• Scientific and engineering practices (1)
    • Ask questions and define problems based on observations or information from text, phenomena, models, or investigations.

    • Use scientific practices to plan and conduct descriptive investigations and use engineering practices to design solutions to problems.

    • Demonstrate safe practices and the use of safety equipment during classroom and field investigations as outlined in Texas Education Agency-approved safety standards.

    • Use tools, including hand lenses; metric rulers; Celsius thermometers; calculators; laser pointers; mirrors; digital scales; balances; graduated cylinders; beakers; hot plates; meter sticks; magnets; notebooks; timing devices; sieves; materials for building circuits; materials to support observation of habitats of organisms such as terrariums, aquariums, and collecting nets; and materials to support digital data collection such as computers, tablets, and cameras, to observe, measure, test, and analyze information.

    • Collect observations and measurements as evidence.

    • Construct appropriate graphic organizers used to collect data, including tables, bar graphs, line graphs, tree maps, concept maps, Venn diagrams, flow charts or sequence maps, and input-output tables that show cause and effect.

    • Develop and use models to represent phenomena, objects, and processes or design a prototype for a solution to a problem.

  • Scientific and engineering practices (2)
    • Identify advantages and limitations of models such as their size, scale, properties, and materials.

    • Analyze data by identifying any significant features, patterns, or sources of error.

    • Use mathematical calculations to compare patterns and relationships.

    • Evaluate a design or object using criteria.

  • Scientific and engineering practices (3)
    • Develop explanations and propose solutions supported by data and models.

    • Communicate explanations and solutions individually and collaboratively in a variety of settings and formats.

    • Listen actively to others' explanations to identify relevant evidence and engage respectfully in scientific discussion.

  • Scientific and engineering practices (4)
    • Explain how scientific discoveries and innovative solutions to problems impact science and society.

    • Research and explore resources such as museums, libraries, professional organizations, private companies, online platforms, and mentors employed in a science, technology, engineering, and mathematics (STEM) field to investigate STEM careers.

  • Recurring themes and concepts (5)
    • Identify and use patterns to explain scientific phenomena or to design solutions.

    • Identify and investigate cause-and-effect relationships to explain scientific phenomena or analyze problems.

    • Use scale, proportion, and quantity to describe, compare, or model different systems.

    • Examine and model the parts of a system and their interdependence in the function of the system.

    • Investigate how energy flows and matter cycles through systems and how matter is conserved.

    • Explain the relationship between the structure and function of objects, organisms, and systems.

    • Explain how factors or conditions impact stability and change in objects, organisms, and systems.

  • Matter and energy (6)
    • Classify and describe matter using observable physical properties, including temperature, mass, magnetism, relative density (the ability to sink or float in water), and physical state (solid, liquid, gas).

    • Investigate and compare a variety of mixtures, including solutions that are composed of liquids in liquids and solids in liquids.

    • Demonstrate that matter is conserved when mixtures such as soil and water or oil and water are formed.

  • Force, motion, and energy (7)
    • Plan and conduct descriptive investigations to explore the patterns of forces such as gravity, friction, or magnetism in contact or at a distance on an object.

  • Force, motion, and energy (8)
    • Investigate and identify the transfer of energy by objects in motion, waves in water, and sound.

    • Identify conductors and insulators of thermal and electrical energy.

    • Demonstrate and describe how electrical energy travels in a closed path that can produce light and thermal energy.

  • Earth and space (9)
    • Collect and analyze data to identify sequences and predict patterns of change in seasons such as change in temperature and length of daylight.

    • Collect and analyze data to identify sequences and predict patterns of change in the observable appearance of the Moon from Earth.

  • Earth and space (10)
    • 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.

    • Model and describe slow changes to Earth's surface caused by weathering, erosion, and deposition from water, wind, and ice.

    • Differentiate between weather and climate.

  • Earth and space (11)
    • Identify and explain advantages and disadvantages of using Earth's renewable and nonrenewable natural resources such as wind, water, sunlight, plants, animals, coal, oil, and natural gas.

    • Explain the critical role of energy resources to modern life and how conservation, disposal, and recycling of natural resources impact the environment.

    • Determine the physical properties of rocks that allow Earth's natural resources to be stored there.

  • Organisms and environments (12)
    • Investigate and explain how most producers can make their own food using sunlight, water, and carbon dioxide through the cycling of matter.

    • Describe the cycling of matter and flow of energy through food webs, including the roles of the Sun, producers, consumers, and decomposers.

    • Identify and describe past environments based on fossil evidence, including common Texas fossils.

  • Organisms and environments (13)
    • Explore and explain how structures and functions of plants such as waxy leaves and deep roots enable them to survive in their environment.

    • Differentiate between inherited and acquired physical traits of organisms.