Integrated Science II

Students continued work on the Collision WebQuest (see 12-06-10). We discussed the role of a catalyst in a chemical reaction.

Discussion of activation energy and enthalpy. Smartboard notes 12-01-10. Quiz on Friday on the mole and balancing chemical reactions (open lab notebook).

Students investigated how the concentration of a reactant affected the rate of a chemical reaction. Smartboard notes 11-10-10 should be in science lab book. What is the molecule below? What element does each color represent?

Time=60 sec. Note color changing.

Iodine and Acetone (together) t=0 sec

Students collected data from a clock reaction where the temperature of the reactants was changed. Each class did slightly different temperatures (room temperature, one colder and one warmer). Notes that can apply to all classes Smartboard notes 11-09-10.

Models of Acetone and Iodine

Solutions of Iodine and Acetone

Students set up Data Table and Graph for demo lab tomorrow. A question was posed and a group hypothesis was discussed. Smartboard 11-08-10

Open notebook quiz is tomorrow. Students will find it helpful to update their Table of Contents. Today we continued with the BBs in the petri dishes to model collisions on an atomic level.

Exams were returned from last Friday and students were reminded of the science notebook quiz on Wed 11-03-10. Students began to model atomic collisions by using a petri dish that contained two differently sized BBs and worked with the questions on pp. 114-116 in the text. How would you describe the velocity of the smaller mass BBs compared to the larger mass BBs when the dish was shaken? Can velocity change if only direction changes? Can momentum change if only the direction of a particle changes? Shaking the dish faster simulates higher energy (for instance raising the temperature of a substance). What does this do to the number of collisions?

First Quarter Exam. Next week we begin to look at collisions on the atomic level.

We discussed head on collisions as they relate to sports and injuries. You really should watch this video (12 min) about traumatic brain injury as well as the one below.

As a follow up to the lab activity, students worked with this Hit and Stick Collision activity. Calculations and results should be placed in a spreadsheet that comes with the activity. The concept of momentum was introduced. Click on the ClustrMap. Someone from the Caribbean checked out our site!