1. Welcome Back to Week 3! I hope you had a great weekend and are ready for another fun-filled week in Chemistry! Please visit your folder in the back of the room, find your seat, and get prepared for the bell buzzer. Be sure to label your paper 3-1!

2. Bell Buzzer 3-1 1. (3 points) Using the given scenario, determine the IV, DV, and Control Groups. Dr. Imanut wants to examine whether a new drug increases the maze running performance of older rats. Just like aging humans, older rats show signs of poorer memory for new things. Dr. Imanut teaches two groups of older rats to find a piece of tasty rat chow in the maze. One group of rats is given the new drug while they are learning the maze. The second group is not given the new drug. One week after having learned the maze he retests the rats and records how long it takes them to find the rat chow. 2. (2 points) A report in the media states that a specific diet will protect individuals from cancer. However, no data are reported to support this statement. Is this statement a hypothesis or a conclusion? Explain why.

3. Vocabulary Words Week 3 GraphMotif Significant FigureBastion Percent ErrorEsoteric PrecisionIndubitable AccuracyCoterie Please copy the following vocabulary words and get to know them well for your vocabulary quiz on Friday. Remember: the words on the left are science words found in the reading assignments. The words on the right are PSAT words that can be found in your agenda for this week.

4. Monday’s Agenda 1.Metrics and Dimensional Analysis Lecture 2.Classwork Practice: Metric Conversion Practice I and II 3.H/O Metric Conversion Practice III 4.Honors: Be prepared for Science Fair Topic and Partner Sign-Up tomorrow. Also, please bring your logbook (composition notebook) to class with you. Thank you!