Test questions
What 2 pieces of evidence most strongly suggests that the continents were once joined?
They fit together like puzzle pieces
They have similar crust compositions and rock formations
Where is the highest risk of earthquakes in the U.S.?
California
Which of the following is a way in which inner earth material is returned to the surface?
volcanic eruption
how is an igneous rock formed
magma, volcanic activity, cooling (crystalization)
Which of Earth layers is liquid and composed of iron and nickel?
outer core
True of False: Plate tectonics is the scientific theory describing the large-scale motion of large plates and the movements of a number of smaller plates of the Earth's surface.
true
Point on Earth's surface directly above the focus, pertaining to an earthquake.
epicenter
What happens to older oceanic crust as new rock is formed during seafloor spreading?
how is a metamorphic rock formed?
Which of the following layers of Earth has the greatest density?
inner core
what is evidence that support the theory of continental drift?
fossils on continents separated by oceans
In December 2005, an earthquake happened off the coast of the Philippines. Thousands of people on the island died because of a giant wave. What was the giant wave?
tsunami
What is the process by which new oceanic crust is added?
how is a sedimentary rock formed?
erosion, deposition, compaction, cementation
Where are the tectonic plates located?
What is the point in the Earth at which an earthquake begins?
focus
The San Andreas Fault is located in California. Annually, it is responsible for many earthquakes. Look at the image taken after the 1906 earthquake, which shows a fence that crosses the fault at a right angle. The fence was originally built in a straight line. What type of motion along the San Andreas Fault explains the change to the fence?
The plates slide past one another.
What boundaries do volcanoes form in?
convergent and divergent
Which of the following best describes what most rocks are composed of?
minerals
Which events are most common along tectonic plate boundaries
earthquakes and volcanoes
The lower part of the mantle is called
Mesosphere
What plate boundaries do earthquakes occur at?
all of them
Which events are most common along tectonic plate boundaries
earthquakes and volcanoes
What is molten rock under the ground?
magma
Seafloor spreading and continental drift are believed to be caused by