularity: A point in space-time where gravitational forces cause matter to be infinitely dense and infinitely small.
Red-shift: The phenomenon where light from galaxies is stretched, indicating they are moving away from us. This supports the expansion of the universe.
Cosmic Microwave Background (CMB) Radiation: Thermal radiation left over from the Big Bang, providing evidence of the early universe.
The composition of matter in the universe, primarily hydrogen and helium, aligns with Big Bang predictions.
The red-shift of light from galaxies indicates the universe is expanding, supporting the Big Bang.

Nucleosynthesis (HS-ESS1-3)

Nucleosynthesis: The process by which new atomic nuclei are formed from pre-existing nucleons (protons and neutrons).
Stars produce elements through nuclear fusion in their cores.
A star's mass determines which elements it can synthesize.
Smaller stars can create elements up to iron (Fe) through fusion in their cores.
Stars that are more massive can create elements up to nickel (Ni) through fusion in their cores.
Elements heavier than nickel are created in supernova explosions.

Gravitational Motion in the Solar System (HS-ESS1-4)

The fundamental law governing the motion of objects in the solar system is the Law of Universal Gravitation.
The gravitational force between two objects is directly proportional to the product of their masses. $F = G * (m1 * m2) / r^2$ ([where G is the gravitational constant, m1 and m2 are the masses, and r is the distance between the objects]).
The gravitational force between two objects is inversely proportional to the square of the distance between them.
The motion of an object in orbit is determined by the gravitational force between it and the central body (e.g., a planet and its star).
As two objects move closer, the gravitational force between them increases.
Scientists use mathematical models based on Newton's Law of Universal Gravitation to predict the motion of objects in the solar system.
Predictions made using these models are generally very accurate but can be affected by various factors.
Understanding the motion of objects in the solar system is important for space exploration, satellite deployment, and predicting astronomical events.

Moon's Effect on Earth and Tides (HS-ESS1-7)

The Moon moderates the Earth's wobble on its axis, stabilizing the climate.
Tides on Earth change cyclically due to the Moon's gravitational pull.
The different phases of the Moon are caused by the changing angles at which we view the Moon's illuminated surface.
There are eight distinct phases of the Moon: new moon, waxing crescent, first quarter, waxing gibbous, full moon, waning gibbous, third quarter, waning crescent.
The two types of eclipses are solar and lunar eclipses.
Tides on Earth are caused by the gravitational pull of the Moon and the Sun.
Tides change cyclically due to the Moon's orbit around the Earth.
The changing seasons on Earth are caused by the Earth's tilt on its axis and its orbit around the Sun.
The Earth's tilt on its axis is approximately $23.5$ degrees.
A solar eclipse occurs when the Moon passes between the Sun and Earth, blocking the Sun's light.
A lunar eclipse occurs when the Earth passes between the Sun and Moon, casting a shadow on the Moon.
Eclipses occur cyclically due to the predictable movements of the Earth, Moon, and Sun.

History of the Earth

Plate Tectonics (HS-ESS1-5)

Plate tectonics The theory that Earth's outer shell is divided into several plates that glide over the mantle, the rocky inner layer above the core.
Geological processes resulting from plate tectonics include earthquakes, volcanic eruptions, and mountain formation.
The ages of crustal rocks, with younger rocks near mid-ocean ridges and older rocks farther away, support plate tectonics.
The ages of oceanic crust increase with increasing distance from mid-ocean ridges.
Studying the ages of crustal rocks helps understand the history of plate movements and Earth's geological evolution.
Plate tectonics explain mountain formation through the collision of tectonic plates.
Plate spreading: The process where tectonic plates move away from each other, typically at mid-ocean ridges.
A mid-ocean ridge is an underwater mountain range formed by plate spreading at a divergent plate boundary.
Oceanic crust is thinner, denser, and composed of basalt, while continental crust is thicker, less dense, and composed of granite.

Earth's Formation and Early History (HS-ESS1-6)

Earth formed approximately $4.54$ billion years ago.
Scientists use radiometric dating of rocks, meteorites, and lunar samples to construct an account of Earth's formation.
Scientists use radiometric dating to determine the absolute ages of ancient materials.
The sizes and compositions of solar system objects provide clues about the conditions and processes during the solar system's formation.
Studying meteorites provides insights into the composition and age of the early solar system.
The age of oceanic crust increases with distance from mid-ocean ridges due to seafloor spreading.
Radiometric dating: A method of determining the age of a sample based on the decay of radioactive isotopes.
Plate tectonics: The theory that Earth's lithosphere is divided into plates that move and interact, causing geological events.
Density differences cause Earth and other objects to separate into layers during formation.

