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

American Chemical Society Middle School Chemistry

Accessed 2026-07-29

California Biodiversity Initiative

California Biodiversity Initiative

Accessed 2026-07-29

California Department of Education

California Grade Seven Standards — Preferred Integrated Course Model

Accessed 2026-07-29

California Geological Survey

California Geological Survey

Accessed 2026-07-29

California Natural Resources Agency

California Natural Resources Agency

Accessed 2026-07-29

California State Parks Natural Resources

California State Parks Natural Resources

Accessed 2026-07-29

California Tsunami Program

California Tsunami Program

Accessed 2026-07-29

Channel Islands National Park Ecosystems

Channel Islands National Park Ecosystems

Accessed 2026-07-29

Mojave National Preserve Nature

Mojave National Preserve Nature

Accessed 2026-07-29

NASA Earth Observatory

NASA Earth Observatory: The Carbon Cycle

Accessed 2026-07-29

NASA Earth System Science

NASA Earth System Science

Accessed 2026-07-29

National Geographic Society

National Geographic Society: Cellular Respiration

Accessed 2026-07-29

NIST Chemistry WebBook

NIST Chemistry WebBook

Accessed 2026-07-29

NIST Conservation of Mass Resources

NIST Conservation of Mass Resources

Accessed 2026-07-29

NIST Heat and Thermodynamics

NIST Heat and Thermodynamics

Accessed 2026-07-29

NIST Periodic Table of the Elements

NIST Periodic Table of the Elements

Accessed 2026-07-29

NOAA JetStream

NOAA JetStream: Heat and Temperature

Accessed 2026-07-29

NOAA SciJinks

NOAA SciJinks: States of Matter

Accessed 2026-07-29

U.S. EPA Sustainable Materials Management

U.S. EPA Sustainable Materials Management

Accessed 2026-07-29

U.S. EPA Wetlands

U.S. EPA Wetlands

Accessed 2026-07-29

U.S. Geological Survey Ecosystems

U.S. Geological Survey Ecosystems

Accessed 2026-07-29

USGS Earthquake Hazards Program

USGS Earthquake Hazards Program

Accessed 2026-07-29

USGS Geologic Time

USGS Geologic Time

Accessed 2026-07-29

USGS Landslide Hazards Program

USGS Landslide Hazards Program

Accessed 2026-07-29

USGS Mineral Resources Program

USGS Mineral Resources Program

Accessed 2026-07-29

USGS Plate Tectonics

USGS Plate Tectonics

Accessed 2026-07-29

USGS Rocks and Minerals

USGS Rocks and Minerals

Accessed 2026-07-29

USGS This Dynamic Earth

USGS This Dynamic Earth

Accessed 2026-07-29

USGS Water Cycle

USGS Water Cycle

Accessed 2026-07-29

USGS Water Science School

USGS Water Science School

Accessed 2026-07-29

Professional review remains essential

Adapt this guidance to district policy, adopted materials, actual learners, available facilities, and current authoritative sources.