quiz #2 earth science
A continental volcanic arc occurs in which of the following types of plate boundaries?
An oceanic-continental convergent plate boundary
Earth's magnetic field is generated by
the flow of the liquid outer core
The San Andreas Fault, in California, is an example of a ...
transform plate boundary
There are three types of plate boundaries. Plate boundaries where two plates SLIDE SIDEWAYS PAST each other are called ...
Transform plate boundaries
The most abundant chemical element in our WHOLE planet (35% of the planet's composition) is ...
iron (Fe)
Alfred Wegener proposed that continents had once been joined together to form a large supercontinent, and had subsequently drifted apart. This idea is known as ...
continental drift
There are three types of plate boundaries. Plate boundaries where two plates move AWAY from each other are called ...
divergent plate boundaries
The East-African Rift is a typical feature that occurs in which of the following types of plate boundaries?
divergent plate boundary
Which of the following Earth layers contains the lowest density?
earth's crust
Which of the following Earth layers contains the highest temperature?
earth's inner core
Which of the following statements is correctly describing the behavior of pressure and temperature at different Earth layers?
As depth increases, both pressure and temperature increase.
One important piece of evidence supporting Wegener's idea came from the discovery of the magnetic banding of rocks from the seafloor. Which of the following options is correct regarding the age and magnetic polarity of these rocks? (mark all that applies) The age and magnetic polarity of rocks on both sides of the mid-ocean ridges are ASYMMETRICAL, i.e., the banding on one side DOES NOT MATCH the banding on the other side. The YOUNGEST band of rocks are found along the mid-ocean ridges while the OLDEST band of rocks are found far away from the ridge. The sea-floor is composed of magnetized rocks with alternating bands of normal and reversed polarity. The age and magnetic polarity of rocks on both sides of the mid-ocean ridges are SYMMETRICAL, i.e., the banding on one side MATCHES the banding on the other side. The OLDEST band of rocks are found along the mid-ocean ridges while the YOUNGEST band of rocks are found far away from the ridge.
The YOUNGEST band of rocks are found along the mid-ocean ridges while the OLDEST band of rocks are found far away from the ridge. The sea-floor is composed of magnetized rocks with alternating bands of normal and reversed polarity. The age and magnetic polarity of rocks on both sides of the mid-ocean ridges are SYMMETRICAL, i.e., the banding on one side MATCHES the banding on the other side.
A volcanic island arc occurs in which of the following types of plate boundaries?
oceanic-oceanic convergent?
Earth's magnetic field is generated by ...
the flow of the liquid outer core
According to the modern classification of Earth layers, the only one whose physical state is liquid is ...
the outer core
The "Iron Catastrophe" is ... (mark all that applies) ... an event early in Earth's history when the planet acquired a magnetic field which protect it from the solar wind. ... an event early in Earth's history when Earth underwent differentiation into a dense, metallic core, a plastic and rocky mantle, and a brittle and rocky crust. ... an event early in Earth's history when Earth partialy melted and heavier elements (such as iron) sank to the center of the planet, and lighter elements (such as silicon) migrated to the surface of the planet. ... an event early in Earth's history when Earth partialy melted and heavier elements (such as iron) migrated to the surface of the planet, and lighter elements (such as silicon) sank to the center of the planet.
... an event early in Earth's history when the planet acquired a magnetic field which protect it from the solar wind. ... an event early in Earth's history when Earth underwent differentiation into a dense, metallic core, a plastic and rocky mantle, and a brittle and rocky crust. ... an event early in Earth's history when Earth partialy melted and heavier elements (such as iron) sank to the center of the planet, and lighter elements (such as silicon) migrated to the surface of the planet.
One important piece of evidence supporting Wegener's idea came from the discovery of the magnetic banding of rocks from the seafloor. Which of the following options is correct regarding the age and magnetic polarity of these rocks? (mark all that applies) The OLDEST band of rocks are found along the mid-ocean ridges while the YOUNGEST band of rocks are found far away from the ridge. The age and magnetic polarity of rocks on both sides of the mid-ocean ridges are SYMMETRICAL, i.e., the banding on one side MATCHES the banding on the other side. The YOUNGEST band of rocks are found along the mid-ocean ridges while the OLDEST band of rocks are found far away from the ridge. The age and magnetic polarity of rocks on both sides of the mid-ocean ridges are ASYMMETRICAL, i.e., the banding on one side DOES NOT MATCH the banding on the other side. The sea-floor is composed of magnetized rocks with alternating bands of normal and reversed polarity.
