Signs of Chemical Change October 14, 2014 Ms. Smith Mrs. Malone DO NOW: Date: October 14, 2014 TEKS: TEKS: 6.8B calculate density to identify an unknown substance 1.Get out your gold Do Now sheet 2.Put your CB and agenda on your desk 3.Write down this week’s HW: “Physical vs. Chemical Properties HW – due Friday” 4.Copy this week’s TEKS onto your Do Now sheet 5.What evidence of chemical change do you observe in the animated gif to the right?

Homework: Physical vs. Chemical Properties HW – Due Friday Homework: Physical vs. Chemical Properties HW – Due Friday Announcements: Announcements: – Did you turn in your Mystery Powders Lab last week? It’s a major (test) grade

Evidence of Chemical Reaction Investigation p. __-__ in CB Left side: Right side: Evidence of Chemical Reactions Gas Production (bubbling, fizz) Color Change Temperature Change (Exothermic – hot or Endothermic – cold) Solid Precipitate Chemical 1Chemical 2 Chemical 1 Name:Chemical 2 Name: Properties Before Reaction: Evidence of Reaction Observations Evidence of Chemical Change: Description of new substance(s) formed:

Evidence of Chemical Change October 14, 2013 : Let’s REVIEW before we begin the investigation! Chemical changes occur when matter has changed into a new substance through a chemical reaction.  color change  bubbling and fizzing (gas)  solid precipitate  temperature change  endothermic (cold)  exothermic (hot) Ms. Smith Mrs. Malone

Group Member Roles : RED - Materials Manager Obtains and returns all lab materials BLUE - Safety/Clean-up Manager Enforces all safety rules (wear goggles, waft odors, broken glass procedures) YELLOW - Activity Director Reads directions to the group Keeps group on-task GREEN - Data Manager Ensures all group members have lab data and are ready to present October 14, 2014 Ms. Smith Mrs. Malone

Safety Warning : For your safety: The proper way to smell odors in the laboratory is to waft them. Do not put your face directly over chemicals to smell them! Practice this technique with me! October 14, 2014 Ms. Smith Mrs. Malone

Signs of Chemical Reaction Lab : Observations: color, temperature, state of matter, odor (waft!), transparent/opaque, texture, etc. Remember antecedent before pronouns! For example : “The aluminum was an opaque solid. It was silver in color.” Materials: Materials: lab tray, goggles, beaker labeled #1, beaker labeled #2, beaker labeled reactantProcedures: 1.Record detailed observations of both chemicals 2.Gently pour the chemical from beaker #1 into the reactant beaker 3.Gently pour the chemical from beaker #2 into the reactant beaker 4.Record detailed observations onto your lab handout 5.Record evidence of a chemical reaction 6.Clean-up and be ready to present! October 14, 2014 Ms. Smith Mrs. Malone

Signs of Chemical Reaction Lab : Presentations! Each group member should be ready! 1. Give the class your group number 2. Tell the class what you observed about each reactant chemical (color, temperature, state of matter, odor, transparent/opaque) 3. Tell the class what you observed about the product(s) of the reaction (colors, temperature, state of matter, odor, transparent/opaque) 4. Tell the class which signs of a chemical reaction you observed (temperature change, gas produced, precipitate, color change) October 14, 2014 Ms. Smith Mrs. Malone

Introduction to Density October , 2014 DO NOW: Date: October 15-16, 2014 TEKS: 6.6B calculate density to identify an unknown substance 1.Put your CB on your desk 2.Refer to the Do Now Reading “Reading Science!: Density” 3. Q?: What was Archimedes discovery, and why was it important? Ms. Smith Mrs. Malone

Homework: Physical vs. Chemical Properties HW – Due Friday Homework: Physical vs. Chemical Properties HW – Due Friday

Density Cornell Notes – Pre-AP 1.Turn to page __ in your comp book and title it “Density Notes” 2.Set up your Density Notes page using the Cornell Notes guide at your table 3.Complete your notes in your composition book using the Class Set handout We will be performing a comparative investigation about the density of water next, so take excellent notes! We will be performing a comparative investigation about the density of water next, so take excellent notes!

Density Cornell Notes – Grade Level 1.Turn to page __ in your comp book and title it “Density Notes” 2.Tape the Density Notes handout into your composition book on this page 3.Complete your notes on the handout in your composition book using the Class Set Density Notes page at your table We will be performing a comparative investigation about the density of water next, so take excellent notes! We will be performing a comparative investigation about the density of water next, so take excellent notes!

Density of Water Investigation Major Grade (Test Grade) – You must collect all data today Major Grade (Test Grade) – You must collect all data today Move 100g rider first, 10g rider second, and use pencil tip to carefully move 1g rider last. Move 100g rider first, 10g rider second, and use pencil tip to carefully move 1g rider last. Triple beam balance measurements are to the hundredths place (2 decimal places). The last digit will be estimated (0 if the rider is right on the line and 5 if it is in between two lines). For example: g or g Triple beam balance measurements are to the hundredths place (2 decimal places). The last digit will be estimated (0 if the rider is right on the line and 5 if it is in between two lines). For example: g or g Read from bottom of meniscus in graduated cylinders. Each graduated cylinder is different. Read from bottom of meniscus in graduated cylinders. Each graduated cylinder is different. – 50mL and 100mL  Each line is 1mL. Read to the ones place and estimate either 0 or 5 for the tenths place (1 decimal place) For example: 39.0 mL or 39.5mL – 250mL  Each line is 2mL. Read to the closest even number and estimate the ones place. For example: 72mL or 73mL – 500mL  Each line is 5mL. Read to the closest multiple of 5 and estimate the ones place. For example: 205mL or 206mL Clean up all spills and throw paper towels in the trash (not the sink, counters, or recycle bin) Clean up all spills and throw paper towels in the trash (not the sink, counters, or recycle bin)

Chemical Changes and Density October 18, 2013 Ms. Smith Mrs. Malone Ms. Cedillo : Chemical Change Exit Ticket 1.Complete the “Chemical Change Exit Ticket” 2.Hand your teacher the exit ticket on your way out of class

Introduction to Density October 17, 2014 DO NOW: Date: October 17, 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. 6.6B calculate density to identify an unknown substance 1.Put your CB on your desk 2.Turn in your Physical vs. Chemical Properties HW 3.Refer to the Do Now “Reading Science!: Density” 3. Q?: In paragraphs 3 & 4 of this passage, what clues help you know the meaning of the word “immersed”? Ms. Smith Mrs. Malone

Reminder: Density of Water lab lab reports due today Reminder: Density of Water lab lab reports due today