sience
The San Andreas fault is an example of which kind of boundary? a transform b divergent C oceanic d converge
A
Which feature forms at convergent boundaries? a mountain range b trench C rift valley d mid-ocean ridge
A
fault in which the rocks on either side of the fault move sideways past each other is a A slip-strike fault B normal fault C hanging fault D reverse fault
A
The stress force that squeezes rock until it folds or breaks is A shearing B compression C tension D uplifting
B
The stress force that pulls on the crust and thins rock in the middle is A shearing B compression C tension D uplifting
C
What is the motion of Earth's plates like? A fast and in stages B slow and in stages C fast and constant D slow and constant
D
Which theory describes the motion of and force driving Earth's plates? A first law of motion B third law of motion C continental drift D plate tectonics
D
true or false......Plates slide past each other at convergent boundaries.
F
true or false....Most geologists of Wegener's time accepted his idea of drifting continentals.
F
true or false....Most transform boundaries where plates move apart occur along the mid-ocean ridges.
F
true or false....Ocean currents drive Earth's plates.
F
describe the movement magnitude scale, and explain why its useful for measuring earthquakes
It measures the total energy that it released by the earthquake
The seismic waves that move fastest are .
P waves
what type of seismic wave produce the most sever movements
P waves
in what order to three types of seismic waves arrive at a seismograph
P waves s wave surface wave
true or false......Breaks in the crust called faults form where plates meet.
T
true or false......Earth's plates meet at boundaries.
T
true or false....A(n) rift valley forms where plates diverge on land.
T
true or false....Pangaea is the supercontinent that Wegener suggested occurred on Earth about 300 million years ago.
T
true or false....Wegener inferred that the ancient plants Mesosaurus and Lystrosaurus once lived on a single landmass that since split apart.
T
A(n) is any trace of an ancient organism preserved in rock.
fosils
Wegener noticed that mountain ranges on the continents of South America and _______ line up.
north America
All the continents were joined together in a supercontinent that Wegener called _____________.
pangea
The geological theory that states that pieces of Earth's crust are in constant slow motion is called ..........
plate tectonics
The lithosphere is broken into separate sections called .
plates
A(n) is a deep valley on land that forms along a divergent boundary.
rift valley
when two plates carrying continental crust collide.......
the collision squeezes the crust into mountain range
When a plate carrying oceanic crust collides with a plate carrying continental crust........
the denser ocean plate goes bellow the continental plate
When two plates carrying oceanic crust collide.......
the thicker plate goes bellow the thinner plate and a deep ocean trench
When two continental crusts slide past one another its called.........
transform boundary
At a(n) , plates slip past each other.
transform boundarys
Seismic waves that are similar to sound waves.
vibration
Geologists use the moment magnitude scale to rate the total......... released by an earthquake.
energy
Breaks in Earth's crust where rocks have slipped past each other are called .
faults
The___________of an earthquake is the point where rock under stress begins to break or move.
focus
what are seismic waves
an elastic wave in the earth produced by an earthquake or other means.
At a(n) , plates come together.
boundary
Wegener's idea that the continents slowly moved over Earth's surface became known as .
continental drift
Plates move apart along a(n) .
divergent boundary
how do geologist locate the epicenter of an earthquake
They measure the difference of the arrival time of p waves and s waves and they study the seismic waves and find out their distance on the map where the circle intersect.
