Earth's Layers
What is the exact center of the Earth?
The Core
How is igneous rock made?
melting and cooling
What is the breaking down of rock?
Weathering
Determining whether an object or event is older than other objects or events
Relative Dating
Cold fluids are more dense so what do they do?
sink
How does heat travel from the inner core to the crust?
Convection
How is metamorphic rock made?
heat and pressure
What is the movement of sediment from broken rock?
Erosion
Determining the actual age of an event or object in years
Absolute dating
Why do hot fluids rise?
They are less dense
Why is Earth's inner core solid?
The extreme pressure
How is Sedimentary Rock made?
Weathering and Erosion
What is the dropping of sediment in a new place?
Deposition
What does the law of superposition state?
younger rocks sit on top and older rocks are at the bottom
How are fossils similar to photographs?
They both tell us about past life.
Describe the Earth's crust.
The outermost layer of earth.
It is thinnest layer.
What is the series of processes that changes rocks?
The Rock cycle
Give 2 examples of weathering agents
Water
Ice
Wind
Animals or Growing plants
What has the study of fossils allowed scientists to do?
Describe past environments and life
Paleontologists discovered fish fossils in the arid deserts of western Egypt. What does the fossil evidence most likely indicate about this area’s geologic past?
It was once a vast ocean.
What does the effect of the movement of the liquid in Earth's Outer Core create?
It creates the Earth's magnetic field.
A stream carves a channel through soil rock by removing a few small particles of rock at a time. The stream water slows down when it enters a pond, allowing the rock particles to settle at the bottom of the pond. Pressure combines these particles into a solid rock. What is the new rock?
Sedimentary Rock
What is an example of deposition?
Formation of islands
Sand Dunes
If rock layer A is above rock layer B and rock layer B is above rock layer C what does that tell us about the relative age of rock layer B?
It is older than A, but younger than C
Define convection
A process by which heat is transferred by movement of a heated fluid.