Unit 1 - Lesson 2 - Bird Migration

(n) movement from one place to another

(v) to live in

(v) to interest greatly

(n) a person who watches something

(n) a priority; an urgent need

(v) to develop and change

(v) to reproduce

(a) best; most favorable

(n) one half of the Earth; one half of a sphere

(n) type; a bas ic group in biological classification