UnScramble this Word: s e a h r r a s?

Questions

What is the red substance eastern woodland nativeAmericans used in their war paint called?

What is the right side of a ship called?

What is the Roman numeral for 400, which is also the most popular way to purchase music?

What is the Roman numeral mcdxlii in decimal?

What is the roughly circular hollow feature on the top of a volcano called?