Which data is used to make a sonar map of the ocean floor?
A. The amount of spreading that occurs on the ocean floor.
B. The time it takes an underwater vehicle to reach the ocean floor.
C. The time it takes for a pulse to bounce from the ocean floor.
D. The amount of light that reaches the ocean floor.
C. The time it takes for a pulse to bounce from the ocean floor.
Which describes how the Atlantic ocean and the Pacific ocean change over time?
A. The Atlantic ocean is getting larger while the Pacific Ocean is getting smaller.
B. Both the Atlantic ocean and the Pacific Ocean are getting larger.
C. Both the Atlantic ocean and the Pacific Ocean are getting smaller.
D. The Atlantic ocean is growing smaller, while the Pacific Ocean is getting larger.
B. Both the Atlantic ocean and the Pacific Ocean are getting larger.
Which pattern describes the ages of ocean rocks based on core samples from the ocean floor?
A. Younger rocks are warmer and are located closer to subduction zones.
B. Younger rocks are colder and are located closer to subduction zones.
C. Ingredients are warmer and barrel located closer to mid ocean ridges.
D.younger rockes are colder and are located closer to the mid ocean ridges
D. Younger rocks are colder and are located closer to the mid-ocean ridges.
What information is revealed by magnetism on rocks?
A. Age
B. Luster
C.mass
D. Minerals