Constructive and Destructive Processes (HS-ESS2-1)

Constructive processes: Geological processes that build up landforms (e.g., volcanism, tectonic uplift).
Destructive processes: Geological processes that break down landforms (e.g., erosion, weathering).
Examples of land features created by constructive processes include volcanoes, mountains, and plateaus.
Seafloor features created by constructive processes include mid-ocean ridges and seamounts.
Destructive processes shape the Earth's surface through erosion, weathering, and mass wasting.
The interplay between constructive and destructive processes continuously reshapes the Earth's surface.
Volcanism and tectonic uplift create land features by adding new material and elevating the land.
Subduction creates destructive processes by causing earthquakes, volcanic eruptions, and the formation of trenches.
Deposition: The process of sediments accumulating to form new land features.
Coastal erosion shapes the Earth's surface by wearing away coastlines through wave action and weathering.

Earth's Systems

Earth's Systems Interactions (HS-ESS2-2)

Analyzing geoscience data is important for understanding the interactions between Earth's systems.
Feedback mechanisms: Processes in which the output of a system influences its own operation. They are essential for regulating Earth's climate.
Examples of climate feedbacks include ice-albedo feedback and water vapor feedback.
Loss of ground vegetation can lead to erosion, changes in the water cycle, and decreased carbon sequestration.
Human activities significantly impact Earth's systems, leading to climate change, pollution, and habitat destruction.
Examples of human activities that cause changes in Earth's systems include deforestation, burning fossil fuels, and industrial processes.
Humans can mitigate the impact of their activities by adopting sustainable practices and reducing greenhouse gas emissions.
Understanding feedback mechanisms is essential for predicting and addressing the impacts of human activities on Earth's systems.
After Pangea broke up 130 Ma, over time the number of subduction zones on Earth changed. This change to the geosphere created a feedback that caused changes to Earth’s hydrosphere. Change to the geosphere caused changes to Earth's hydrosphere, which then caused a change in the global sea level.

Earth's Interior and Plate Tectonics (HS-ESS2-3)

The layers of Earth's interior are the crust, mantle, outer core, and inner core.
Thermal convection: The process by which heat is transferred through a fluid (like the mantle) due to density differences.
Plate tectonics: The theory that Earth's lithosphere is divided into plates that move and interact, causing geological events.
Rocks and minerals are identified and classified based on their physical and chemical properties.
Seismic waves: Waves that travel through Earth's interior, providing evidence for its structure. Analysis of seismic wave behavior helps develop models of Earth's interior.
Thermal convection in the mantle drives plate tectonics by causing the movement of lithospheric plates.
The three types of tectonic plate boundaries are convergent (plates collide), divergent (plates separate), and transform (plates slide past each other).
The non-metallic mineral harder than glass with perfect cleavage in two directions is likely feldspar.
The three main groups of rocks are igneous, sedimentary, and metamorphic.

Hydrologic Cycle and Weathering (HS-ESS2-5)

Hydrologic (water) cycle: The continuous movement of water on, above, and below the surface of the Earth.
Water can cause mechanical weathering through processes like freeze-thaw cycles and abrasion.
The hydrologic cycle is connected to the rock cycle through erosion, weathering, and the transport of sediments.
Examples of chemical interactions with water and solid materials include dissolution, oxidation, and hydrolysis.
Infiltration: The process by which water seeps into the ground.
Water causes erosion by transporting soil and rock particles through rivers, glaciers, and wind.
Water plays a role in the creation of new rocks through sedimentation and lithification.
Understanding the interactions between water and Earth materials is important for preparing for natural disasters like floods and landslides.
The permeability of the Earth's surface impacts flooding during rainfall events; low permeability can increase runoff and flooding.

