A 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

B 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.

A 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;

B 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;

C construct simple tables, charts, bar graphs, and maps using tools and current technology to organize, examine, and evaluate data;

D analyze data and interpret patterns to construct reasonable explanations from data that can be observed and measured;

E perform repeated investigations to increase the reliability of results; and

F communicate valid oral and written results supported by data.

A analyze, evaluate, and critique scientific explanations by using evidence, logical reasoning, and experimental and observational testing;

B represent the natural world using models such as the water cycle and stream tables and identify their limitations, including accuracy and size; and

C connect grade-level appropriate science concepts with the history of science, science careers, and contributions of scientists.

A 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.

A measure, compare, and contrast physical properties of matter, including mass, volume, states (solid, liquid, gas), temperature, magnetism, and the ability to sink or float; and

B compare and contrast a variety of mixtures, including solutions.

A differentiate among forms of energy, including mechanical, sound, electrical, light, and thermal;

B differentiate between conductors and insulators of thermal and electrical energy;

C demonstrate that electricity travels in a closed path, creating an electrical circuit; and

D design a descriptive investigation to explore the effect of force on an object such as a push or a pull, gravity, friction, or magnetism.

A examine properties of soils, including color and texture, capacity to retain water, and ability to support the growth of plants;

B observe and identify slow changes to Earth's surface caused by weathering, erosion, and deposition from water, wind, and ice; and

C identify and classify Earth's renewable resources, including air, plants, water, and animals, and nonrenewable resources, including coal, oil, and natural gas, and the importance of conservation.

A measure, record, and predict changes in weather;

B describe and illustrate the continuous movement of water above and on the surface of Earth through the water cycle and explain the role of the Sun as a major source of energy in this process; and

C collect and analyze data to identify sequences and predict patterns of change in shadows, seasons, and the observable appearance of the Moon over time.

A investigate that most producers need sunlight, water, and carbon dioxide to make their own food, while consumers are dependent on other organisms for food; and

B describe the flow of energy through food webs, beginning with the Sun, and predict how changes in the ecosystem affect the food web.

A explore how structures and functions enable organisms to survive in their environment;

B explore and describe examples of traits that are inherited from parents to offspring such as eye color and shapes of leaves and behaviors that are learned such as reading a book and a wolf pack teaching their pups to hunt effectively; and

C explore, illustrate, and compare life cycles in living organisms such as beetles, crickets, radishes, or lima beans.