Matter and energy. The student knows that matter has measurable physical properties that determine how matter is identified, classified, changed, and used.
Content
The student is expected to compare the properties of substances before and after they are combined into a solution and demonstrate that matter is conserved in solutions;
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Vertical TEKS Alignment
Matter and Energy - Types of Mixtures
4.6.B investigate and compare a variety of mixtures, including solutions that are composed of liquids in liquids and solids in liquids; and
4.6.C demonstrate that matter is conserved when mixtures such as soil and water or oil and water are formed.
5.6.B demonstrate and explain that some mixtures maintain physical properties of their substances such as iron filings and sand or sand and water;
6.6.B investigate the physical properties of matter to distinguish between pure substances, homogeneous mixtures (solutions), and heterogeneous mixtures;
7.6.D describe aqueous solutions in terms of solute and solvent, concentration, and dilution; and
7.6.E investigate and model how temperature, surface area, and agitation affect the rate of dissolution of solid solutes in aqueous solutions.
8.6.A explain by modeling how matter is classified as elements, compounds, homogeneous mixtures, or heterogeneous mixtures;
8.6.C investigate how mass is conserved in chemical reactions and relate conservation of mass to the rearrangement of atoms using chemical equations, including photosynthesis.
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