Ess 101 Quiz Questions With Correct
Detailed Answers.
Which lines get closer as they approach the poles? Lines of latitude or lines of
longitude? - ANSWER- Longitude
Draw a diagram showing lines of latitude and longitude on a globe that indicates your
answer to which of the lines get closer as they approach the poles. - ANSWER-
What could explain the asymmetry of magnetic stripes on the ocean floor? - ANSWER-
The seafloor spreading with reversing poles of the earth with the cooling of magma
locking the magnetism into the earth.
What is the difference between fracture and cleavage for a mineral? How can you
distinguish between them when looking at a sample? - ANSWER- Cleavage is the break
of a crystal face whereas the fracture is the chipping of the mineral. The fracture leaves
a rough and uneven surface but the cleavage is split along a plane. Cleavages are flat
and reflect light.
What does mafic mean? - ANSWER- Dark colored, richer in Mg and Fe
What are two mafic minerals? - ANSWER- Pyroxene, Plagioclase
What does felsic mean? - ANSWER- light colored, feldspar and quartz
What are two felsic minerals? - ANSWER- quartz, muscovite, orthoclase
What does Bowen's reaction series represent? - ANSWER- Bowen's reaction series is a
means of ranking common igneous silicate minerals by the temperature at which they
crystallize.
How do porphyritic-textured igneous rocks form? - ANSWER- In the first stage, the
magma is cooled slowly deep in the crust, creating the large crystal grains then the
magma cools rapidly at shallow depths/as it erupts from a volcano, creating the small
grains.
How does lava viscosity affect the slope of a volcano? - ANSWER- More viscosity, more
steep. Low viscosity, less steep.
What is a clastic sedimentary rock? - ANSWER- Clastic: are made from sediments that
come from preexisting rocks that have been weathered (breaking down into smaller
pieces) and eroded (transported away) then "glued" together (lithified).
