Migration over time

12345678
Across
  1. 3. What does 'BC' mean?
  2. 4. Runner. Won Gold for england in 2012 Olympics
  3. 5. A period of 100 years is called a.....
  4. 8. What sort of famine caused Irish migration in 1845?
Down
  1. 1. When you arrange events in time order it's called.....
  2. 2. How many years in a decade?
  3. 6. What group of people conquered Britain in 1066?
  4. 7. Word used to describe money issues (begins with E)