Rocks
What is weathering
the breakdown of rock
How does a sedimentary rock turn into sediment?
weathering, erosion, and deposition
what is the way to estimate the order of geologic events by using rock layers
relative dating
plants or animal remains used to define and identify geologic periods
index fossils
What is erosion
the transport of sediment
weathered metamorphic rocks turn into ______
sediment
process of determining a specific age of an object
absolute dating
how old is Earth
4.6 billion years
How are sedimentary rocks formed?
Compaction and cementation of sediments
igneous rock can be turned into metamorphic rock through what process?
adding heat and pressure
what is the law of superposition
states that younger rocks are on the top and older are on the bottom
what is radioactive decay
the breakdown of an atom into a stable isotope of the same element or into a different one
The layer of the Earth that provides Earth with it's magnetic field.
Outer Core
deforestation and other human impacts lead to _____
increased soil erosion
what is the law of crosscutting relationships
a fault or crack that cuts into a rock must be younger than the rock it cuts into
radiometric dating is used to determine the relative or the absolute age of an object?
absolute
magma that has crystallized forms what type of rock?
igneous rock
what type of rock is in horizontal layers that often contains fossils?
sedimentary rocks
what is folding
the bending of rock
what evidence from fossils supports continental drift
same fossils on different continents & tropical fossils being found on mountains/up North