Remains or traces of organisms perserved in earths crust.
What is A Fossil?
100
4.5 billion years ago.
What is When Earth was made?
100
Limestone, Sandstone, and Shale.
What is Sedimentary Rocks?
100
A destructive process in which weather erodes a rock.
What is Weathering?
100
Going on all the time and is creating itself because of construction that builds up the crust, also has destruction that breaks it down.
What is Earth that is constantly recreating its surface?
200
Fossils of organisms that lived for a short period of time in many places.
What is Index fossils?
200
Formed 10 million years ago.
What is When the Grand Canyon formed?
200
A drop of acid will fizz on a sample of limestone.
What is Calcite (Carbon Dioxide)?
200
When moving water or wind picks up loose bits of rock, Destructive Process.
What is Erosion?
200
Used to show Earths history, its shows when humans existed, it starts with the present and moves backwards into the past, usually divided into eras and periods.
What is a Geologic time line?
300
Evidence about Prehistoric Enviroments.
What is Provided to geoligist?
300
Appeared 200 thousand years ago.
What is When humans first appeared?
300
When Particles get compacted together.
What is Sedimentary rocks?
300
Particles of loose earth material, that settle in the ocean bottom, Constructive Process.
What is Sedimentation?
300
Has molten rock in it which cools and hardens and is to hot to hold and imprint. Another type of rock causes heat and pressure which will destroy the imprint of a dead organism.
What is Igneous and Metamorphic rock that doesn't hold fossils?
400
Fossils of sea shells have been found in the Grand Canyon at an elevation of 8,000 feet above sea level, when the area was covered by a ocean what formed.
What is fossils that were uplifted?
400
1.7 billion years ago.
What is Events that show rock from the Grand Canyon?
400
Process that causes rocks to change from one type to another.
What is the Rock cycle?
400
When water or wind slows down and the rock bits settle, Constructive Process.
What is Deposition?
400
Find a relationship between two or more locations, and to show age of rock layers.
What is Correlation?
500
Limestone = Ancient sea, Coal = Swamps.
What is Fossil clues to Prehistoric Enivroments?
500
This igneous rock formed above a layer of sandstone about 200 million years ago.
What is Granite?
500
A rock layer made up of many different kinds of rock.
What is Formation?
500
Things that happen to earth that build it up, or make positive changes.
What is Constructive Processes?
500
Landforms shaped like steps or cliffs, happens when a mountain is made of soft and hard rock, the soft rock wears away leaving knobs of cliffs or hard rock.