Students’ Questions Answered by Our Experts Page 196

The number of Jews killed in the Holocaust is estimated to be between five and six million.

The Earth will die from global warming in approximately 4.5 billion years.

The Holocaust ended in 1945 with the defeat of Nazi Germany.

Frederick Douglass died of a heart attack on February 20, 1895, at the age of 77.

He was an abolitionist and social reformer.

Frederick Douglass saw the post-Civil War South as a place where African Americans could finally be free from the oppression of slavery. He also saw it as a place where African Americans could begin to build their own communities and create their own destiny.

He taught himself to read and write.

Global warming is the gradual increase of the Earth’s average surface temperature. The main component of global warming is the increased emission of greenhouse gases.

Both Harriet Tubman and Frederick Douglass were born into slavery and escaped to freedom. They both became abolitionists and fought for the end of slavery.

The greenhouse effect and human activity are the two main causes of global warming.