Authoritative verification leads
Resources and Sources
Official and first-party sources used to verify standards, scientific ideas, and California contexts.
01
How sources are chosen
The project favors California and federal agencies, universities, museums, parks, and professional scientific organizations. A citation is a starting point for professional review, not a signal that every statement on a page is endorsed.
- Use direct, authoritative pages when possible.
- Recheck volatile facts, local guidance, and safety information before use.
- Record the organization, URL, access date, and rights status.
Source registry
30 verification sources.
Links open the organization’s source page. Teachers should confirm that a source remains current before classroom use.
American Chemical Society Middle School Chemistry
Accessed 2026-07-29
California Biodiversity InitiativeCalifornia Biodiversity Initiative
Accessed 2026-07-29
California Department of EducationCalifornia Grade Seven Standards — Preferred Integrated Course Model
Accessed 2026-07-29
California Geological SurveyCalifornia Geological Survey
Accessed 2026-07-29
California Natural Resources AgencyCalifornia Natural Resources Agency
Accessed 2026-07-29
California State Parks Natural ResourcesCalifornia State Parks Natural Resources
Accessed 2026-07-29
California Tsunami ProgramCalifornia Tsunami Program
Accessed 2026-07-29
Channel Islands National Park EcosystemsChannel Islands National Park Ecosystems
Accessed 2026-07-29
Mojave National Preserve NatureMojave National Preserve Nature
Accessed 2026-07-29
NASA Earth ObservatoryNASA Earth Observatory: The Carbon Cycle
Accessed 2026-07-29
NASA Earth System ScienceNASA Earth System Science
Accessed 2026-07-29
National Geographic SocietyNational Geographic Society: Cellular Respiration
Accessed 2026-07-29
NIST Chemistry WebBookNIST Chemistry WebBook
Accessed 2026-07-29
NIST Conservation of Mass ResourcesNIST Conservation of Mass Resources
Accessed 2026-07-29
NIST Heat and ThermodynamicsNIST Heat and Thermodynamics
Accessed 2026-07-29
NIST Periodic Table of the ElementsNIST Periodic Table of the Elements
Accessed 2026-07-29
NOAA JetStreamNOAA JetStream: Heat and Temperature
Accessed 2026-07-29
NOAA SciJinksNOAA SciJinks: States of Matter
Accessed 2026-07-29
U.S. EPA Sustainable Materials ManagementU.S. EPA Sustainable Materials Management
Accessed 2026-07-29
U.S. EPA WetlandsU.S. EPA Wetlands
Accessed 2026-07-29
U.S. Geological Survey EcosystemsU.S. Geological Survey Ecosystems
Accessed 2026-07-29
USGS Earthquake Hazards ProgramUSGS Earthquake Hazards Program
Accessed 2026-07-29
USGS Geologic TimeUSGS Geologic Time
Accessed 2026-07-29
USGS Landslide Hazards ProgramUSGS Landslide Hazards Program
Accessed 2026-07-29
USGS Mineral Resources ProgramUSGS Mineral Resources Program
Accessed 2026-07-29
USGS Plate TectonicsUSGS Plate Tectonics
Accessed 2026-07-29
USGS Rocks and MineralsUSGS Rocks and Minerals
Accessed 2026-07-29
USGS This Dynamic EarthUSGS This Dynamic Earth
Accessed 2026-07-29
USGS Water CycleUSGS Water Cycle
Accessed 2026-07-29
USGS Water Science SchoolUSGS Water Science School
Accessed 2026-07-29
Adapt this guidance to district policy, adopted materials, actual learners, available facilities, and current authoritative sources.