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

Vocabulary

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

Vocabulary

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

Vocabulary

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

Vocabulary

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

Vocabulary

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

Vocabulary

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

• http://www.classzone.com/books/earth_science/terc/content/visualizations/es0804/es0804page01.cfm?chapter_no=visualization

Vocabulary

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

Vocabulary

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