If we have not been to the center of the earth how do we know what the layers are.

5. what is a red giant? can our sun become a red giant? why or why not?

Match the letters with the correct terms

Select the best hypothesis explaining why countries may have preferred communism. communism promised jobs after the insecurities of war. communists forced the people to do what they said. communism was fueled by a dislike for democracy. communism provided economic freedom for businesses and workers.