The sea-floor is composed of magnetized rocks with alternating bands of normal and reversed polarity. The age and magnetic polarity of rocks on both sides of the mid-ocean ridges are SYMMETRICAL, i.e., the banding on one side MATCHES the banding on the other side. The YOUNGEST band of rocks are found along the mid-ocean ridges while the OLDEST band of rocks are found far away from the ridge.
Which of the following Earth layers contains the largest volume of material?
earth's mantle
Which of the following statements is true regarding the composition and structure of the Earth's core?
The core consists of iron alloy and has two parts: the outer core is liquid, while the inner core is solid.
The Continental Drift Theory was dismissed by the scientific community because ...
...
The majority of rocks on Earth's surface contain ...
...
Which idea was the focal point of disagreement between American and European geologists at the beginning of the 1900s?
Continental drift
There are three types of plate boundaries. Plate boundaries where two plates move TOWARDS each other are called ...
Convergent plate boundaries
Which of the following Earth layers contains the highest density?
Earth's inner core
According to the Plate Tectonics theory, NEW (young) seafloor rocks are being FORMED at ...
Mid ocean ridges
After World War II, there was renewed interest in the study of the ocean floor. Besides finding out that the ocean floor is not flat, scientists also discovered that the oceanic crust was VERY different than the continental crust. Which of the following options list these differences? (mark all that applies) Oceanic crust is THINNER than continental crust. Oceanic crust is more MAGNETIC than continental crust because of its iron content. The COMPOSITION of oceanic crust is FELSIC (rich in iron and magnesium), while continental crust is MAFIC (rich in silica). The COMPOSITION of oceanic crust is MAFIC (rich in iron and magnesium), while continental crust is FELSIC (rich in silica). Oceanic crust is THICKER than continental crust.
Oceanic crust is THINNER than continental crust. Oceanic crust is more MAGNETIC than continental crust because of its iron content. The COMPOSITION of oceanic crust is MAFIC (rich in iron and magnesium), while continental crust is FELSIC (rich in silica).
The oldest rock in the ocean floor is about 200 million years old. In contrast, the oldest rock in the continents is about 4 billion years old. The correct explanation for such a discrepancy is ...
Oceanic crust is recycled at subduction zones before getting too old.
The name of the single continent proposed by Alfred Wegener is ...
Pangea
Although temperatures at the inner core (9,000-11,000 F°) are much higher than the outer core (7,000-9,000 F°), the inner core is not molten. The correct explanation for this phenomenon is ...
Pressures at the inner core are high enough to prevent melting from happening.
Harry Hess proposed that new ocean floor is formed at mid-ocean ridges, and then moves away symmetrically from the ridge axis until sinking back into the mantle at subduction zones. This idea is known as ...
Seafloor Spreading
Which of the following options is true regarding the rocks in the ocean floor? (mark all that applies) Seafloor rocks are LESS MAGNETIC than continental rocks. Seafloor rocks are MORE DENSE than continental rocks. Seafloor rocks are mostly PLUTONIC in origin. Seafloor rocks are LESS DENSE than continental rocks. Seafloor rocks are MORE MAGNETIC than continental rocks. Seafloor rocks are mostly VOLCANIC in origin.
Seafloor rocks are MORE DENSE than continental rocks. Seafloor rocks are MORE MAGNETIC than continental rocks. Seafloor rocks are mostly VOLCANIC in origin.
Iceland is an island formed by a hot spot located on which of the following types of plate boundaries?
a divergent plate boundary
The lithosphere, a rigid shell of rock, is formed by ...
by the crust plus the upper part of the mantle
According to the Plate Tectonics theory, OLD (about 200 million-years old) seafloor rocks are being RECYCLED at ...
subduction zones
The slow motion of Earth's rocky but plastic mantle, which is the "engine" behind the drifting of rigid tectonic plates at Earth's crust, is known as ...
whole-mantle convection