NSES Content Standard F 
Science in Personal and Social Perspectives: Natural hazards
Grades 5-8, page 168

Internal and external processes of the Earth system cause natural hazards, events that change or destroy human and wildlife habitats, damage property, and harm or kill humans. Natural hazards include earthquakes, landslides, wildfires, volcanic eruptions, floods, storms, and even possible impacts of asteroids.

Benchmark 4B The Physical Setting: The Earth
Grades 6-8, page 69
Climates have sometimes changed abruptly in the past as a result of changes in the earth's crust, such as volcanic eruptions or impacts of huge rocks from space. Even relatively small changes in atmospheric or ocean content can have widespread effects on climate if the change lasts long enough.

Benchmark 4C The Physical Setting: Processes that Shape the Earth
Grades 6-8, page 73
The interior of the earth is hot. Heat flow and movement of material within the earth cause earthquakes and volcanic eruptions and create mountains and ocean basins. Gas and dust from large volcanoes can change the atmosphere.