Reference no: EM132675475

Question 1. Your friend is having a hard time with the terminology in this unit. He is confused between the terms pure substances, mixtures, elements, compounds, homogeneous, and heterogeneous, as well as the difference between physical and chemical changes. Without just reciting the definitions, explain each term to your friend and provide at least two examples of each that will help him understand the concepts better.

Question 2. A metal cube is found in your lunchroom and you and your colleagues want to know what metal it is. Describe a process that could be used to determine what metal a metal cube is made up of. Remember that you have a table of common densities for metals in Lesson 2. Make sure to explain how and what measurements you will make (highlighting the importance of making measurements to the correct degree of certainty). Also include the mathematical process that you follow to carry out these experiments. Be sure to include proper units in your explanation.