1. Which data is used to make a sonar map of 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 spreading that occurs on the ocean floor
the time it takes for a pulse to bounce from the ocean floor
2. Which describes how the Atlantic Ocean and the Pacific Ocean changes over time?(1 point)
Both the Atlantic Ocean and the Pacific Ocean are getting larger.
The Atlantic Ocean is growing smaller, while the Pacific Ocean is getting larger.
The Atlantic Ocean is getting larger, while the Pacific Ocean is getting smaller.
Both the Atlantic Ocean and the Pacific Ocean are getting smaller.
3. Which statement correctly compares earthquakes at mid-ocean ridges and plate boundaries?(1 point)
The depth of an earthquake’s focus is greater at mid-ocean ridges.
The depth of an earthquake’s focus is greater at plate boundaries.
Earthquakes occur at mid-ocean ridges, but not at plate boundaries.
Earthquakes occur at plate boundaries, but not at mid-ocean ridges.
4. What information is revealed by magnetism on rocks?(1 point)
minerals
luster
age
mass
The correct answers are:
1. the time it takes for a pulse to bounce from the ocean floor
2. The Atlantic Ocean is growing smaller, while the Pacific Ocean is getting larger.
3. Earthquakes occur at plate boundaries, but not at mid-ocean ridges.
4. age
1. The data used to make a sonar map of the ocean floor is the time it takes for a pulse to bounce from the ocean floor.
2. The Atlantic Ocean is getting larger, while the Pacific Ocean is getting smaller.
3. Earthquakes occur at plate boundaries, but not at mid-ocean ridges.
4. Magnetism on rocks reveals information about their age.