1. Continental Drift The theory by Alfred Wegener that continents can drift apart form one another and have done so in the past.

2. Vocabulary convergent boundary The area where two tectonic plates push into one another.

3. Vocabulary convergent boundary The area where two tectonic plates push into one another.

5. Vocabulary divergent boundaries The area where two tectonic plates move away from one another.

6. Vocabulary divergent boundaries The area where two tectonic plates move away from one another.

9. Vocabulary transform boundaries The area where two tectonic plates slide past each other horizontally.

10. Vocabulary transform boundaries The area where two tectonic plates slide past each other horizontally.

13. http://www.classzone.com/books/earth_science/te rc/content/visualizations/es0804/es0804page01.cf m?chapter_no=visualization http://www.classzone.com/books/earth_science/te rc/content/visualizations/es0804/es0804page01.cf m?chapter_no=visualization

14. Vocabulary constructive forces Forces that build up, or add to the surface of the Earth.

15. Vocabulary deconstructive forces Forces that wear down, or take away material from the surface of the Earth.