Layers of Earth and Plate Tectonics
What is it called when two plates move apart
Divergent
How do Igneous rocks form
Lava cools and solidifies
Weathering that wears away rock but does not change it chemically
Physical Weathering
Fossils of evidence of previously living things
Trace Fossils
The largest division of time
Eon
Which layer of earth do we walk on?
The Crust
Sedimentary rocks are formed by compaction and...
Cementation
Weathering that wears away rock by changing its chemical structure
Chemical Weathering
What do fossils need to form?
sediment, time, and correct conditions
Methods used to put layers of earth in order and make estimates about Earths history
Relative Dating
Which layer of Earth Moves the tectonic plates through convections
The Mantle
Metamorphic Rocks are formed by
Heat and pressure of previous rocks
a piece of land surrounded by water on 3 sides
Peninsula
Fossils that show the full form of a living thing
Body Fossils
Carbon Dating and Uranium/Lead dating that gives an age for rocks
Absolute Dating
Which layer of Earth is Responsible for Earths magnetic field
The Outer Core
Intrusive Rocks are
Formed deep in the ground and have large crystals
Land that has been warn away by a river carrying layers of dirt until a large gorge forms
Canyon
Fossils that show the outline of creatures
Which era did Dinosaurs appear
Mesozoic Era
Which boundary movement causes only Earthquakes and Mountains
Continental Continental Convergent
Sedimentary rocks formed from the precipitation of a solid is called
Chemical
Thermal Expansion
Physical Weathering
studying a cross section of Earth
Crossbedding
The Era in which humans develop
Cenozoic