Presentation on theme: "Chapter 1 Notes The Properties of Matter. What is Matter? Matter is anything that has Mass and Volume Mass is the amount of matter an object contains."— Presentation transcript:
What is Matter? Matter is anything that has Mass and Volume Mass is the amount of matter an object contains. ◦ Units: grams (g), kilograms (kg) Volume is the amount of space an object takes up. ◦ Units: liquids: liters (L), milliliters (mL), Solids: cubic centimeters (cm 3 ) mL = cm 3
Vocabulary YOU need to know! Meniscus Read at the bottom of the meniscus!
Physical Properties Physical properties can be observed or measured without changing the identity of the matter. Examples: ◦ Color ◦ Odor ◦ Mass ◦ Volume ◦ Density (Density = Mass/Volume) ◦ State – Solid, Liquid, or Gas? ◦ Malleability – Can I flatten it? ◦ Ductility – Can I stretch it into a thin wire? ◦ Solubility – Can I dissolve it in something? ◦ Thermal Conductivity – Does it carry heat?
Chemical Properties Chemical properties describe a substance’s ability to change into a new, different substance with different properties. Examples: ◦ Flammability – Does it burn? ◦ Reactivity – Does it react when mixed with some other substance to make a new substance?
Characteristic Properties Characteristic properties are always the same, whether the object is large or small. Characteristic properties can be physical or chemical. Examples:Examples that are NOT: ◦ Density ᵒ Size ◦ Solubility ᵒ Volume ◦ Reactivity ᵒ Shape ◦ Boiling Point ᵒ State of Matter
Physical Changes In a physical change, a physical property changes, but the identity of the substance does not change. Physical changes are sometimes easy to undo Examples: ◦ Melting ice or boiling water ◦ Ripping paper into pieces ◦ Dissolving sugar into water
Chemical Changes In a chemical change, a substance changes into a different substance. Chemical changes are usually difficult to undo. Examples: ◦ Burning wood or “snakes” ◦ Spoiling milk (curdling) ◦ Rusting metal ◦ Baking a cake
Evidence of a chemical change Change in color (unexpected) Unexpected change in temperature Endothermic – heat is absorbed. (feels cooler) Exothermic – heat is released. (feels hotter) Gas produced (bubbles appear, foaming) Odor produced (smells) A solid forms (precipate) when two liquids are mixed Electricity is generated Light is produced Fire is produced