The correct response is:
the time it takes for a pulse to bounce from the ocean floor.
Sonar systems send sound pulses down to the ocean floor; the time it takes for these pulses to return is used to measure depth and create maps of the ocean floor.
Which data is used to make a sonar map of the ocean floor?(1 point)
Responses
the time it takes an underwater vehicle to reach the ocean floor
the time it takes an underwater vehicle to reach the ocean floor
the amount of light that reaches the ocean floor
the amount of light that reaches the ocean floor
the time it takes for a pulse to bounce from the ocean floor
the time it takes for a pulse to bounce from the ocean floor
the amount of spreading that occurs on the ocean floor
7 answers
Which describes how the Atlantic Ocean and the Pacific Ocean changes over time?(1 point)
Responses
Both the Atlantic Ocean and the Pacific Ocean are getting smaller.
Both the Atlantic Ocean and the Pacific Ocean are getting smaller.
Both the Atlantic Ocean and the Pacific Ocean are getting larger.
Both the Atlantic Ocean and the Pacific Ocean are getting larger.
The Atlantic Ocean is getting larger, while the Pacific Ocean is getting smaller.
The Atlantic Ocean is getting larger, while the Pacific Ocean is getting smaller.
The Atlantic Ocean is growing smaller, while the Pacific Ocean is getting larger.
Responses
Both the Atlantic Ocean and the Pacific Ocean are getting smaller.
Both the Atlantic Ocean and the Pacific Ocean are getting smaller.
Both the Atlantic Ocean and the Pacific Ocean are getting larger.
Both the Atlantic Ocean and the Pacific Ocean are getting larger.
The Atlantic Ocean is getting larger, while the Pacific Ocean is getting smaller.
The Atlantic Ocean is getting larger, while the Pacific Ocean is getting smaller.
The Atlantic Ocean is growing smaller, while the Pacific Ocean is getting larger.
The correct response is:
The Atlantic Ocean is getting larger, while the Pacific Ocean is getting smaller.
This occurs due to tectonic plate movements, where the Atlantic Ocean is gradually widening as the North American and Eurasian plates move apart, while the Pacific Ocean is being reduced in size due to subduction of the Pacific Plate beneath surrounding plates.
Which pattern describes the ages of ocean rocks based on core samples from the ocean floor?(1 point)
Responses
Younger rocks are colder and are located closer to mid-ocean ridges.
Younger rocks are colder and are located closer to mid-ocean ridges.
Younger rocks are colder and are located closer to subduction zones.
Younger rocks are colder and are located closer to subduction zones.
Younger rocks are warmer and are located closer to subduction zones.
Younger rocks are warmer and are located closer to subduction zones.
Younger rocks are warmer and are located closer to mid-ocean ridges.
Responses
Younger rocks are colder and are located closer to mid-ocean ridges.
Younger rocks are colder and are located closer to mid-ocean ridges.
Younger rocks are colder and are located closer to subduction zones.
Younger rocks are colder and are located closer to subduction zones.
Younger rocks are warmer and are located closer to subduction zones.
Younger rocks are warmer and are located closer to subduction zones.
Younger rocks are warmer and are located closer to mid-ocean ridges.
The correct response is:
Younger rocks are warmer and are located closer to mid-ocean ridges.
Mid-ocean ridges are where new oceanic crust is formed through volcanic activity, making the rocks there younger and typically warmer compared to older rocks that are further away from the ridges.
What information is revealed by magnetism on rocks?(1 point)
Responses
minerals
minerals
mass
mass
age
age
luster
Responses
minerals
minerals
mass
mass
age
age
luster
The correct response is:
minerals.
Magnetic properties of rocks reveal information about the minerals present, particularly those containing iron, which can record the Earth's magnetic field orientation at the time the rocks formed.
1 answer