Review Sheet Chapter 4 Section 1:___________________________________________________________ 1. What is Matter? 2. What are the three parts an atom and what are their charges? 3. What is the difference between mass and weight? 4. What is an element? Give three examples 5. What is the atomic number? 6. Explain what an energy level? 7. What is a compound and give an example? 8. What is the difference between a covalent and ionic bond? Section 2:_____________________________________________________________ 1. What is energy? 2. What are the three types of matter? Explain the volume and density of each? 3. Explain the difference between exergonic and endergonic reactions. 4. How are activation energy and a catalyst related/ Section 3:______________________________________________________________ 1. What is a solution? 2. Explain the role of the solute and solvent in a solution. 3. What is the universal solvent? 4. Explain the differences between acids and bases (taste, ions, place on ph scale). 5. What is a buffer? Chemistry Section 4:____________________________________________________________ 1. What is the difference between passive and active transport? 2. Define diffusion. 3. Diffusion across a membrane of molecules depends on what two things? 4. What is osmosis? 5. Explain the difference between hypertonic solutions, hypotonic solutions, and isotonic solutions. 6. What is the difference between endocytosis and exocytosis? Section 5:____________________________________________________________ 1. What are the four major organic molecules? 2. Why are the four major organic molecules each important to life functions? 3. Carbohydrates are made up of what? 4. Proteins are made up of what? 5. Give two examples of nucleic acids? 6. What is the difference between organic and inorganic molecules? 7. What is the boiling point and freezing point of water (Celsius and Fahrenheit) Section 6:__________________________________________________________ 1. How old is the earth? 2. Explain the Miller/ Urey Experiment.