1. unit 19 words & Definitions
asteroid
astrology
astronomer
astronomy
biographer
1. (n) a rocky object orbiting the sun
2. (n) the study of planets and human behavior
3. (n) a person who studies the universe
4. (n) the scientific study of the universe
5. (n) a person who writes books about people’s lives

2. unit 19 words & Definitions
biography
biology
geography
geology
geologist
6. (n) an account of somebody's life
7. (n) the science or study of life
8. (n) the study of the earth’s physical features
9. (n) the study of rocks and minerals
10. (n) a person who studies rocks and minerals