What was unknown to scientists during Wegener’s time?(1 point)
Responses
Fossils were found in many places.
Fossils were found in many places.
Mountain ranges of some continents lined up.
Mountain ranges of some continents lined up.
The coasts of some continents fit together.
The coasts of some continents fit together.
Earth’s crust is made of plates that move.
The response "Earth’s crust is made of plates that move." is correct. This concept of plate tectonics was unknown to scientists during Wegener's time.
Which continents have coastlines and mountain ranges that match up?(1 point)
Responses
Africa and South America
Africa and South America
North America and South America
North America and South America
Asia and Antarctica
Asia and Antarctica
Africa and North America
The continents that have coastlines and mountain ranges that match up are Africa and South America.
What did scientists observe in the ocean floor which indicates that the Pacific Ocean is becoming smaller?(1 point)
Responses
plates floating on the mantle
plates floating on the mantle
subduction
subduction
continental drift
continental drift
spreading
The response "spreading" is correct. Scientists observed spreading in the ocean floor, which indicates that the Pacific Ocean is becoming smaller.
Which data is used to make a sonar map of the ocean floor?(1 point)
Responses
the amount of spreading that occurs on 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
the time it takes for a pulse to bounce from 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 an underwater vehicle to reach the ocean floor
The response "the time it takes for a pulse to bounce from the ocean floor" is correct. This data is used to make a sonar map of the ocean floor.
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.
The response "The Atlantic Ocean is getting larger, while the Pacific Ocean is getting smaller." is correct. This describes how the Atlantic Ocean and the Pacific Ocean change over time.
Which pattern describes the ages of ocean rocks based on core samples from the ocean floor?(1 point)
Responses
Younger rocks are warmer and are located closer to mid-ocean ridges.
Younger rocks are warmer and are located closer to mid-ocean ridges.
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 colder and are located closer to subduction zones.
Younger rocks are colder and are located closer to subduction zones.
Younger rocks are colder and are located closer to mid-ocean ridges.