Science chapter 3

rocks

14 cards·by Naydeem14

How do geologists learn about Earth’s Interior?

by using Direct and Indirect evidence

How do geologists get direct evidence?

drill deep ( 12.3 miles) to get samples *volcanic blasts out from 100+ Km *recreate conditions of earth’s interior to see how rocks behave *

How do geologists get indirect evidence?

• Record and analyze seismic waves ( earthquake waves) • Look at the speed and path they travel -example- similar to waves ocean going arou

What is the crust?

forms outer skin; solid rock that includes dry land and ocean floor

What are the differences between the two crusts?

ocean crust- uniform basalt, dark fine grain

What are the three layers of the mantle?

lithosphere, asthenosphere, and mesosphere

What is the core made of?

iron/ nickel

What are two principles of heat transfer?

always being transferred inside earth and transfer warmer -> cooler objects

What are the three types of heat transfer?

radiation, convection, and conduction

What is radiation?

transfer light /heat through air- warms

What is convection?

current created as warm air rises- cools warm air above; movement of a fluid

What is conduction?

transfer of heat from one material to another; materials are touching

How do geologists classify rocks?

study the mineral composition, color, texture

What are the four ways to classify rocks?

composition, color, texture, origin