Homework:
 - Unit test 4 has been moved from Friday to Tuesday, January 24th. Review questions are online. You may answer these questions and use them on the test. Vocab is also posted but may not be used on the test. Readings have been posted and you may review these to help refresh your memory on our discussions.

Absent students:
Today we finished the chemical weathering lab. Please see your group members for data. Answer questions 1-5 on pages 3 and 4 after you get this data. Do not copy their answers to questions 1-5 (they can help you, but don't just copy their answers). It will help you understand the next topic in our unit. This doesn't have to be done tonight but must be done by the end of tomorrow.

Today in class we:
 - Viewed our rocks after sitting in acid for 24 hours
 - Discussed the lab results
 - Conducted an experiment to see how heat and surface area affect the time it takes something to weather.

Handouts:
You received one handout in class today:
 - Handout 86: Heat and Rate of Chemical Reactions Lab