TEKS Standard 4.6A — 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). 4.6B — Investigate and compare a variety of mixtures, including solutions that are composed of liquids in liquids and solids in liquids. 4.6C — Demonstrate that matter is conserved when mixtures such as soil and water or oil and water are formed. 4.7A — 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. 4.8A — Investigate and identify the transfer of energy by objects in motion, waves in water, and sound. 4.8B — Identify conductors and insulators of thermal and electrical energy. 4.8C — Demonstrate and describe how electrical energy travels in a closed path that can produce light and thermal energy. 4.9A — Collect and analyze data to identify sequences and predict patterns of change in seasons such as change in temperature and length of daylight. 4.9B — Collect and analyze data to identify sequences and predict patterns of change in the observable appearance of the Moon from Earth. 4.10A — 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. 4.10B — Model and describe slow changes to Earth's surface caused by weathering, erosion, and deposition from water, wind, and ice. 4.10C — Differentiate between weather and climate. 4.11A — 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. 4.11B — Explain the critical role of energy resources to modern life and how conservation, disposal, and recycling of natural resources impact the environment. 4.11C — Determine the physical properties of rocks that allow Earth's natural resources to be stored there. 4.12A — Investigate and explain how most producers can make their own food using sunlight, water, and carbon dioxide through the cycling of matter. 4.12B — Describe the cycling of matter and flow of energy through food webs, including the roles of the Sun, producers, consumers, and decomposers. 4.12C — Identify and describe past environments based on fossil evidence, including common Texas fossils. 4.13A — Explore and explain how structures and functions of plants such as waxy leaves and deep roots enable them to survive in their environment. 4.13B — Differentiate between inherited and acquired physical traits of organisms.
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