Science 90 - Oct 30

Today we examined some of the common elements in nature and the properties they have.  Elements such as hydrogen, oxygen, carbon, sodium, chlorine.  This was covered on slides 37-42 in the notes powerpoint. Students were then given a periodic table as well as a worksheet labelled worksheet 3.  This will be due tomorrow along with the questions on slide 43.  See you all tomorrow for a very spooky Friday!!!

Physical Science 20 - Oct 30

Today students wrote their stoichiometry quiz.  They then followed it up with some more work with limiting reactants.  The handout that the sub gave today was just for more practice.  It is not due.  Tomorrow we will go over Assignment C25.  We will also look at percent yield tomorrow.

Physics 30 - Oct 30

Today we started looking at the force of friction and how it works.  We learned that friction only depends on the material that the surfaces in contact are made of as well as the normal force that the surface supplies to the object.  We learned about the difference between kinetic friction and static friction as well as how to calculate each value.  This was covered on slides 43-50.  We did a couple of examples as well but didn't quite get to assignment 3.5.  We will get there tomorrow.  On Halloween.  BWUhahahahaha (that sounded creepier in my head)

Science 90 - Oct 29

Today in class we went over the homework from yesterday after I checked it.  We then started to learn about the elements and how they are categorized.  This was covered on slides 33-36.  Tomorrow we will continue with a look at some of the common elements in nature.  There was no assignment with today's lesson.

Physical Science 20 - Oct 29

Today in class we learned some real world stoichiometry.  So far we have learned how to do stoichiometry under ideal situations.  Today we learned what a limiting reactant is.  A limiting reactant is a reactant in a chemical reaction that limits how much product you can make.  Problems that ask you to find the limiting reactant are no different than other stoichiometry problems but you usually have to do stoichiometry twice.  You are given a certain amount of each reactant, and you have to determine how much product will form.  To do that, you must to stoichiometry with each reactant and whichever yields the lower amount of product will be the limiting reactant.

The notes that we took today were on slides 16-24.  Students then had the rest of class to work on Assignment C25.  You will get more time tomorrow to work on this assignment, but you will also be writing a quiz on stoichiometry tomorrow.  This quiz is just going to cover ideal stoichiometry, or Assignment C24.

Physics 30 - Oct 29

Today we started to look at specific types of forces.  We began with an examination of the force of gravity.  This is also called an object's weight, although not to be confused with an object's mass.  The one lesson I wanted students to learn today is that mass and weight do not mean the same thing.  Mass is a measure of the amount of matter an object has whereas weight is the force of gravity on that object.  One is measured in kilograms, the other in newtons.

We learned about the differences between weight and the normal force and also learned what exactly a bathroom scale is measuring.  The concept of apparent weight is really important for students to understand.  This was all covered on slides 36 to 42.  Students were given some time to work on Assignment 3.4 at the end of class, which we will take up tomorrow.

The dates are also set for the first in class assignment in this unit as well as the quiz for Lab 2.1.  The in class assigned, which covers Assignments 3.1 to 3.4, will happen next Tuesday, Nov 4.  The quiz for Lab 2.1 will happen next Monday, Nov 3.

Science 90 - Oct 28

We got settled into our new classroom today and students learned about atomic theory and how it developed over time.  We also learned about the significance of scientific models and the difference between scientific theories and scientific laws.  These notes were covered on slides 23-31 in the chemistry notes powerpoint and then students had a chance to work on the homework given on slide 32.  It is quite a large assignment and will be checked tomorrow.  Make sure you have it done.

Tomorrow we will start looking at the elements and how they are categorized.  After going over the homework of course.