Igneous and Metamorphic Rocks: Introduction

The video discusses the massive eruption of Lassen Peak in 1915, which spewed ash and gas high into the sky and affected areas up to 200 miles away. The aftermath left a landscape covered in volcanic ash, boulders, and lava flows. Today, hot springs indicate ongoing volcanic activity, suggesting potential future eruptions. The video also introduces igneous rocks formed by magma and lava, and metamorphic rocks created by heat and pressure.

What significant event occurred at Lassen Peak on May 22nd, 1915?

• A large landslide

• A severe thunderstorm

• A volcanic eruption

• A massive earthquake

How far did the volcanic ash from Lassen Peak travel?

• 300 miles

• 50 miles

• 200 miles

• 100 miles

What evidence of the Lassen Peak eruption is visible in the landscape?

• Deep volcanic ash and large boulders

• Flooded valleys

• Dense forests

• Desert sands

What natural feature indicates ongoing volcanic activity beneath Lassen Peak?

• Frozen lakes

• Hot springs

• Dry riverbeds

• Cold springs

What type of rocks are formed by magma and lava?

• Fossil rocks

• Sedimentary rocks

• Igneous rocks

• Metamorphic rocks