Vocab 1
Layer of Earth that includes land and the ocean floor.
Crust
Deepest layer of Earth.
Core
Earth's ________ is the hottest layer.
A. crust B. mantle
C. core D. ocean floor
Core
California has more than 20,000 earthquakes each year because there is a large ______ running through the state.
A. epicenter B. river
C. crater D. fault
fault
Instrument that records earthquake waves.
Seismograph
Shaking of Earth's crust.
Earthquake
Scientists can __________ earthquakes by using seismographs, the Mercalli scale, and the Richter scale.
A. measure B. predict
C. weaken D. cause
Measure
Different kinds of ___________ form different kinds of volcanic mountains.
A. eruptions B. cinders
C. slopes D. energy waves
Break in Earth's crust along which rocks move.
Fault
Thickest layer, made of solid and melted rock.
Mantle
Some volcanoes form new _____ as plates move apart and magma rises to the surface of the crust.
A. volcanoes B. ocean floor
C. earthquakes D. mantle
Ocean Floor
What are the three layers of Earth?
Crust
Mantle
Core
Underground point where an earthquake first starts.
Focus
Earth's plates move very slowly across Earth's surface on a thin layer of partly melted ____________.
A. core B. mantle
C. volcanic ash D. crust
They can destroy land and homes. Ash clouds are harmful to humans and animals.
Continent-sized slabs that make up the crust and upper mantle.
Plates
Melted rock inside earth.
Magma
What is a benefit of volcanoes?
mineral rich soil to help plants and crops grow.
What are the three types of volcanoes?
Shield Volcanoes
Cinder Cones
Composite