They are known as Igneous, Sedimentary, and Metamorphic.
What are the three major types of rocks?
100
The remains of a living organism preserved in the earth/rock.
What is a fossil?
100
During this event, 95% of life was destroyed.
What is the Great Extinction?
100
This big event happened 4.5 billion years ago.
When did the earth form?
100
This is a series of processes that cause rocks to change from one type to another. This cycle has been going on since Earth formed, and it will continue as long as Earth exists.
What is the rock cycle?
200
These types of rocks aren't good for making fossil because of the heat and/or pressure used to create the rock.
Why aren't Metamorphic and Igneous rocks good for finding fossils?
200
This type of rock is likely to contain fossils.
Will a Sedimentary rock contain fossils?
200
This is the generally accepted age of the earth.
What is 4.5 billion years ago?
200
This pre-historic organism gave Earth it's oxygen.
What is a stromatolite?
200
This ingredient in rocks will make it fizz or bubble when acid is dropped on it's surface.
What is Calcium carbonate/calcite?
300
This type of rock is good for fossils because it forms by layers of minerals getting compacted and cemented together.
Why are Sedimentary rocks good for finding fossils?
300
This rock is formed by heat so it can't contain fossils.
Why can't an Igneous rock contain fossils?
300
This is how long ago the Earth's continents split up into todays positions.
What is 180 million years ago?
300
Stromatolites gave Earth it's oxygen.
What gave Earth it's oxygen?
300
A sedimentary rock forms when layers of rock get held together by matrix, and combined with c02.
How do sedimentary rocks form?
400
This type of rock never completely melt because then it would be a Igneous rock.
Why don't metamorphic rocks never completely melts?
400
They are fossils of organisms that lived for only a short period of time and in many places around the world.
What are index fossils?
400
These people proved the scientist Vagner correct.
Did the Navy prove Vagner correct?
400
Pangea formed this many years ago.
What is 240 million years ago?
400
Small particles that settle when whatever is carrying them slows down.
What are sediments?
500
Igneous rocks will have this size crystal if it forms under the earth's surface.
Why do Igneous rocks have large crystals?
500
This type of dating is used to determine a minerals age.
What is radiometric dating?
500
This scientist used radioactive particles to calculate the age of the earth.
Who was Holmes?
500
This many years ago, the Pre-Cambrian began.
What is 525 million years ago?
500
These are processes that wear away or wear down parts of a rock, and breaks down landforms?