The main ideas we learned about this week in class had to do with pure elements, mixtures, and compounds, and the difference between them.  We learned the difference between atoms and molecules.  We also learned how to find the equation for water using a special devices.  We did an experiment using sugar, water, and ethanol.
     To learn what pure elements, mixtures, and compounds look like we did a worksheet in class called, Chemistry - Unit 4 Worksheet 1.  This worksheet had us separate and decide which groups were either mixtures or pure substances, and compounds or only elements.  We also had to decide which method of separation would work best for certain mixtures.  We then went over our answers in class to check and ask any questions if we had any.  We also worked on a packet called Classification of Matter.  This packet mainly focused atoms, particles and molecules.  We had to work as a group to come up with our own definition of the word "particle" and describe how a particle can be both a molecule and a single atom.  This packet also helped us to review certain aspects of atoms, like what holds them together and how to properly code an atom or molecule.  We also deciphered which chemical formulas were elements, compounds, and mixtures, similar to what we did in the previous worksheet.  The packet also went over chemical methods of separation and physical methods of separation.  After we finished the worksheet, each table white boarded out a problem and we checked our answers and asked questions if we had any.
     We did an experiment to find out how the equation for water was discovered.  This model was very interesting and I enjoyed seeing it in person because it helped me to visually see what happens, rather than reading and watching videos about it.
     As a class, we performed or witnessed, an experiment that involved dissolving a sugar cube in water and ethanol.  This experiment was to show how the chemical reaction between certain substances is different and also how they're density difference many have influenced the rate at which the sugar cube dissolved.  Then as table groups we drew out what we believed the particles of sugar, water, and ethanol looked like at a microscopic level.  We then went around and left comments on each tables board, leaving constructive criticism to help make their boards better next time.

       All of these activities relate because we started off with review which was then built upon to be demonstrated in real life situations, such as the dissolving sugar and witnessing how the equation for water is shown to be true.  However even in doing these worksheets and experiments/demonstrations, I still need to work on the difference between and molecule and a compound.  I get the two confused often because they contain atoms that are chemically bonded.  That is the main area I need to work on from this week, however besides that I feel that I have retained all information I have received this week.   Once I get that concept down, I will be great.