A string of islands known as a(n) _______ can form from the collision of two
oceanic plates.
Question 15
15.
The hypothesis of _______ was that all the continents once were joined as a single supercontinent and have since drifted apart.
Question 16
16.
When continental plates pull apart at a divergent boundary on land, a(n)
_______ forms
Question 17
17.
The process of _______ continually adds new crust to the ocean floor along both sides of the mid-ocean ridge.
Question 18
18.
When you touch a hot plate, the transfer of heat from the plate to your hand is called_______
Question 19
19.
One major belt of volcanoes is called the _______
Question 20
20.
_______ causes the movement of Earth's plates.
Question 21
21.
Question 22
22.
Question 23
23.
Question 24
24.
Question 25
25.
Question 26
26.
Question 27
27.
What feature occurs at X and how does it form?
Question 28
28.
Describe what is happening at point Z in the illustration.
Question 29
29.
Name the three types of evidence geologists have found for sea-floor spreading.
Question 30
30.
Cite evidence from a landform and fossil to support the hypothesis that Africa and South
America were once joined.
Question 31
31.
During Continental Drift, name the continent that moved the farthest.
The transfer of energy through the air is called
conduction
radiation
convection
subduction
Old oceanic crust is more dense than new oceanic crust because it is
hot
moving toward a deep-ocean trench
cool
closer to the mid-ocean ridge
According to Wegener’s hypothesis of continental drift,
Earth’s surface is made up of seven major landmasses.
the continents do not move.
Earth is slowly cooling and shrinking.
the continents were once joined together in a single landmass.
A place where two plates slip past each other, moving in opposite directions, is known as a
transform boundary
convergent boundary.
divergent boundary.
rift valley
In which location would you most likely find volcanoes?
far from plate boundaries
along transform boundaries
where two continental plates collide
along mid-ocean ridges and where a plate is subducted
Particles of hot soup rise slowly in a pot simmering on a stove. As the hot soup nears the surface, it begins to cool. The cooler soup sinks, forming a constant movement of soup that moves energy toward the surface of the pot. This constant movement of the soup in the pot is called a(n)
magnetic field.
convection current.
energy system.
conduction loop.
A collision between two pieces of continental crust at a converging boundary produces a
mid-ocean ridge
rift valley.
deep-ocean trench.
mountain range.
In sea-floor spreading, molten material rises from the mantle and erupts
along the edges of all the continents.
along mid-ocean ridges.
in deep-ocean trenches.
at the north and south poles.
The geological theory that states that pieces of Earth’s lithosphere are in constant, slow motion is the theory of
subduction.
deep-ocean trenches.
plate tectonics.
sea-floor spreading.
At what point does magma become lava?
below a vent
inside a pipe
at Earth's surface
in Earh's mantle
What is Pangaea?
name of a German scientist
name of the supercontinent that existed millions of years ago
another name for continental drift
name of a fossil
Which of the following is evidence for sea-floor spreading?
matching patterns of magnetic stripes found in the crust of the ocean floor
new rock found further from mid-ocean ridges than older rock
pieces of different crust found on different continents
changes in climate on the continent of Africa
What technology did scientists use in the mid-1900s to map the mid-ocean ridge?
satellites
deep-sea diving
submarines
sonar
Along a divergent boundary, two plates slip past each other, moving in opposite directions.
True
False
Alfred Wegener provided evidence from landforms, fossils, and climate in support of his theory of the Continental Drift.
True
False
If subduction occurs faster than oceanic crust can be created, an ocean will expand.
True
False
Oceanic crust near the mid-ocean ridge is younger than oceanic crust farther away from the ridge.
True
False
Volcanoes that form along a mid-ocean ridge occur at a(n) diverging plate boundary.
True
False
Mid-ocean ridges form the longest mountain ranges on Earth.