Scientific investigation and reasoning

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The student conducts classroom and outdoor investigations, following home and school safety procedures and environmentally appropriate and ethical practices. The student is expected to:
Demonstrate safe practices and the use of safety equipment as described in Texas Education Agency-approved safety standards during classroom and outdoor investigations using safety equipment, including safety goggles or chemical splash goggles, as appropriate, and gloves, as appropriate; and
Make informed choices in the use and conservation of natural resources and reusing and recycling of materials such as paper, aluminum, glass, cans, and plastic.
The student uses scientific practices during laboratory and outdoor investigations. The student is expected to:
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;
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;
Construct simple tables, charts, bar graphs, and maps using tools and current technology to organize, examine, and evaluate data;
Analyze data and interpret patterns to construct reasonable explanations from data that can be observed and measured;
Perform repeated investigations to increase the reliability of results; and
Communicate valid oral and written results supported by data.
The student uses critical thinking and scientific problem solving to make informed decisions. The student is expected to:
Analyze, evaluate, and critique scientific explanations by using evidence, logical reasoning, and experimental and observational testing;
Represent the natural world using models such as the water cycle and stream tables and identify their limitations, including accuracy and size; and
Connect grade-level appropriate science concepts with the history of science, science careers, and contributions of scientists.
The student knows how to use a variety of tools, materials, equipment, and models to conduct science inquiry. The student is expected to
Collect, record, and analyze information using tools, including calculators, microscopes, cameras, computers, hand lenses, metric rulers, Celsius thermometers, mirrors, spring scales, balances, graduated cylinders, beakers, hot plates, meter sticks, magnets, collecting nets, and notebooks; timing devices; and materials to support observation of habitats of organisms such as terrariums and aquariums.

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