Earth's Structure
The densest layer of the Earth
What is inner core
What is convection currents
What is running water, wind , glaciers, gravity, tectonic forces, volcanic eruptions
Scientists learn about Earth's history by studying
What is fossils, rocks, and ice cores
Convection currents flowing in the mantle (asthenosphere) are driven by heat from the core. The currents form due to a difference in temperature and density. Explain the process or flow of a convection cell.
What is as temperature increases the density decreases and the hot mantle material rises. As the mantle material cools (temperature decreases) the density will increase and it sinks back to the lower mantle to be reheated.
This word describes how temperature, density and pressure changes going from the crust down to the core.
What is increases
This type of boundary is the movement of plates towards each other resulting in mountain ranges, volcanic arcs, and deep ocean trenches.
What is convergent boundary
The 2 factors that affect the velocity (speed) of water
What is slope and volume
A scale that divides Earth's history into distinct intervals of time
What is geologic time scale
What is primary waves
The separation of different planetary materials into distinct layers by density is known as
3 factors that contribute to Earth's internal heat
What is gravity, radioactive decay of elements/atoms and friction
The part of the river where most erosion occurs
What is the cut bank
a method of rock dating in which the age of an object or event is determined relative to some other object or event.
What is relative dating
What is secondary waves
What is outer core
This type of boundary is a result of two tectonic plates moving away from one another creating mid-ocean ridges (sea-floor spreading) and rift valleys.
What is divergent boundary
The transport (movement) of weathered materials from one place to another by natural forces
What is erosion
A method of rock dating in which the age of a fossil is estimated in years,provides a numerical age by examining the chemical content of the rock (radioactive decay).
What is Absolute dating
What is convection currents
What is inner core
This type of boundary is a result of tectonic plates slip and slide past one another causing earthquakes.
What is transform boundary
Occurs when natural forces lay eroded sediment down in new places.
What is deposition or sedimentation
What is Law of Superposition
Characteristic of seismic waves that change as they move through different layers of Earth
What is speed and or direction