Science Unit Quiz Flashcards
What causes plate tectonic movement.
Because convection occurs in the earth’s outer core that pushes against the plates making them move.
What different types of evidence are used to support sea floor spreading and continental drift theory.
Continental drift: The continents fit like a puzzle, fossil records, mountain ranges, rock types and glacial deposits
Sea floor spreading: Trenches, disappearing crust, subduction zones, magnetic field and the age of the oceanic crust.
Who created the continental drift theory.
Alfred Wegener
What are the three different plate boundaries.
Convergent, divergent and transform
What is the theory of plate tectonics.
The theory is that the outer rigid layer of earth that is divide into twelve plates that move around across the earth’s surface.
What are folds
It’s a bend in the layers of rock caused by underground movements in the earth
What is continental drift theory.
It is a theory that all the continents used to be formed in one giant landmass.
What is fracture.
It is when a rock or mountain separates into two or more pieces
What is fault
It is a crack in the earth’s crust
What are the two types of fold
Anticline and syncline
What are the three types of faults
Normal, reverse and strike slip
What causes earthquakes
Plate tectonic interaction, faulting, pressure and stress
Where do most earthquakes occur
80% occur around the earth’s pacific plate.
How do we measure earthquakes
Richter Scale and the Mericalli Scale
What are the two main types of waves
There are p-waves and there are s-waves, the s-waves are slower than the p-waves.
