Westward Expansion Pictionary Dictionary Directions: For each term you must: Find the definition, draw a picture of the term and use the term in a sentence. Term Erosion Sod Technological Advances Relocation Traditional Lands Definition Illustration Your Sentence Assimilation Treaty Transcontinental Reservation 1. Erosion- gradual wearing away of soil 2. Sod- strip of earth with grass growing on top and roots holding it together 3. Technological Advances- new inventions 4. Relocation- movement to a new place for a long time 5. Traditional Lands- land where American Indians originally lived 6. Assimilation-process of taking on the habits of the larger group 7. Treaty- formal agreement between two leaders 8. Transcontinental- across the entire country 9. Reservation- area of land set aside for American Indians