1. Warm Up Week 9 10/15/13 pg. 54-55 What type of mixture is lemonade? Explain how you know. How are both compounds and elements considered pure substances? Would Oxygen gas (O 2 ) be considered a compound, mixture, molecule or atom? In what form of H 2 O are the particles moving the fastest??

2. 1.How do you know if 2 chemicals have chemically combined rather than just physically combined? 2.What do the particles of a liquid and solid have in common that is different than particles of a gas? 3.What is the difference between a mixture and a compound? 4.What is a heterogeneous mixture? What are some examples of heterogeneous mixtures? 5. What is a homogeneous mixture? Examples? Warm Up Week 9 10/16-17/13 pg. 54-55

3. Warm Up Week 9 10/18/13 pg. 54-55 What sign of a chemical change proves that a green copper penny has gone through a chemical change? What type of mixture is sugar water? How do you know? Which state of matter is the warmest? Coolest? What about the state of matter makes it warm or cold? Groups of two or more atoms of the same element bonded together (like H 2, and O 2 ) are called _______________.