Ms. Cotta's Chemistry Class

Friday, October 9, 2015

HW #1 for 10/12

1) HW #1 pg. 31 exer. 2.1, pg. 34 exer. 2.2 (yellow boxes), pg. 34 #1-4
2) Take Home Lab #2 due 10/19
3) Health Fair at West Adams on 10/10 from 10am-1pm for extra credit with stamped passport

Wednesday, October 7, 2015

1) HW #10 pg. 90 #57-58, pg. 91 #1, 4-6, 9
2) Chapter 2 & 3 test tomorrow, study guide online
3) All late HW due tomorrow after that it is a zero
4) Composition books due for Period 1, 2 & 3 on Friday
5) Take Home Lab #1 due Friday

Tuesday, October 6, 2015

Study Guide for Chapter 2 & 3 Test

Chapter 2:
--Be able to explain what is an element, compound, and mixture is and what is the difference between them
--Be able to identify an element, compound or mixture based on what they are composed of
--Know the difference between a heterogeneous and homogeneous mixture and be able to identify each
--Be able to explain how to separate a mixture such as we did in class

Chapter 3:
--Identify elements on the periodic table and give their protons, electrons, neutrons, atomic number and atomic mass, group #, period #, family name, what elements are similar and be able to draw a model of an atom
--Be able to count the number of atoms of each element in a compound such as Ca(NO3)2
--Know all the different groups of the periodic table
--Know the parts of the atoms and their properties such as mass, charge and location
--Be able to explain which elements on the periodic table are similar
--Use the periodic table to identify elements and their properties and groups
--Know which direction are groups and periods and what they represent

Research opportunities

Earthwatch is a 10-14 day trip to do actual science research in the field. All expenses are paid, but only available for sophomore and junior students. By end of October request for information is due and then application is due in middle of December. Application requires short written responses and 2 teacher recommendations.

http://earthwatch.org/education/student-fellowships/ignite

PBS sponsors a chance for 100 students to conduct their own cancer research in conjunction with a scientist for a 2-3 month project. All expenses are paid for the research plus a laptop computer for research. Applications are due November 1st and require a 750 word essay.

https://pbslearningmedia.formstack.com/forms/emperorscienceaward_form

Monday, October 5, 2015

HW #9 for 10/6

1) HW #9: pg. 71 exercise 3.5 (yellow box), pg. 90 #53-54, 56, 59
2) Test on Thursday on Chapter 2 & 3
3) All late HW #1-10 due Thursday
4) Composition books due--Period 1 & 2 on Friday

Friday, October 2, 2015

Alien Periodic Table

Procedure:

**Create a periodic table of elements that has 8 groups and 5 periods. The group aliens must be exactly the same in ONE way (the Key Similarity) and must also share one feature that changes in a periodic pattern as you move down the group (the Varying Trait). Within each period, the aliens must be exactly the same in ONE way (the Key Similarity) and must also share one feature that changes in a periodic pattern as you move across the period (the Varying Trait).

**Two aliens are missing from your set, leave empty spaces to draw them in later.

Questions:

1. How many groups of aliens do you have? ________

How many periods of aliens do you have? ________

2. Draw in the missing aliens and describe. Group ______ Period ____

Description of missing alien #1 Drawing of missing alien #1

(Give 5 characteristics of the alien)

1.__________________________

2. __________________________

3. __________________________

4. __________________________

5. __________________________

Description of missing alien #2 Drawing of missing alien #2

Group ______ Period ____

(Give 5 characteristics of the alien)

1.__________________________

2. __________________________

3. __________________________

4. __________________________

5. __________________________

3. Give detailed information about your chart of aliens. Then list the Key Similarity and Varying Trait for the aliens in that group. Be very specific about what is staying the same and changing.

Key Similarity (stays same) Varying Trait (changes)

Group 1 _____________________ _________________

Group 2 _____________________ _________________

Group 3 _____________________ _________________

Group 4 _____________________ _________________

Group 5 _____________________ _________________

Group 6 _____________________ _________________

Group 7 _____________________ _________________

Group 8 _____________________ _________________

Period 1 _____________________ __________________

Period 2 _____________________ __________________

Period 3 _____________________ __________________

Period 4 _____________________ __________________

Period 5 _____________________ __________________

4. The ‘Next’ Alien? For one group and one period…

Group number: _____

Period number: _____

A) Describe what the ‘next’ alien might look like

B) Draw neatly what it might look like

The ‘next’ alien almost certainly has… Drawing of ‘next’ alien

__________________________________

Thing about the ‘next’ alien we really don’t know is

________________________________________

Analyzing and Comparing Questions:

5. What do the groups of aliens have in common (how are they similar) to the groups/families of atoms on periodic table? Think about how the groups on the periodic table are similar and compare to your aliens.

6. How are the periods of the aliens in common to the periods on the periodic table? What similarities do they have?

7. Compare the alien in group 1, period 1 to the atom in group 1, period 1 (hydrogen) on the periodic table. How are they similar; compare their characteristics. Think about what are the characteristics of the hydrogen atom.

HW #8 for 10/5

1) HW #8 pg. 75 #1-7, pg. 88 #32-42
2) Take Home Lab due Friday October 10th, this your last weekend to work on it! A copy of the lab is posted on the website.