Outer Layer
The Earth's outer layer is made of?
Hard Solid Rock
How do convergent plates move?
Towards each other
Which two processes occur due to plate motion ?
(a) volcanic eruptions and earthquakes
(b) earthquakes and tidal activity
(c) collision of crustal plates and erosion
(d) production of greenhouse gases and weathering
(a) volcanic eruptions and earthquakes
Plates slide past one another at ____.
a. subduction zones
b. convection currents
c. transform boundaries
d. divergent boundaries
c. transform boundaries
Which Earth layer contains convection currents that are believed to be responsible for the movement of Earth’s tectonic plates?
mantle
The _____ of the outer layer move gradually, every year.
plates
How do divergent plates move?
Away from each other
Similar rock formations have been discovered in the United States and Portugal. These rock formations were formed at the same time and are made of the same types of rocks. What type of boundary could explain how these rocks got so far apart?
Divergent Plate Boundaries. Where the plates slowly moved far apart as soft, solid rock from underneath got added to the edges of the plates over millions of years.
Name two geologic features or events that might result from the movement of crustal plates.
Earth quakes
Mountains
Volcanoes
How does the thickness of Earth’s oceanic crust compare to the thickness of the continental crust?
Continental crust is also less dense than oceanic crust, though it is considerably thicker
Earth’s outer layer is divided into sections called plates which are separated by___________.
Plate Boundaries
How do transform plates move?
In opposite directions and passing each other
____ are formed when two continental plates collide.
a. Volcanoes
b.Mountain ranges
c.Strike-slip faults
d. Rift valleys
The United States and Morocco are parts of different plates. The plates slowly moved far apart as soft, solid rock from underneath got added to the edges of the plates over millions of years.
What location on Earth’s surface where volcanoes are most likely to form?
Volcanoes are most likely to form at convergent plate boundaries between tectonic plates.
A team of engineers wants to study hard, solid rock under the surface of Earth. The team is considering drilling down in South Korea (1) and in the Yellow Sea (2). Where will the team find hard, solid rock?
under 1 and 2, because Earth’s entire outer layer is made of hard, solid rock
Which statement best describes Earth’s outer layer underneath the surface?
A. Underneath the soil, Earth’s outer layer is made of water.
B. Underneath both the soil and the ocean, Earth’s outer layer is made of sand and water.
C. Underneath the soil, Earth’s outer layer is made of hard, solid rock. Underneath the ocean, Earth’s outer layer is made of sand.
D. Underneath both the soil and the ocean, Earth’s outer layer is made of hard, solid rock.
D. Underneath both the soil and the ocean, Earth’s outer layer is made of hard, solid rock.
What happens at divergent plate boundaries?
a.) At divergent plate boundaries, rock rises from the mantle and hardens, adding new solid rock to the edges of both plates.
Weathering and erosion of Earth’s crust are primarily caused by
(a) gravity
(b) evaporation
(c) volcanic activity
(d) sedimentation
(a) gravity
How does the Theory of Plate Tectonics explain the location of the fossils found in South America and Africa?
(a) The continents were once joined together.
(b) The animals were able to swim from one continent to the other.
(c) Humans transported the animals from point A to point B.
(d) The animals developed independently on both continents.
(a) The continents were once joined together.
True or False: Earth’s plates move on top of a soft, solid layer of rock called the crust.
False, it is called the mantle
One factor that determines whether a volcanic eruption will be quiet or explosive is ____.
a. the number of cinder cones
b. the height of the volcano's vent
c. the amount of water vapor and other gases trapped in the magma
d. the amount of tephra in the magma
c. the amount of water vapor and other gases trapped in the magma
What happens at convergent plate boundaries?
b.) At convergent plate boundaries, one plate moves underneath the other plate and sinks into the mantle.
Why are fossils of species that once lived together found in different locations on Earth now?
The plates slowly moved far apart as soft, solid rock from underneath got added to the edges of the plates over millions of years.
Which evidence has led scientists to conclude that there are different layers within Earth’s interior?
(a) analysis of earthquake wave data
(b) rock samples taken from Earth’s core
(c) measurement of Earth’s diameter
(d) temperatures taken within each layer
(a) analysis of earthquake wave data
The relatively thin layer of rock at Earth’s surface is called the
(a) atmosphere
(b) lithosphere
(c) hydrosphere
(d) hemisphere
(b) lithosphere
The layer of solid, brittle rock that makes up the Earth's surface. The lithosphere is composed of the crust and the uppermost mantle