Inference - something you figure out based on observations and what you already know., model - something scientists make to answer questions about real world., observation - something you notice using any of the 5 senses, pattern - something we observe to be similar over and over again, rock layer - a thick sheet of rock formed from the same material, sediment - small pieces of rock, such as slit or sand, sedimentary rock - a type of rock formed from sediment that compacts and cements over time., stable - staying mostly the same, argument - the use of evidence to say why one idea is the best, cement - to stick together in the process of forming rock, claim - a proposed answer to a question, data - observations or measurements recorded in an investigation, environment - all the living and nonliving things in an area, erosion - when rock, soil or sand is worn down and moved from one place to another by water, wind or ice., evidence - information that supports and answer to a question, fossil - a clue about life from the past that is preserved in rock, geologist - a scientist who studies the processes and materials that form the solid part of Earth,

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