• U1 Lesson 2: How does Earth change?
     Help
  • (adj.) full of action or movement
    active
  • (n.) a very large rock
    boulder
  • (n.) someone or something that makes something else happen
    cause
  • Unlock this slideshow and over 4 million more with Baamboozle+
    Try slideshows
  • Your experience on this site will be improved by allowing cookies.