Presentation on theme: "SECTION I: DEFINING MATTER. Chemistry is the study of the composition, structure and properties of matter, the processes that matter undergoes and the."— Presentation transcript:
Mass is the amount of matter in an object Mass is constant and does not change with location. Mass is also the measure of inertia Inertia is the resistance of an object to changes in its motion The more mass the greater the inertia
While mass deals with how much matter is present, weight takes into account the force of gravity. Underwater and in space objects weight less than they do on earth but their mass is the same regardless of location. Therefore, on Earth mass and weight represent the same thing.
Extensive Properties-a characteristic that is specific to the amount of matter. In other words, the property changes with the amount of the substance. Ex. Mass, volume, weight, & length are extensive properties. Extensive properties alone are not sufficient in identifying a substance.
Density- the amount of substance or mass contained in a certain space. The mass per unit volume. Density is useful in identifying the composition of a substance. Temperature alters the density of a substance
Density = mass/volume Common Units of Density = g/mL, g/cm 3
The density of water at room temperature is 1.0g/mL. Any object with a density greater than 1.0g/mL will sink in water. Any object with a density less than 1.0g/mL will float in water.
Intensive Properties-a characteristic that does not depend on the size or amount of matter. In other words, the property remains constant regardless of the amount of the substance. Ex. Density, color, hardness, boiling point, melting point, etc. Intensive properties are useful in identifying a substance.