1. Chemical Changes October 7, 2013 Ms. Smith Mrs. Malone Ms. Cedillo DO NOW: Date: October 7, 2013 TEKS: (Yes, write the WHOLE thing!) 6.5 D identify the formation of a new substance by using the evidence of a possible chemical change such as production of a gas, change in temperature, production of a precipitate, or color change. 1.Pick up a new gold Do Now sheet 2.Put your CB on your desk 3.Copy down this week’s TEKS 5. Q?: What is a substance that cannot be broken down into a simpler form by ordinary chemical means?

2. Homework: Chemistry in the Kitchen – due Friday! Get it signed by parent/guardian! Homework: Chemistry in the Kitchen – due Friday! Get it signed by parent/guardian! Announcements: Announcements: – Tutorials Monday – Science Olympiad meets Tuesday

3. Today’s To-Do List 1.Finish Periodic Table Tile – Use computer to finish research – Have your tablemates check your spelling – Use the rubric to make sure you have all parts – Flair! Color! Eye-catching! Neat! Complete! 2.Check your CB to make sure you have completed your Museum Brochure for The Elements of a Display 3.STEMscopes vocabulary and review games online

4. Giant Periodic Table Project You will be assigned an element to research ohenryscience6.weebly.com Use approved websites on ohenryscience6.weebly.com Click on Handouts for links Metals on blue paper Metals on blue paper Nonmetals on yellow paper Nonmetals on yellow paper Metalloids on green paper Metalloids on green paper Items that must be on your poster: 1.Name of the element 2.Element’s chemical symbol 3.Where is the element found in nature (Atmosphere? Crust?) 4.How humans get this element (example: mining) 5.How this element is used 6.Whether the element is a metal, non-metal, or metalloid 7.When was element discovered 8.Who discovered this element and 2 facts about the scientist (Discovered centuries ago? No scientist credited? Write 2 fun facts about the element! 9.Illustrations! (Drawings, pictures, or photographs of the element or things it makes up) Your paper should be this way

5. STEMscopes 1.Visit www.ohenryscience6.weebly.com and click on handouts www.ohenryscience6.weebly.com 2.Click the link to sign in to STEMscopes 3.Username: ASmith Password: science 4.Review the Picture Vocabulary and then check out the vocabulary and review games! Have you mastered your metals, nonmetals and metalloids vocabulary? Are you an element expert?

6. Chemical Changes October 7, 2014 DO NOW: Date: October 7, 2014 6.5 D identify the formation of a new substance by using the evidence of a possible chemical change such as production of a gas, change in temperature, production of a precipitate, or color change. 1.Put your CB on your desk 2.Title a new page “Chemical Changes Notes” 6. Q?: What is a mixture? Draw an example of a mixture with an element and a compound.

7. Page 25 due Friday Page 25 due Friday

8. Chemical Changes October 8, 2013 : Chemical changes occur when matter has changed into a new substance through a chemical reaction.  color change  bubbling and fizzing (gas)  light production  smoke  presence of heat or cold  solid precipitate Ms. Smith Mrs. Malone Ms. Cedillo

9. Powder Particulars Lab October 8, 2013 : Next new page of Comp Book Title: “Powder Particulars” Hypothesis: I predict… Materials: dropper bottle of vinegar, dropper bottle of water, micro chem plate1 ml scoops of baking soda and baking powder Procedures: 1.How are these powders similar and different? 2.Add three drops of water into the baking soda. Add three drops of water in to the baking powder. Record your observations 3.Add three drops of vinegar into the baking soda. Add three drops of vinegar into the baking powder. Record your observations. Observations: Baking SodaBaking Powder Ms. Smith Mrs. Malone Ms. Cedillo

10. Powder Particulars Lab October 8, 2013 : Analysis Questions: 1.What does the baking soda do when vinegar is added? 2.What does the baking powder do when vinegar is added? 3.How were the reactions alike? 4.How were the reactions different? Conclusion: In paragraph form complete a lab conclusion. Use page _____ in your CB to complete this assignment. Ms. Smith Mrs. Malone Ms. Cedillo

