The Rocky Mountains began forming in the western United States about 60 million years ago. The Appalachian Mountains and the Rocky Mountains were similar in height when they first formed. Which statements about the Rocky Mountains are true? Select the two correct answers.(1 point)
Responses
They are shorter than the Appalachian Mountains.
They are shorter than the Appalachian Mountains.
They are younger than the Appalachian Mountains.
They are younger than the Appalachian Mountains.
They are taller than the Appalachian Mountains.
They are taller than the Appalachian Mountains.
They are older than the Appalachian Mountains.
The correct statements about the Rocky Mountains are:
- They are younger than the Appalachian Mountains.
- They are taller than the Appalachian Mountains.
Why do scientists know very little about life in the Precambrian eon?(1 point)
Responses
The eon started with a mass extinction.
The eon started with a mass extinction.
There are few fossils from that time.
There are few fossils from that time.
All of these forms of life are now extinct.
All of these forms of life are now extinct.
There was no life on Earth during that eon.
The correct statement is:
- There are few fossils from that time.