← Virginia Earth and Environmental Science
Virginia · VDOESyllabus
Earth and Environmental Science syllabus, dot point by dot point
Every dot point in the Virginia Earth and Environmental Sciencesyllabus, with a focused answer for each one. Click any dot point for a worked explainer, past exam questions, and links to related dot points. Written by Claude Opus 4.8, Anthropic's latest AI.
Reporting Category: Oceanography, the Atmosphere, Meteorology and Astronomy
Module overview →- Why does Earth have seasons, and how do the tilt and revolution control the angle of sunlight?Explain that Earth's seasons are caused by the tilt of its axis (about 23.5 degrees) as it revolves around the Sun, which changes the directness of sunlight and the length of daylight (Virginia 2018 Earth Science SOL ES.11).12 min answer →
- How do stars produce energy, and how does the H-R diagram organize them?Explain that stars produce energy by nuclear fusion, describe the Hertzsprung-Russell diagram and the relationship between a star's color, temperature and luminosity, and outline the life cycle of a star (Virginia 2018 Earth Science SOL ES.12).12 min answer →
- How do the motions of the Earth, Moon and Sun cause day and night, Moon phases and eclipses?Explain how Earth's rotation causes day and night, how the Moon's orbit causes its phases, and how the alignment of the Sun, Earth and Moon causes solar and lunar eclipses (Virginia 2018 Earth Science SOL ES.11).13 min answer →
- What is in the solar system, and what keeps the planets in orbit?Describe the structure of the solar system (the Sun, terrestrial and gas-giant planets, and small bodies), explain that orbits are elliptical (Kepler), and explain how gravity and inertia keep planets in orbit (Virginia 2018 Earth Science SOL ES.2 and ES.11).13 min answer →
- How big is the universe, and what is the evidence that it began with the Big Bang?Describe galaxies and the scale of the universe, explain the Big Bang theory and its evidence (redshift and the cosmic microwave background), and outline how the electromagnetic spectrum and telescopes are used to study space (Virginia 2018 Earth Science SOL ES.12).13 min answer →
Reporting Category: Earth's History and Surface Processes
Module overview →- How do fossils form, and how do they help correlate rocks and divide geologic time?Explain how fossils form and how index fossils correlate rock layers, and describe the divisions and major events of the geologic time scale, including in Virginia (Virginia 2018 Earth Science SOL ES.9).13 min answer →
- How does radioactive decay let geologists put an actual number of years on a rock?Explain radioactive decay and half-life, and calculate the age of a sample or the fraction of parent remaining using the number of half-lives that have passed (Virginia 2018 Earth Science SOL ES.9).13 min answer →
- How do you read elevation, slope and stream direction from a topographic map's contour lines?Read a topographic map: interpret contour lines and the contour interval, find elevation and relief, judge slope steepness from contour spacing, and use the rule of Vs to find stream direction (Virginia 2018 Earth Science SOL ES.1 and ES.6).13 min answer →
- How do geologists put rock layers in order and read the history recorded in a cross section?Apply the principles of relative dating (superposition, original horizontality, cross-cutting relationships, inclusions and unconformities) to sequence events in a geologic cross section (Virginia 2018 Earth Science SOL ES.9).13 min answer →
- What is soil made of, how do its horizons form, and why does soil matter as a resource?Describe the components of soil and the soil horizons, explain the factors that control soil formation, and evaluate soil as a resource that can be conserved or lost to erosion (Virginia 2018 Earth Science SOL ES.6 surface processes).12 min answer →
- How do weathering, erosion and deposition break down, move and lay down Earth's materials?Distinguish mechanical and chemical weathering, identify the agents of erosion and deposition, and explain how particle size, sorting and water velocity control where sediment is deposited (Virginia 2018 Earth Science SOL ES.6 surface processes).13 min answer →
Reporting Category: Earth's Materials, Resources and Plate Tectonics
Module overview →- How do earthquakes and volcanoes form, and how do we locate and measure them?Explain how earthquakes and volcanoes form at plate boundaries, locate an earthquake epicenter using P-wave and S-wave arrival times, and relate volcano type to magma composition (Virginia 2018 Earth Science SOL ES.7).13 min answer →
- What are Earth's layers, and how do seismic waves reveal them?Describe the compositional and physical layers of Earth's interior (crust, mantle, outer core, inner core; lithosphere and asthenosphere) and explain how seismic waves provide the evidence (Virginia 2018 Earth Science SOL ES.7).12 min answer →
- Which of Earth's resources are renewable, and what are the trade-offs of how we use them?Distinguish renewable and non-renewable resources, describe the major energy sources and Virginia's mineral and energy resources, and evaluate the environmental impacts and conservation of resource use (Virginia 2018 Earth Science SOL ES.3 and ES.4).13 min answer →
- What makes something a mineral, and how do you identify one from its properties?Define a mineral and identify common rock-forming and ore minerals from their physical properties, including hardness, luster, streak, cleavage, color and density (Virginia 2018 Earth Science SOL ES.4).13 min answer →
