Catalyst – February 8(2)+2, 2013WELCOME BACK! Week #6

Monday Mystery Element!Shhhh!

1.Has ten natural isotopes2.Symbol from Latin stannum3.Identified and used in ancient times

Tin has 10 natural isotopes!

Today’s Agenda

Catalyst and New Groups + LAB FEES! Unit 2 Tracking, Big Goals, Personal Mottos Welcome to Unit 3: Your Best Friends in

Chemistry and New Groups Anticipation Guide and Theory Article Unit Vocabulary Exit Question

HW: Workbook Pages 45-46Complete Vocab Words!!!

Front DoorProjector1st Period

Group 3

Manuel, Monique, Quanisha, Andrew

Group 2

Lindsey, Darren, Chaz, Denise

Group 1

Jada, Wesley, Erica, Darnell

Group 6

Shelby, Briana, A’lexis, Shawn

Group 4

Kara, Jerry, DaJa, Luis

Group 9

No students

Group 8

Myra, Michael, Aislinn

Group 7

Diante, Darius, Gabby

Group 5

Rebecca, Chris, A’Keelah

Front DoorProjector2nd Period

Group 3

Brittney, Unique, Brian, Dustin

Group 2

Jalyn, Stephanie, Zach, TraMichael

Group 1

Kennedy, Kalyn, Branger, Destinee

Group 6

Lawuan, Markel, Mariah, Diamond

Group 4

Shay, Kelsey, Keyouna, Coty

Group 9

No students

Group 8 Group 7

Group 5

Courtney, Kayla, Chris, Kyndel

Front DoorProjector4th Period

Group 3

Balen, Ashley L., Deante, Joe

Group 2

Brooke, Kamaria, Johnny, Blanca

Group 1

Jasmine, Maya, Aldren, Peyton

Group 6

Kelly, Briana, James, Eric

Group 4

Realitee, Anh, Stephen, Amber

Group 9 Group 8

Abby, Ashley B., Jemaria, Tiara

Group 7

Zavonte, David, Shyann, Shae

Group 5

Tiffany, Berta, Kristian, Mishael

Today’s Objectives

SWBAT track their Unit 2 GLE Mastery.

SWBAT re-motivate themselves to become LEGEN…..DARY!

SWBAT describe and differentiate between conclusions, theories, laws, and models.

Unit 2 Test GLE Mastery Averages

1st Period: 75.0%2nd Period: 77.3%4th Period: 81.7%

Unit 2 Test Masters

1st Place: Kayla Williams (108!)

2nd Place: Brian James (98)

3rd Place: Branger Hernandez (97)

2nd Period Represent!

CD

FA

B

GLE MASTERY AVERAGE:75.0%

C

D

FGLE MASTERY AVERAGE:77.3%

GLE Masters (80% or higher)1st Period• Chris• Akara• Wesley• Diante• Briana • Aislinn• A’Lexis• Darren• Shelby• Andrew

2nd Period• Zac• Coty• Keyouna• Branger• Brian• Lawuan• TraMichael• Kennedy• Kayla

GLE Runners-Up (70-79.9%)

• DaJa• A’Keelah• Lindsey• Manuel• Myra• Denise• Rebecca• Jerry

• Mariah• Diamond• Kelsey• Stephanie• De’Shane• Brittney

• Courtney• Jalyn• Chris• Destinee• Markel

1st Period 2nd Period

GLE MASTERY AVERAGE:81.7% F

D A

BC

GLE Masters (85% or higher)

• Kristian• Ashley Bran• Briana• Balen• Kamaria• Tiff• Zavonte• Anh

• Kelly• Shae• Realitee• Blanca• Deante• Abby• Aldren• Peyton

GLE Runners-Up (80-84.9%)

• Brooke• Amber• Johnny• Jasmine• Jemaria

Resume!Unit 2 Test GLE Mastery Tracking

• Please fill out resume completely• Determine the number of points you got

correct in order to calculate % mastery for each GLE

• Pay attention to the questions listed for each GLE!

Unit 3: Your BEST FRIENDS in Chemistry:Atoms and the Periodic Table

LESSON TITLE:CONCLUSIONS,

THEORIES, LAWS, AND MODELS

Anticipation Guide (10-15 min) Before reading the entire article, mark if

you agree or disagree with each. After reading the entire article, fill in the

paragraph number where you found the answer to each statement.

Reflection: Were you correct or not? What did you learn?

Reminder! Conclusions

Key Point #1: A conclusion is a judgment based on data from a scientific experiment.

What is a scientific law?

Key Point #2: A scientific law is a concise (short) statement that summarizes the results of many observations and experiments. Laws are NOT long explanations That is what theories are for!

What is a scientific theory?

Key Point #3: A scientific theory is a well-tested explanation for a broad set of observations. Higher level than hypothesis (many tests needed to support a theory)

Can be or may need to be changed in the future

From HowStuffWorks.com

WHAT IS A THEORY?In science, a theory is an attempt to explain

a particular aspect of the universe. Theories can't be proven, but they can be disproven. If observations and tests support a theory, it becomes stronger and usually more scientists will accept it. If the evidence contradicts the theory, scientists must either discard the theory or revise it in light of the new evidence.

How is a THEORY different from a CONCLUSION or HYPOTHESIS?

THEORYExplanation supported by many, many experiments

MORE THANONE SCIENTISTTakes time!

Acceptance of Scientific DiscoveryThe Long Version

Use the following rules of evidence to examine experimental results:A. Can an expert's technique or theory be tested, has it been

tested, or is it simply a subjective, conclusive approach that cannot be reasonably assessed for reliability?

B. Has the technique or theory been subjected to peer review and publication?

C. What is the known or potential rate of error of the technique or theory when applied?

D. Were standards and controls applied and maintained?E. Has the technique or theory been generally accepted in

the scientific community?

Acceptance of Scientific Discovery“Cliff’s Notes” Use the following rules of evidence to examine experimental

results:

A.Has it been adequately tested?B.Has peer review occurred?C.What kind of error does it have?D.Were there standards or control

groups?E.Has it been accepted by scientific

community?

F = ma

What is a scientific model?

Key Point #4: A scientific model is a simplified description of something that happens in nature (or technology), and it can be used to make predictions.

Vocabulary Look-Up!

1. Theory2. Scientific law3. Atom4. Isotope5. Atomic

number6. Mass number

7. Atomic mass8. Protons9. Neutrons10. Electrons11. Cathode ray12. Nucleus

Exit Question

1. Describe either a scientific conclusion OR a scientific model.

2. What is one difference between a theory and a law?

HW: Complete Workbook Pages 45-46

+ Complete Vocabulary!

Exit Question

1. Describe either a scientific conclusion OR a scientific model.

2. What is one difference between a theory and a law?Honors HW: Workbook Pages

44-46+ Study Vocabulary