Fossils
This is a type of fossil that shows the behavior of an animal- example Foot Prints, burrows, nests
What is a trace fossil
a theory that states " The Earth is shaped by occasional catastrophes such as asteroids hitting the Earth
What is Catastrophism
Collection of all the fossils ever found and recorded - This gives us important clues about the types of organisms that lived throughout Earth History.
What is the Fossil Record
3% of Earth's water is fresh water, however most of this is not accessible to us because it is ....
What is frozen in ice caps and glaciers
This describes how cloudy or clear water is
What is turbidity
Forms when sediment bury an organism and the sediment turns into a rock, The organism decays , leaving a cavity ( hole) in the shape of the organism
What is a mold fossil
This theory states that the Earth processes we see today ( like erosion, plate movement) are similar to the processes that have occurred in the past.
What is Uniformitarianism.
This type of dating does not provide us with the exact age of a fossil or rock - We simply compare the fossil to other rock layers to get an approximate age.
What is Relative Dating
Water from this source is cleaner than any other source because it is filtered by rocks and soil.
What is an aquifer
This is the pH level healthy water should always be.
What is 7 ( neutral)
Forms when the ENTIRE or parts of the organism are prevented from decaying by being trapped in tar or amber
What is a preserved fossil
This is a record of all the major events and the types of living things in Earth's history.
( Like a calendar of all the Eons/Eras, etc of our History)
What is the Geologic Time Scale
This Law states that older rocks are on the bottom and the younger rocks are on top
What is the Law of Superposition
This is a place that connects the lakes and rivers to the ocean. This area is home to many organisms that are born into the brackish water environment until they are strong enough to swim to the ocean.
What are estuaries
This is an overgrowth of algae within a water system
What is an algal bloom
Forms when a mold fossil is filled in and takes the shape of the organism
What is a Cast Fossil
This is the current Era in which we are living in now
Cenozoic Era
This type of fossil is used to give the relative age of a fossil. In order to be this type of fossil, this organism must have lived for only a short period of time on Earth, there must be a lot of them in the rock layer and they must be over a wide area ( and be unique in appearance)
What is an Index Fossil
How salt, sediment and minerals enter our estuaries and oceans.
What is through our rivers and streams ( also precipitation falls on rocks , minerals breaking them down into salts)
This is the cause of algal blooms in our water systems .
What is fertilizer runoff from farms/lawns/etc
also called permineralized fossil, forms when minerals soak into the buried remains , replacing the remains and changing them into rock
What is petrified fossils
This is the first Era of the Geologic Time Scale
What is the Precambrian Era
This type of dating gives the exact age of a rock or fossil
What is absolute dating or radiometric dating
This describes underwater volcanoes located deep within the ocean floor- spewing out methane gases
What are hydrothermal vents
Algal blooms or eutrophication affects the water by removing this vital gas
What is dissolved oxygen