Carbon Cycle (HS-ESS2-6)

Carbon cycle: The biogeochemical cycle by which carbon is exchanged among the biosphere, pedosphere, geosphere, hydrosphere, and atmosphere of the Earth.
The different carbon reservoirs include the atmosphere, oceans, land (including soil and vegetation), and fossil fuels.
Photosynthesis is the main way carbon is removed from the atmosphere.
Greenhouse effect: The process by which certain gases in the atmosphere trap heat and warm the Earth.
Humans are affecting the carbon cycle by burning fossil fuels, deforestation, and industrial processes, leading to increased atmospheric carbon dioxide.
Ocean acidification: The ongoing decrease in the pH of the Earth's oceans, caused by the uptake of carbon dioxide from the atmosphere.
The carbon cycle is important for regulating Earth's climate and supporting life.
The carbon cycle affects the climate by influencing the greenhouse effect and global temperatures.
We can reduce our impact on the carbon cycle by reducing greenhouse gas emissions, conserving energy, and promoting sustainable land use practices.

Coevolution of Earth's Systems and Life (HS-ESS2-7)

Coevolution: The reciprocal evolutionary influence between two or more interacting species or, in this context, between Earth's systems and life.
Earth's systems influence the evolution of life by providing resources, habitats, and environmental conditions that shape the adaptation of organisms.
The evolution of life alters Earth's surface through processes like photosynthesis, weathering, and the formation of soils.
Examples of interactions between Earth's systems and life include the oxygenation of the atmosphere by photosynthetic organisms and the formation of soil by land plants.
We can study the coevolution of Earth's systems and life by examining the geological and fossil records.
The production of oxygen by photosynthetic life altered the atmosphere, leading to the evolution of aerobic organisms.
The evolution of land plants contributed to the formation of soil by breaking down rocks and adding organic matter.
The first grasses were observed in the Cenozoic Period.
An extinction event occurred with life on Earth $66$ million years ago, marking the end of the Cretaceous Period.

Weather & Climate

Climate Change (HS-ESS2-4)

Climate change: Long-term changes in temperature and typical weather patterns.
Variations in the flow of energy into and out of Earth's systems affect climate by altering the planet's energy balance.
Short-term causes of climate change include volcanic eruptions and changes in solar activity.
Long-term causes of climate change include changes in Earth's orbit, plate tectonics, and variations in atmospheric composition.
Models can be used to understand climate change by simulating the interactions between different components of the Earth system.
Understanding the factors that contribute to climate change is important for predicting and mitigating its impacts.
Human activities contribute to climate change by increasing greenhouse gas emissions.
Potential impacts of climate change include rising sea levels, more frequent and intense heatwaves, and changes in precipitation patterns.
Potential impacts of climate change include rising sea levels, more frequent and intense heatwaves, and changes in precipitation patterns.

Forecasting Future Climate Change Impacts (HS-ESS3-5)

Analyzing geoscience data is important in forecasting future climate change impacts because it provides evidence of past climate trends and helps validate climate models.
Global climate models: Computer simulations that use mathematical equations to represent the interactions of the atmosphere, oceans, land surface, and ice.
Examples of climate change impacts include sea level rise, changes in precipitation patterns, and ocean acidification.
Evidence-based forecasting is important because it provides reliable predictions based on scientific data and analysis.
Geoscience data can be used to analyze climate change by tracking changes in temperature, sea level, ice cover, and other climate indicators.
Climate change can cause sea level rise due to thermal expansion of water and melting of glaciers and ice sheets.
Climate change can impact the atmosphere and ocean by altering temperature patterns, ocean currents, and atmospheric circulation.
It is important to consider regional impacts of climate change because the effects can vary significantly from one region to another.
The impacts of climate change can be mitigated by reducing greenhouse gas emissions, developing renewable energy sources, and implementing adaptation measures.

Air Masses and Weather Prediction (HS-ESS2-8)

The main factor that drives the movement of air masses is pressure gradients.
Global winds affect the movement of air masses by steering them across the Earth's surface.
When different air masses interact at frontal boundaries, they can produce various weather phenomena, such as precipitation, storms, and temperature changes.
Analyzing data from various sources is necessary to evaluate weather conditions because it provides a comprehensive picture of the atmosphere.
Examples of data sources used to evaluate weather conditions include weather stations, satellites, and radar.
A forecast model is a computer simulation used to predict future weather conditions.
Predicting weather conditions is important for public safety, agriculture, transportation, and other sectors.
Understanding the movement of air masses helps predict weather conditions by indicating where different types of weather are likely to occur.
Examples of weather phenomena that can occur as a result of air mass interactions include thunderstorms, blizzards, and heatwaves.

