Fill This Form To Receive Instant Help
Fill This Form To Receive Instant Help
Homework answers / question archive / Question 1 1 / 1 pts Oceanic crust is primarily made of Granite Basalt Aluminum compounds Potassium and uranium Question 2 1 / 1 pts Density is defined as: The speed that liquid moves over time The weight of a substance The mass per unit of volume or the relative heaviness of a substance The specific depth of Earth's layers Information can be found in the section 3
Question 1
1 / 1 pts
Oceanic crust is primarily made of
Granite
Basalt
Aluminum compounds
Potassium and uranium
1 / 1 pts
Density is defined as:
The speed that liquid moves over time
The weight of a substance
The mass per unit of volume or the relative heaviness of a substance
The specific depth of Earth's layers
Information can be found in the section 3.2, Earth’s Interior Is Layered.
1 / 1 pts
What is responsible for the formation of the Hawaiian Islands?
Two oceanic plates are converging at that location
Two oceanic plates are diverging at that location
Oceanic currents depositing large amounts of sediment
An oceanic plate moving over a stationary mantle plume and hot spot
1 / 1 pts
What is isostatic equilibrium?
Bands of magnetic reversal on the sea floor
An important chemical found in Earth's mantle
The mechanism that explains how continents drift
The geologic state when all the continents are joined into one super-continent
Balance between the weight of the continents and buoyant forces in the mantle
1 / 1 pts
What provides some of the most compelling evidence for sea floor spreading?
The fact that each plate moves at a different rate
The differences between oceanic and continental crust
Alternating bands of reversed and normal magnetic polarity in the sea floor.
Most continental shelves are submerged
Information can be found in section 3.10, The Confirmation of Plate Tectonics .
0 / 1 pts
Where is new sea floor being created?
Convergent plate boundaries
Divergent plate boundaries
Transform plate boundaries
1 / 1 pts
A widely accepted theory that explains the origin of earthquakes, mountains, the sea floor, submarine trenches, hydrothermal vents, volcanoes and island archipelagoes, among other geologic phenomena, is known as:
Plate tectonics
Convergence
Seafloor spreading
Subduction
See Chapter 3 (Note: correct answer is plate tectonics. All the other terms listed here as possible options are related to the broader concept of plate tectonics but they each refer to one specific aspect of the overall theory)
1 / 1 pts
How are P waves and S waves useful for scientists?
These waves help scientists to determine the nature of Earth's interior layers
They help scientists to determine the speed that different lithospheric plates move
Their reflection back to the surface helps us to form detailed images of the seafloor
They were originally used to help confirm the theory of continental drift and plate tectonics
1 / 1 pts
What is a major source of Earth's internal heat?
Isostatic equilibrium
Conduction
Solar radiation
Convection
Radioactive decay
0 / 1 pts
How do seafloor sediments help confirm plate tectonics?
Sediments are thickest and oldest at mid-ocean ridges, and at trenches they are thinner and younger
Most seafloor sediments are dated nearly the same age as the oldest rocks on the continents
The young spreading ridges are almost free of sediments and the oldest sediments at the edges of ocean basins are rarely more than 180 million years old
Sediment is evenly distributed across all ocean basins no matter where a sample is taken
1 / 1 pts
Which of these would have the LEAST amount of volcanic activity?
Divergent boundaries
Convergent boundaries between oceanic and continental plates
Convergent boundaries between two oceanic and plates
Transform boundaries
Chapter 3, Video
1 / 1 pts
Where will you find trenches and sea floor destruction?
Divergent plate boundaries
Transform plate boundaries
Convergent plate boundaries
1 / 1 pts
When two oceanic plates converge, what determines which plate will submerge?
The density of the crust
The temperature of the crust
The age of the crust
All of these
Information can be found in section 3.8, Plates Interact at Plate Boundaries.
1 / 1 pts
What characteristic is associated with convergent plate boundaries?
New crust formation
Solidification of crust materials
Spreading zones
Violent geological activity
Information can be found in the section 3.8, Plates Interact at Plate Boundaries.
1 / 1 pts
What type of plate boundary would create volcanic mountain chains on a continent (for example, the Andes mountains of South America)?
Transform plate boundaries
Convergent plate boundaries
Divergent plate boundaries
Passive plate boundary
