ckla geology chapter 2

What are seismic waves? use your glossary

Where can seismic waves travel? pg 13

• the ocean

• into the crust and into the Earth’s interior

• the core

• the crust

What did scientists learn from studying seismic waves? pg 14

• scientists were able to identify Earth’s four main layers: the inner core, the outer core, the mantle, and the crust.

• scientists were able to identify Earth’s volcanoes

• scientists were able to identify Earth’s four oceans

• scientists were able to identify Earth’s mountains

Name and describe characteristics of each layer, while referring to the image that spans pages 14 and 15.

What type of rocks did scientist dredged up to sample?

The rocks scientist used to sample ..... pg 16

What are ocean trenches? pg 17 use your glossary

find South America on the map and identify the plate that lies directly to the west of most of the continent.pg 18n19

• the Nazca Plate

• the Scotia plate

• The Arabian plate

• the African plate

What is subduction? pg 20 paragrapgh 2