Human Sustainability

Influence of Natural Resources on Human Development (HS-ESS3-1)

Key natural resources that have influenced human development include fresh water, fertile soils, and mineral resources.
Examples of natural hazards include earthquakes, volcanic eruptions, and floods.
Changes in climate have affected human activity by altering agricultural productivity, water availability, and the frequency of extreme weather events.
Access to fresh water is critical for drinking, agriculture, and industry.
Natural hazards can affect human populations by causing injury, death, displacement, and economic losses.
The presence of fertile soils is important for agriculture and food production.
Examples of severe weather events include hurricanes, tornadoes, and droughts.
Changes in sea level affect human populations by causing coastal flooding, erosion, and saltwater intrusion.
Humans can prepare for and mitigate the impacts of natural hazards by implementing building codes, early warning systems, and land-use planning.

Resource Development and Conservation (HS-ESS3-2)

Examples of energy and mineral resources include fossil fuels, minerals, and renewable energy sources.
Cost-benefit ratios are used to evaluate the economic and environmental costs and benefits of different resource development projects.
Conservation is important for resource development because it helps ensure that resources are used sustainably and efficiently.
Recycling: The process of collecting and processing waste materials and converting them into new products. It is important because it conserves resources and reduces pollution.
Reusing products helps conserve resources by extending the lifespan of materials and reducing the need for new production.
Mining can impact the environment by causing habitat destruction, soil erosion, and water pollution.
Best practices for pumping petroleum and natural gas include minimizing leaks, reducing greenhouse gas emissions, and preventing spills.
Science knowledge is important when evaluating design solutions for resource management because it helps ensure that solutions are effective, sustainable, and environmentally sound.

Natural Resource Management, Sustainability, and Biodiversity (HS-ESS3-3)

Management of natural resources involves the sustainable use and conservation of resources to meet the needs of present and future generations.
Factors affecting the management of natural resources include economic considerations, social values, and environmental impacts.
Sustainability of human populations: The ability of human populations to live within the carrying capacity of the environment without compromising the ability of future generations to meet their own needs.
Biodiversity: The variety of life in the world or in a particular habitat or ecosystem.
Biodiversity is important because it provides essential ecosystem services, such as pollination, water purification, and climate regulation.
Computational simulation: The use of computer models to simulate complex systems and processes.
A computational simulation can illustrate the relationships among natural resource management, human sustainability, and biodiversity by modeling the impacts of different management strategies on these factors.
Developing new technologies for natural resource management is important because it can lead to more efficient and sustainable resource use.

Reducing Human Impacts on Natural Systems (HS-ESS3-4)

Negative impacts that human activities can have on natural systems include habitat destruction, pollution, and climate change.
Technological solutions can help to reduce the impacts of human activities on natural systems by providing cleaner energy sources, reducing pollution, and improving resource efficiency.
It is important to evaluate and refine technological solutions because they may have unintended consequences or may not be effective in all situations.
Data that can be used to evaluate the impacts of human activities on natural systems include air and water quality data, species population data, and climate data.
Examples of local efforts to limit future impacts of human activities on natural systems include promoting sustainable agriculture, reducing waste, and conserving water.
It is important to limit the impacts of human activities on natural systems because these impacts can threaten human health, damage ecosystems, and reduce the availability of resources.
Technology plays a role in reducing the impacts of human activities on natural systems by providing tools, and creating more alternatives to reduce negative impacts.
Individuals can contribute to reducing the impacts of human activities on natural systems by conserving energy, reducing waste, and making sustainable choices.

Earth Systems and Human Activities (HS-ESS3-6)

Using computational representations in studying Earth systems helps scientists understand complex interactions and predict future changes.
Examples of Earth systems that can be considered include the atmosphere, hydrosphere, cryosphere, geosphere, and biosphere.
These Earth systems impact each other through the exchange of energy and matter.
Examples of human activities that can impact Earth systems include burning fossil fuels, deforestation, and industrial processes.
Increased atmospheric carbon dioxide leads to ocean acidification, which can harm marine life.
Cryosphere: The frozen water part of the Earth system, including ice sheets, glaciers, and sea ice.
Human activities can impact the cryosphere by contributing to global warming, which causes melting of ice.
Biosphere: The regions of the surface, atmosphere, and hydrosphere of the earth (or analogous parts of other planets) occupied by living organisms.
Human activities can impact the biosphere by causing habitat destruction, pollution, and climate change.