TEKS: 4.2A plan and implement descriptive investigations, including asking well-defined questions, making inferences, and selecting and using appropriate equipment or technology to answer his / her questions. 4.2B collect and record data by observing and measuring, using the metric system, and using descriptive words and numerals such as labeled drawings, writing, and concept maps. 4.2C construct simple tables, charts, bar graphs, and maps using tools and current technology to organize, examine, and evaluate data. 4.2D analyze data and interpret patterns to construct reasonable explanations from data that can be observed and measured. 4.2F communicate valid, oral, and written results supported by data. 4.3A in all fields of science, analyze, evaluate, and critique scientific explanations by using empirical evidence, logical reasoning, and experimental and observational testing, including examining all sides of scientific evidence of those scientific explanations, so as to encourage critical thinking by the student.