11. Powder Particulars Lab October 8, 2013 : Watch this! You added an acid to your powders to see how their chemical properties could help you tell them apart. I will add a pH indicator called “Universal Indicator” to two identical looking powders. Universal Indicator changes color depending on the pH of the substance it touches. pH tells you how acidic or basic something is. Do I have two identical powders or two different powders? How can you tell? Ms. Smith Mrs. Malone Ms. Cedillo

12. Chemical Changes Oct 9-10, 2013 DO NOW: Date: October 9-10, 2013 6.5 D identify the formation of a new substance by using the evidence of a possible chemical change such as production of a gas, change in temperature, production of a precipitate, or color change. Put your Comp Book (CB) on your desk Q?: What are the signs that a chemical reaction has occurred (use your TEK or notes for help). Ms. Smith Mrs. Malone Ms. Cedillo

13. Homework: Chemistry in the Kitchen – due Friday! Get it signed by parent/guardian! Homework: Chemistry in the Kitchen – due Friday! Get it signed by parent/guardian! Announcements: Announcements: – Science Olympiad meets on Mondays – Vocab quiz Friday

14. Demonstration Copper (II) Sulfate Ammonia Copper (II) Sulfate + Ammonia Did a chemical reaction occur? Did a chemical reaction occur? What was the sign of a chemical change? What was the sign of a chemical change?

15. Chemical Changes October 9-10, 2013 : Chemical changes - matter has changed into a new substance through a chemical reaction.  color change  formation of a gas  light production  smoke  presence of heat Ms. Smith Mrs. Malone Ms. Cedillo

16. Group Member Roles : Green - Materials Manager Only person allowed out of seat during lab Obtains and returns all lab materials Yellow – Safety/Clean-up Manager Enforces all safety rules (Goggles!!) Blue - Activity Director Reads directions to the group Keeps group on-task Red - Data Manager Records all data Ensures all group members have lab data

17. 1.Formation of a gas  When you mixed baking soda or baking powder and vinegar, the bubbles you saw were CO 2 gas.  Can you think of any examples of bubbling that do not create a new substance? Evidence of a chemical change.

18. 2. Color Change ◦ Color is a property of how the molecule is arranged. If there is a change to the molecule, the color can change. ◦ Color change doesn’t always mean that a chemical change occurred. ◦ Can you think of any examples of a substance changing color that does not create a new substance? Chemical Change

19. 3.Temperature Change hot (exothermic) cold (endothermic The substance can get hot (exothermic) or cold (endothermic), depending on whether the molecules give energy while swapping places (warmer), or need energy to swap (cooler). Temperature change doesn’t always mean that a chemical change occurred.  Can you think of any examples of a substance getting warmer or colder that do not create a new substance? Chemical Change

20. 4.Formation of a Precipitate A precipitate forms when a substance comes out of solution, and forms a solid. Formation of a precipitate doesn’t always mean that a chemical change occurred. Can you think of any examples of solids forming in a liquid that do not create a new substance? Chemical Change

21. A chemical change occurs when universal indicator is added to acids and bases – Universal indicator is an indicator, because it contains molecules that change color when an acid or base is added to them. Compare your samples to the key. Universal Indicator

22. Group Member Roles Oct 10-11, 2012 : Blue - Materials Manager only person allowed out of seat during lab obtains and returns all lab materials Green - Safety/Clean-up Manager enforces all safety rules, goggles Red- Activity Director reads directions to the group keeps group on-task Yellow - Data Manager records all data ensures all group has lab data Ms. Smith Mrs. Malone Ms. Cedillo

23. Mystery Powders Steps for Success Each powder has its own numbered column. Use the index cards to keep the powders separated when adding to the wells Each powder has its own numbered column. Use the index cards to keep the powders separated when adding to the wells Describe all 6 powders BEFORE reacting (color, texture, state of matter) Describe all 6 powders BEFORE reacting (color, texture, state of matter) Describe all 4 liquids BEFORE reacting (color, smell, state of matter) Describe all 4 liquids BEFORE reacting (color, smell, state of matter) Add all 24 powders BEFORE reacting any chemicals Add all 24 powders BEFORE reacting any chemicals GOGGLES ON AT ALL TIMES. MICROCHEMISTRY PLATES WILL SPLASH WHEN RINSED! GOGGLES ON AT ALL TIMES. MICROCHEMISTRY PLATES WILL SPLASH WHEN RINSED!

