Show:
Fossils
Rock cycle
Earths History
Types of Rock
Quizes
100
In sedimentary igneous and sometimes metamorphic rock also where sedimentary is found alot.
Where can fossils be found?
100
-forms in nature -is a solid -has definite make up has a crystal structure
What is the characteristics of a mineral?
100
About 4.5 billion years ago.
When was earth formed?
100
There are three main types of .rocks
How many types of rocks are there?
100
Shells of marine organisms
Limestone can form when ______ get compacted and cemented together?
200
Remains or traces from plants or animals in beaded in a rock.
What is a fossil?
200
When molten rock cools and hardens.
how do igneous rocks form?
200
About 200,000 years ago.
How long have humans been around?
200
Igneous, metamorphic, and sedimentary.
What are the three type of rocks?
200
Numeric time scale.
A time scale that shows how many years ago different events happened is called a ____ time scale?
300
Fossil that lived a long time and all around the world.
What is an index fossils?
300
Metamorphic rocks were once sedimentary, igneous, or another metamorphic rock. These rocks are physically deformed and chemically changed due to different temperatures and pressures. The elements in the minerals can actually "move" to form new minerals.
How do metamorphic rocks form?
300
Bacteria was found in the 1670s.
When was bacteria found?
300
Type of rock that forms around or in a ocean.
What is limestone?
300
They provide evidence of prehistoric organisms that are now extinct.
Why are index fossils more use full to geologist than other fossils?
400
Because metamorphic and igneous rocks go thru hot and high pressured processes that could melt or crush the fossil.
Why are igneous and metamorphic rocks not good for finding fossils?
400
The process in which rock can change from one to another. this cycle has been going on since earth formed. it is still happening today and it will continue to happen as long as earth exist.
What is the rock cycle?
400
Precambrian was the longest.
What was the longest era in earths history?
400
Because they would melt or be crushed from presure.
Why cant trilobites be in metamorphic or in igneous rocks?
400
The kind of particles it is made of.
The color of a sedimentary rock depends on?
500
Trilobites are a fossil group of extinct marine arthropods that form the class trilobita.
What is a trilobite fossil?
500
Igneous rocks, changes do to heat and or pressure to form metamorphic rock then.
Describe the process that causes rocks to change from one form to another?
500
Paleozoic had the most periods.
What era had the most periods?
500
Mix 6 heaping spoon fulls of sand and 15ml of sodium silicate.
How can you make sandstone [metamorphic rock]?
500
The area was once cover by an ocean that gradually grew deeper and then receded.
Rock layers found in the Grand Canyon provide evidence that?