The PDF document contains word wall terms with associated pictures to help trigger students' memory of the term and its definition. I have also attached a word strip of each term in Spanish so that you may add it, if you wish.
These work great with the vinyl pockets from Lone Star Learning (http://store.lonestarlearning.com/shop/vinyl-pockets/)
Vocabulary terms include:
theory of plate tectonics
sea floor spreading
This is also the Vocabulary of Instruction for the CSCOPE 8th grade science curriculum Unit 7 that is widely used in the State of Texas.