24. Mystery Powders Analysis and Conclusion Fill in your data table – no blanks! Write “No reaction” if there was no reaction Fill in your data table – no blanks! Write “No reaction” if there was no reaction Answer the analysis questions with your group and support your answers with your data Answer the analysis questions with your group and support your answers with your data Write a conclusion for Mystery Powders using Page 4 Lab Resources – Lab Conclusion Guide from your interactive notebook (comp book). You will need to continue onto the back of your lab report paper Write a conclusion for Mystery Powders using Page 4 Lab Resources – Lab Conclusion Guide from your interactive notebook (comp book). You will need to continue onto the back of your lab report paper TURN IN YOUR LAB REPORT PAPER TURN IN YOUR LAB REPORT PAPER

25. A chemical change occurred when universal indicator was added to cream of tartar and laundry detergent. – Universal indicator is an indicator, because it contains molecules that change color when an acid or base is added to them. – Cream of tartar is an acid, so it gave particles to the indicator, making it turn from purple to red. – Laundry detergent is a base, so it took particles from the indicator, making it turn from red back to purple. Chemical Change

26. Is It a Chemical Change? Whiteboard Review Write YES if the example shows signs of a chemical change Write YES if the example shows signs of a chemical change Write the sign(s) that prove that the example is a chemical change Write the sign(s) that prove that the example is a chemical change Write NO if the example if not a chemical change Write NO if the example if not a chemical change Explain why it is a physical change and not a chemical change Explain why it is a physical change and not a chemical change

27. A forest fire destroys acres of land. There is a lot of smoke, and the trees turn to charcoal. ANSWER: YES EVIDENCE: - Smoke, - color change, - temperature change Is it a chemical change?

28. When making hot cocoa, clear water turns brown when you mix the cocoa in. ANSWER: No (the water is turning brown because the cocoa is brown) Is it a chemical change?

29. An old wheelbarrow is left out in the rain and rusts. ANSWER: Yes EVIDENCE: Color change, precipitate forming (rust) Is it a chemical change?

30. On a hot day, water forms on the outside of a cold glass of water. ANSWER: No (No new substance is forming) Is it a chemical change?

31. Ice cream melts after it falls on the ground. ANSWER: No (No new substance is forming) Is it a chemical change?

32. A raw egg gets cooked. ANSWER: Yes EVIDENCE: Color change Is it a chemical change?

33. When Alka Seltzer is dropped into water it fizzes. ANSWER: Yes EVIDENCE: gas formation Is it a chemical change?

34. Crayons change white paper to red. ANSWER: No (The paper is turning red because the crayon is red.) Is it a chemical change?

35. Soda fizzes, and bubbles rise as you pour it in a glass. ANSWER: No (The bubbles were already there, just under pressure in the bottle.) Is it a chemical change?

36. When you crack a glow stick, hydrogen peroxide mix with other chemicals, causing it to glow and warm up. ANSWER: Yes EVIDENCE: - color change - temperature change Is it a chemical change?

37. Chemical Changes October 11, 2013 DO NOW: Date: October 11, 2013 6.5 D identify the formation of a new substance by using the evidence of a possible chemical change such as production of a gas, change in temperature, production of a precipitate, or color change. Q?: What evidence of a chemical reaction did we observe during block day’s lab? Q?: What evidence of a chemical reaction did we observe during block day’s lab? Ms. Smith Mrs. Malone Ms. Cedillo

38. Announcements: Announcements: – Absent for this week’s lab? Make it up in tutorials after school on Monday – Science Olympiad meets Monday! – Did you turn in your Chemistry in the Kitchen Homework? – Did you turn in your Do Now sheet?

39. Chemical Changes Cornell Notes www.ohenryscience6.weebly.com www.ohenryscience6.weebly.com www.ohenryscience6.weebly.com Click on Handouts. Click on the Chemical Changes Presentation link. Click Open. Click on Handouts. Click on the Chemical Changes Presentation link. Click Open. Press F5 to make the presentation full screen Press F5 to make the presentation full screen