- What drives the plates, and what happens at each type of plate boundary?Explain plate tectonic theory: the evidence for moving plates, mantle convection as the driving force, the features and motions at divergent, convergent and transform boundaries, and Virginia's geologic provinces (Virginia 2018 Earth Science SOL ES.7).14 min answer →
- How do the three rock types form, and how does the rock cycle turn one into another?Classify igneous, sedimentary and metamorphic rocks by how they form and explain the rock cycle, including how cooling rate, lithification, and heat and pressure transform rock (Virginia 2018 Earth Science SOL ES.5).13 min answer →
Reporting Category: Oceanography, the Atmosphere, Meteorology and Astronomy
Module overview →- What drives surface and deep ocean currents, and how do they affect climate?Explain surface currents (driven by wind and deflected by the Coriolis effect into gyres), deep density-driven circulation, and upwelling, and describe how currents transfer heat and affect climate (Virginia 2018 Earth Science SOL ES.10).12 min answer →
- What is an estuary, and why is the Chesapeake Bay important to Virginia?Describe estuaries and the Chesapeake Bay, including brackish water and its role as a nursery, and explain how watershed land use, runoff and sea-level rise affect coastal Virginia (Virginia 2018 Earth Science SOL ES.10 and human impact).12 min answer →
- What does the ocean floor look like, and what controls the temperature, salinity and density of seawater?Describe the features of the ocean floor (continental shelf, slope, abyssal plain, mid-ocean ridge, trench) and explain how temperature and salinity control seawater density (Virginia 2018 Earth Science SOL ES.10).12 min answer →
- How does water move through the water cycle, and what is a watershed?Explain the processes of the water cycle (evaporation, transpiration, condensation, precipitation, runoff, infiltration) and describe watersheds, groundwater and the water table (Virginia 2018 Earth Science SOL ES.9 and ES.10).12 min answer →
- What makes ocean waves, and why does the sea rise and fall as tides?Describe how wind generates ocean waves and the parts of a wave, and explain that tides are caused by the gravitational pull of the Moon and Sun, including spring and neap tides (Virginia 2018 Earth Science SOL ES.10 and ES.11).12 min answer →
Reporting Category: Scientific Investigation and the Nature of Science
Module overview →- How do you organize Earth science data into a table or graph and read a trend from it?Organize, analyze and interpret data using tables and graphs (line, bar, scatter), identify trends and the relationship between variables, and calculate the rate of change and percent (Virginia 2018 Earth Science SOL ES.1).13 min answer →
- How do you design a fair test, and how do you tell the variable you change from the one you measure?Plan and carry out investigations: identify the independent, dependent and controlled variables, use a control, and explain why repeated trials and a large sample make results more reliable (Virginia 2018 Earth Science SOL ES.1).12 min answer →
- Which instrument and which SI unit do you use to measure each Earth science quantity?Use appropriate tools and SI units to make and record measurements in Earth science, including length, mass, volume, temperature, time, air pressure, wind speed and rainfall (Virginia 2018 Earth Science SOL ES.1).12 min answer →
- What is the difference between a hypothesis, a theory and a law, and how do scientists use models and evidence?Construct, use and evaluate models, distinguish a fact, hypothesis, theory and law, and explain how scientific knowledge is built from evidence and changes over time (Virginia 2018 Earth Science SOL ES.1).12 min answer →
Reporting Category: Oceanography, the Atmosphere, Meteorology and Astronomy
Module overview →- What are air masses and fronts, and how do they produce storms?Describe air masses and the weather at cold, warm, stationary and occluded fronts, and explain how thunderstorms, hurricanes and tornadoes form (Virginia 2018 Earth Science SOL ES.9).13 min answer →
- What is air pressure, and how do pressure differences and Earth's rotation create wind?Explain how temperature affects air pressure and density, how wind blows from high to low pressure, the Coriolis effect, and local winds such as land and sea breezes (Virginia 2018 Earth Science SOL ES.8).12 min answer →
- What controls a region's climate, and what is the evidence for climate change?Distinguish weather from climate, explain the factors that control climate (latitude, elevation, water, ocean currents, prevailing winds), and describe the evidence for climate change and the enhanced greenhouse effect (Virginia 2018 Earth Science SOL ES.9).13 min answer →
- What is humidity and dew point, and how do clouds and precipitation form?Explain humidity, relative humidity and dew point, describe how clouds form when air cools to saturation, and identify the main cloud types and forms of precipitation (Virginia 2018 Earth Science SOL ES.8 and ES.9).12 min answer →
- How do you read a weather map, its isobars, front symbols and a station model?Interpret weather maps, including isobars, front symbols, and the station model (temperature, dewpoint, pressure, wind, sky cover), and use them to forecast (Virginia 2018 Earth Science SOL ES.1 and ES.9).12 min answer →
- What is the atmosphere made of, how is it layered, and how does energy move through it?Describe the composition and layers of the atmosphere and explain how energy is transferred by radiation, conduction and convection, including the greenhouse effect (Virginia 2018 Earth Science SOL ES.8).13 min answer →