How do scientists know that some mountains were once at the bottom of an ocean?

A planet is disA planet is discovered orbiting around a star in the galaxy Andromeda at four times the distance from the star as Earth is from the Sun.

Why would you expect to see similar rocks and rock structures on two landmasses that were connected at one time?

A summary of the "year without a summer" of 1816? What was it? How this related to plate tectonics? How did it affect human Society?

Which area has a grassland ecosystem? Eastern United States, Central United States, Southwestern United States or Alaska & Northern Canada

How does law enforcement in the United States differ compared to other countries in the world? Briefly describe some of the most important principles in American law enforcement.

The statement, "People celebrate their birthdays on January 1st" is an example of what type of region? climate cultural physical political

What mountain ranges are part of the cordillera

Research shows that fragmentation results in losing A. more soil to soil erosion. B. the biggest species first. c. areas for human colonization D. the amount of precipitation.

How are aftershocks different from earthquakes? A. Aftershocks last longer than earthquakes. B. Aftershocks are hard for scientists to study. C. Aftershocks are not as strong as earthquakes. D. Aftershocks cause waves and shaking in the Earth.

What did the Middle Colonies do for living/jobs/work NOT the slaves.