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Chapter 1 review

QuestionAnswer
What is the law of Superposition Older rock on the bottom Younger rock on the top
What is the relative age of rocks The estimated age of rocks compared to other rocks
What is the absolute age of rocks The precise age of rocks
How can you determine a rocks age Geologists study clues from igneous rocks, faults, and gaps.
What is an intrusion When lava hardens beneath the surface
What is an extrusion When lava hardens on the surface
What is a fault A break in Earth's crust
What is an index fossil A wide spread fossil that didn't live long
How old is Earth 4.6 billion years
What is the Earth made of Rock, ice, and dust
During what period did the atmosphere, ocean, and continents form Precambrian time
What is the atmosphere made up of Carbon Dioxide, Co2, H2o and other gases
How long ago did the continents form about 500 million years after Earth formed
How long ago did scientists find the oldest living organism 3.5 billion years ago
What direct evidence do scientists use Rock samples, and drill samples
What is an epicenter The center of an Earthquake
What is indirect evidence Cannot see it, caused by Earthquakes, speed and path measured
What do Earth's layers differ in Size,comp., temp., and pressure
What is the crust Earth's outermost layer
What makes up the ocean and continental floor Basalt and Granite
What is the mantle Layer of hot rock under crust
Where does the lower mantle stretch down to The solid core
What is radiation The transfer of energy through space with no direct contact
What is conduction Heat transfer through an object
What is convection The transfer of heat through liquids
What is a convection current When cooled liquid sinks back into warm liquid
What is a convection current in Earth Pressure causes it to flow
Created by: nathantolva
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