Properties of Matter SC.8.P.8.2: Differentiate between weight and mass recognizing that weight is the amount of gravitational pull on an object and is distinct from, though proportional to, mass. SC.8.P.8.3: Explore and describe the densities of various materials through measurement of their masses and volumes. SC.8.P.8.4: Classify and compare substances on the basis of characteristic physical properties that can be demonstrated or measured; for example, density, thermal or electrical conductivity, solubility, magnetic properties, melting and boiling points, and know that these properties are independent of the amount of the sample. SC.8.P.9.2: Differentiate between physical changes and chemical changes.
Mass vs Weight Newton’s 2nd Law: F = M x A Mass: Amount of matter in a substance. Measured in GRAMS. Weight: Measure of the force of gravity on an object. Measured in NEWTONS. W=mg Newton’s 2nd Law: F = M x A
Properties of Matter: Density The amount of MATTER in a certain VOLUME. Independent of the amount of the sample size!!
Properties of Matter: Thermal/ Electrical Conductivity Conductor: allow for transfer through the free movement of electrons. Insulator: impede the free flow of electrons from atom to atom
Properties of Matter: Solubility The ability of a substance to dissolve into another substance. Solvent- liquid (VOLUME) Solute- solid Solution- combination of solvent and solute ↑temp = ↑RATE of reaction but still DOES NOT change mass
Properties of Matter: Magnetism
Properties of Matter: Melting/Boiling Point Independent of the amount of the sample.
Physical/Chemical Changes in Matter Physical Change – Changes the appearance of the substance; can get original substances back. Chemical Change – Changes the composition of the substance; cannot get original substances back.
Properties of Matter: pH
Law of Conservation of Mass (LCM) Mass is never created nor destroyed; only rearranged! FINITE! – All atoms formed in stars from lighter elements.
Carbon Cycle Carbon gets cycled between living and nonliving things.