The invention that made it easier to remove seeds from cotton, increasing production.
What is the cotton gin?
The belief that Americans were meant to expand across the continent.
What is Manifest Destiny?
The system that helped enslaved people escape to freedom.
What is the Underground Railroad?
The president of the United States during the Civil War.
Who is Abraham Lincoln?
The preserved remains or traces of ancient organisms.
What is a fossil?
The machine invented by Robert Fulton that made river travel faster.
What is the steamboat?
The trail that thousands of settlers traveled on to move west.
What is the Oregon Trail?
The formerly enslaved man who became a famous speaker and abolitionist.
Who is Frederick Douglass?
The document that freed enslaved people in Confederate states.
What is the Emancipation Proclamation?
The process where certain traits help animals survive and are passed down over time.
What is natural selection?
The type of mills that turned cotton into cloth.
What are textile mills?
The major U.S. city known as the "Gateway to the West."
What is St. Louis?
The book written by Harriet Beecher Stowe that described the cruelty of slavery.
What is Uncle Tom’s Cabin?
These northern states did not want slavery anywhere, not even in the south.
What are the Union States?
A trait, such as camouflage, that helps an organism survive.
What is an adaptation?
The process of making goods using machines instead of by hand.
What is manufacturing?
The railroad completed in 1869 that connected the East and West Coasts.
What is the Transcontinental Railroad?
The term for people who wanted to end slavery in the United States.
Who are abolitionists?
The holiday that celebrates when enslaved people in Texas learned they were free.
What is Juneteenth?
The name for animals moving to a new location for better survival conditions.
What is migration?
The waterway that helped connect the Great Lakes to the Atlantic Ocean, boosting trade and transportation.
What is the Erie Canal?
The event in California that caused a huge increase in settlers moving west in 1849.
What is the Gold Rush?
These states separated from the United States of America to maintain their system of slavery and states' rights.
What are the Confederate States?
The amendment that officially ended slavery in the U.S.
What is the Thirteenth Amendment?
The reason why some fossils of tropical plants have been found in Antarctica.
What is the climate was once warmer?