Transcript Review Unit 1 - Effingham County Schools

Review Unit 1B
Inside the Earth
• #44. A Convergent Boundary is a
boundary is where two tectonic plates
come together, or collide. This can form
mountains, and trenches.
#45. A Divergent Boundary is where two
tectonic plates pull away or separate. This
can create new ocean floor and cause
magma to rise to surface.
#46. A Transform Boundary is where two
tectonic places slide past each other.
These type of boundaries are where most
earthquakes occur.
#47. Why would a large, nonvolcanic
mountain on a flat plain be very unusual
on the Earth’s surface? Volcano and
mountains form at convergent plate
boundaries. Areas near these plate
boundaries are never smooth.
#48. List the six layers of the Earth.
Inner Core
Outer Core
Mantle
Asthenosphere
Lithosphere
Crust (oceanic and continental)
#49. A deep well or mine shaft goes through
which layer or layers of Earth? Crust only
#50. When magma reaches Earth's surface
it becomes lava.
• #51 Earth’s crust
• Section V is solid iron –
intense pressure
• Section IV is molten iron
• Section III and II are
magma (liquid) –
convection currents
• Section I is solid
#52. Compared to rocks in Earth's crust,
rocks in the mantle are more dense.
#53. Areas on Earth's surface that lie above
the places where tectonic plates meet are
characterized by frequent earthquake
activity.
#54. Most earthquakes and volcanoes
occur in areas of the Pacific Ocean called
"The Ring of Fire.” The main reason is
that Lithosphere plate boundaries are
found in that area
#55. A tsunami is a common secondary
effect of a large earthquake off the coast.
#56. Uniformitarianism states that in an
undisturbed layer of rock, older rocks lie at
the bottom and younger rocks lie at the
top.
#57. Since there are no rock layers that
have fossils of both dinosaur and horse
remains scientists know that dinosaurs
and horses did not exist in the same
geological eras.
#58. What is the MAIN reason that the
continents look very different than they did
100 million years ago? The continents
have drifted apart from one another on
lithospheric plates.
#59. Fossils of a particular animal species
have been found in both southern Africa
and South America but nowhere else. The
MOST LIKELY reason?
In the past, Africa and South America were
part of the same continent.
#60. A fossil of an ocean fish was found in a
rock outcrop on a mountain. This probably
means that the mountain was raised up
after the fish died.