History Of Earth
What changes do rocks go through?
All rocks start as Magma then Crystalize in a Igneous rock and then separate from them
Sedimentary rocks are classified by type and size
Metamorphic rocks are classified by texture
Igneous rocks are classified by location of magma
Sedimentary Rocks - When sediment deposits harden after being compressed and cemented together
Metamorphic Rocks - The rock existing from a change of heat, pressure, and chemical processes.
Igneous Rocks - Forms when magma cools and hardens
The rock I am presenting for is a metamorphic rock which is Slate
Rocks go through a never ending rock cycle
Resources
Why does the surface of the Earth look like it does today?
Seafloor spreading- new oceanic crust is formed through volcanic activity then gradually moves from the ridge
Convection- heat transfer by the movement of a heated fluid
Connection
Rocks crush and fold together forming mountains
The movement of tectonic plates
Presnation
Notes
How do we determine the age of Earth?
Vocab
Relative Dating - Determining the age of an object by comparing its age to another object.
Absolute Dating-determining the age of an object comparing its age to another object
Connections
A sandwich has different layers like the earth first the bread then the meat etc.
Evidence
Radioactive decay scientists compare the proportions of the original new isotopes to determine the absolute age of the rocks
Scientists list the order of rocks the newer layers will be on top of the older ones
Absolute age is an exact number like this rock is 100 years old
Claim
Similar coastlines
Fossil records
Age and typeof rocks
Sources
Notebook
Presentation
