Texas Essential Knowledge and Skills Teaching Resources

Science 5.5

Matter and energy. The student knows that matter has measurable physical properties and those properties determine how matter is classified, changed, and used. The student is expected to:

  • (1) classify matter based on measurable, testable, and observable physical properties, including mass, magnetism, physical state (solid, liquid, and gas), relative density (sinking and floating using water as a reference point), solubility in water, and the ability to conduct or insulate thermal energy or electric energy;
    • (A) demonstrate that some mixtures maintain physical properties of their ingredients such as iron filings and sand and sand and water; and
    • (B) identify changes that can occur in the physical properties of the ingredients of solutions such as dissolving salt in water or adding lemon juice to water.

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