Planet Earth Units 4-5 Key Terms Flashcards
Four layers of the earth
- Core
- Upper mantle
- Lower mantle
- Crust
Where we are
Crust
Rock material lithosphere
Mantle
Post of iron and nickel liquid
Outer core
Solid ball because of pressure from all layers
Inner core
Pangea super continent
Continental drift
Sonar
Sound navigation and ranging
Mid Atlantic Ridge
Seafloor spreading
Earth is made up of different _______
Plates
Earth is made up of different plate sections. These plates are always moving on the mantle due to convection currents
The theory of plate tectonics
Plates that come together
Converging plates
Plates that pull apart or separate
Diverging plates
Evidence of continental drift
Plants animals and fossils found similarities of rocks coal found in non-tropical climates
Flow resulting from rise of warmer and the sinking of cooler material
Convection current
Two plates collide Wannish and under the other
Subduction zones
Special machine scientist use to measure earthquakes magnitude and are attached to bedrock
Seismograph
Sturdy rock seismographs attached to it
Bed rock
Scale used to describe magnitude of earthquake
Richter scale
Energy waves that travel out word from source of focus
Seismic waves
Primary waves
Fastest, weakest, pass-through all solid liquid and gas and least amount of damage
Secondary waves
Faster than surface but slower than primary, passed through solids, medium amount of damage
Surface waves
Slowest, greatest damage, strongest, pass-through solids
Focus
Where earthquake begins inside earth
Fault
And pressure is too great the rock break suddenly creating a fault
Three types of faults
Normal fault, reverse faults, strike slip or transform fault
Normal faults
Stretch apart and break valleys form
Reverse faults
Rocky squeeze by the movement of the plates forcing them up and over other rocks
Aftershocks
Call earthquake after big one can cause damage buildings to collapse
Epicentre
The earthquake originates on the surface of the earth directly above Focus
Strike-slip or transform faults
The rocks have many bumps and bolts shoes in them they become twisted and strained it and eventually break
