Warm- Up/ Review Questions 02/01/2017 What are the four states of matter? Label the following as an element, compound or mixture Tin (Sn) Peanut Butter and Jelly Sandwich Silver Nitrate and Sodium Chloride are mixed to make a clear solution FeCl3

Physical Properties Physical Properties are properties that can be measured WITHOUT changing the substances’ state of matter Examples: Color of water with food coloring Tearing a Piece of paper in half Density, Conductivity, Malleability

Physical Change Physical Changes are any changes to a substance that still causes the substance to retain its original properties that it had before Examples: Melting, Boiling, Sublimation Good Time to show the phase triangle

Practice Determine which of the following represents a physical change/ physical property: a. The freezing of water to form ice cubes b. The cutting of wood

Chemical Properties Chemical Properties are the ability of different substances to undergo chemical reactions and form new substances Examples: The burning of wood Milk turning sour Leaves changing color in the fall

Chemical Changes A chemical change occurs when a substance undergoes a change in composition New substances are always formed during a chemical change Example: The combustion of Ethane (C2H6) with oxygen to form H2O and CO2

Chemical Changes Continued Chemical Changes usually require or release energy Evidences of a chemical reaction: a. Evolution of Light and Heat b. Production of a gas c. Formation of a solid

Practice Are the following items going through a chemical change or a physical change: Bleaching your hair Squeezing oranges for orange juice A plant turns sunlight, CO2, and water into sugar and oxygen Ice Cream melts in the sun

Physical or Chemical glass breaking a rusting bicycle melting butter for popcorn freezing chocolate-covered bananas burning toast cream being whipped burning leaves fireworks exploding

Warm Up 02/02/2017 Convert 75 miles per hour to meters per second Label following as physical or chemical change 1.Aluminum foil is cut in half 2.Jewelry tarnishes Water evaporates from the surface of ocean Milk goes sour

Density Density is the ratio of mass to volume Mathematically D = Mass / Volume Units for density include g/cm3, g/mL, or kg/m3

Density Continued Substances and their densities: Water 1 g/mL Table Sugar 1.59 g/mL Gold 19.3 g/mL Ice 0.917 g/mL Ethanol 0.789 g/mL Show Rainbow Density Column and coke and diet coke demo.

Density 1. What is the density of an object that has a mass of 5 g and a volume of 2.5 cm3 ? 2. What is the mass of an object with a density of 10 g/mL and a volume of 2 mL?