Who was the famous Viking who first discovered America before Columbus

Which of these are primary resources?

Which of these are Secondary resources?

How did the first indians get to America?

What boat did the English use to get to America

True or false: Columbus had discovered America First

Please explain who the Paleo-Indians were and what they are known for

Explain who Leif Erikkson is and what he's famous for

Explain who Christopher Columbus is and what he's famous for

Name a Primary and secondary source and why they're different