Warm Up: copy the homework assignment on a separate sheet of paper Date Session # Activity Page 8/30-31 1 Chemistry Unit Page EOG need to know A Matter of Evidence Ink Article Understanding Gold Karat 2 A Matter of Evidence Lab Results 3 Homework: Chemistry Unit Cover Page (pg 1) Current event related to our science content: Chemistry, Water distribution/quality, Earth’s history, Biotechnology, Disease. You must have read the article, write a brief summary (~ 3 sentences) so your are able to discuss with classmates. This can be a written article, graph, data table keyed map.

Notebook Set up:. Inside the cover: your name, my name, block Notebook Set up: Inside the cover: your name, my name, block Unit page/collage Table of Contents next pages 3, front & back Date Session # Activity Page 8/30-31 1 Chemistry Unit Page EOG need to know A Matter of Evidence Ink Article Understanding Gold Karat 2 A Matter of Evidence Lab Results 3

Stump the Teacher Keep a list of the strategies I use when reading

TLW closely read various texts, including chromatography lab results, to determine the definition of a pure substance. EQ Ink is not a pure substance. Using evidence from the texts, explain what chemists might mean when they use the term “pure substance.”

A Matter of Ink Evidence lab 8.P.1 Understand the properties of matter and changes that occur when matter interacts in an open and closed container. 8.P.1.1 Classify matter as elements, compounds, or mixtures based on how the atoms are packed together in arrangements. What is a pure substance? Non-science words in the standard you don’t know..add to the class word wall. Just looking at the standard, what are the different classifications of matter? Then why am I asking you about a pure substance? conversation with table

A MATTER OF EVIDENCE LAB RESULTS p3 A MATTER OF EVIDENCE LAB RESULTS outside your mind… inside your mind! share out observation…walk about. Leave your observations on your table , walk around and read others’, if you read something you also observed but did not record, go back and add it to your paper.

p1 A Matter of Ink Evidence Evidence from handwritten notes has been a hallmark of crime detection for a long time--but forensic technology has just made the process that much more sophisticated. That's good news for investigators of insurance fraud, currency counterfeiting, tax evasion, and insider trading violations. Just consider a recent case involving the ink of a particular entry on a stock worksheet that was tested against the rest of the document's ink. Differences in the samples suggested that the questioned entry was made on a separate occasion, possibly to cover insider-trading violations. Introduction: Chromatography is a method for analyzing mixtures by separating them into the components from which they are made. It can be used to separate mixtures like ink, blood, gasoline, and lipstick. In ink chromatography, you are separating the colored pigments that make up the color of the pen. Even though a pen will only write in one color, the ink is actually made from a mixture of different colored pigments. To perform ink chromatography, you put a small dot of ink to be separated at one end of a strip of paper. This end of the paper strip is then placed in a solvent. The solvent moves up the paper strip; and, as it travels upward it dissolves the mixture of chemicals and pulls them up the paper. The chemicals that dissolve best in the solvent will move up the paper strip further than chemicals that do not dissolve as well. What is produced from this method is a chromatogram. Scan through the first 2 paragraphs, Circle or highlight words you don’t know, or are being used in an unfamiliar way.

p1 A Matter of Ink Evidence Evidence from handwritten notes has been a hallmark of crime detection for a long time--but forensic technology has just made the process that much more sophisticated. That's good news for investigators of insurance fraud, currency counterfeiting, tax evasion, and insider trading violations. Just consider a recent case involving the ink of a particular entry on a stock worksheet that was tested against the rest of the document's ink. Differences in the samples suggested that the questioned entry was made on a separate occasion, possibly to cover insider-trading violations. Introduction: Chromatography is a method for analyzing mixtures by separating them into the components from which they are made. It can be used to separate mixtures like ink, blood, gasoline, and lipstick. In ink chromatography, you are separating the colored pigments that make up the color of the pen. Even though a pen will only write in one color, the ink is actually made from a mixture of different colored pigments. To perform ink chromatography, you put a small dot of ink to be separated at one end of a strip of paper. This end of the paper strip is then placed in a solvent. The solvent moves up the paper strip; and, as it travels upward it dissolves the mixture of chemicals and pulls them up the paper. The chemicals that dissolve best in the solvent will move up the paper strip further than chemicals that do not dissolve as well. What is produced from this method is a chromatogram. Annotate your text along with me as I “think aloud.” Pay attention to reading strategies I use.

Scan through the next 2 paragraphs, Introduction: Chromatography is a method for analyzing mixtures by separating them into the components from which they are made. It can be used to separate mixtures like ink, blood, gasoline, and lipstick. In ink chromatography, you are separating the colored pigments that make up the color of the pen. Even though a pen will only write in one color, the ink is actually made from a mixture of different colored pigments. To perform ink chromatography, you put a small dot of ink to be separated at one end of a strip of paper. This end of the paper strip is then placed in a solvent. The solvent moves up the paper strip; and, as it travels upward it dissolves the mixture of chemicals and pulls them up the paper. The chemicals that dissolve best in the solvent will move up the paper strip further than chemicals that do not dissolve as well. What is produced from this method is a chromatogram. Scan through the next 2 paragraphs, Circle or highlight words you don’t know, or are being used in an unfamiliar way. What reading strategies did you observe?

Annotate your text along with me as I “think aloud.” Introduction: Chromatography is a method for analyzing mixtures by separating them into the components from which they are made. It can be used to separate mixtures like ink, blood, gasoline, and lipstick. In ink chromatography, you are separating the colored pigments that make up the color of the pen. Even though a pen will only write in one color, the ink is actually made from a mixture of different colored pigments. To perform ink chromatography, you put a small dot of ink to be separated at one end of a strip of paper. This end of the paper strip is then placed in a solvent. The solvent moves up the paper strip; and, as it travels upward it dissolves the mixture of chemicals and pulls them up the paper. The chemicals that dissolve best in the solvent will move up the paper strip further than chemicals that do not dissolve as well. What is produced from this method is a chromatogram. Annotate your text along with me as I “think aloud.” Stance: What surprised me? What reading strategies did you observe? What class of matter is ink? ECM. How do you know, cite evidence from the lab that supports your response.

How is the first diagram related to the second diagram? p2 Read and annotate these two texts from the stance: What Surprised Me? Read again: How is the first diagram related to the second diagram? What is a pure substance? Which would you rather have: pure gold or 10K, 14K gold? What is pure gold? What makes 14K gold impure? Why do you think we have different types when making jewelry?

Answer the essential question Ink is not a pure substance. Using evidence from the texts (explain what chemists might mean when they use the term “pure substance.”