History Of Earth

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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