Warm Up 9/27/13 Which of the following does NOT help to eliminate bias in scientific investigations? A. Including controls in experiments B. Using large samples of data when possible C. Conducting independent studies of the same questions D. Disregarding data that do not support the hypothesis

Warm Up 9/27/13 Which of the following does NOT help to eliminate bias in scientific investigations? A. Including controls in experiments B. Using large samples of data when possible C. Conducting independent studies of the same questions D. Disregarding data that do not support the hypothesis

Agenda & Homework KEEP warm-ups (short week next week) Independent group work (groups will be assigned) Choice board Magazine Footprint Forensics activity Skills Tutor/other computer work No homework!!

2nd Period Choice Board: Jamiah, Lorraine, Diego, Victor, Justin, Adam Choice Board: Charles, Maya, Andres, Rosy, Capri, Damani Magazine: Ebrima, Ed’Zavian, Quan, Decarlo, Chase, Jeremiah Magazine: Ashley, Taj , Aja, Danny, Forensic Footprints: LaQuaris, Ciara, Anna, Natalie, Jennifer, Kaiya Computer: Mykyria, Khari, Zechariah, Shakiriah, Timiya (then Kaiya)

3rd Period Choice Board: Gyonni, Chris, Jordan, Thomas, Haven, Reggie Choice Board: Shaniah, Jocelyn, Bruce, Edna, Christian, Terrence Magazine: Jaileny, Cameron, Erinn, Ashlee, Jaquez, Ja’Sean Magazine: Deshawn, Hunter, Davon, Tiffany, Forensic Footprints: Colette, Andrew, Samaria, Muhammed, Kareem, Hope Computer: Icesis, Fatima, Cyrus, Edna, Kyle

4th Period Choice Board: Kevin, Amin, Lena A., Kerren, Davyon, Jadah Choice Board: Karla, Alena, Nick, John D, Evan, Amariah Magazine: Tatyahna, Javaughn, Collin, Chris P, Monica, Ketasia Magazine: Syeda, Chris R, Precious, Stephen, Siani, Alexis Forensic Footprints: Trevanni, Anthony R, Kevyn, Tyler Computer: Vitoria, Lena B, John B, Isaiah, Jaquan

Warm Up 9/27/13 What is the smallest unit of a chemical compound that still has the properties of that compound? A. A nucleus B. A molecule C. An element D. An atom

Warm Up 9/27/13 What is the smallest unit of a chemical compound that still has the properties of that compound? A. A nucleus B. A molecule C. An element D. An atom

Agenda & Homework Turn in extra credit & remediation packets Review & turn in HW from Wednesday KEEP warm-ups (short week next week) Finalize labs Atoms Family Notes No homework!!

Chapter 11, pg 323 (0.20 x 10 AMU) + (0.80 x 11 AMU) = 10.8 AMU (0.92 x 28) + (0.05 x 29) + (0.03 x 30) = 28.11

Page 325, 2 – 6 & 9 2. atomic number 3. atomic mass 4. b. neutron 5. pg 324 (gravitational, electromagnetic, strong, weak) 6. (0.30 x 203 AMU) + (0.70 x 205 AMU) = 204.4 AMU 9. Different PROTONS = DIFFERENT elements!!

Warm Up 9/26/13 Which of the following is a reason that compounds are considered pure substances? They are only composed of one type of particle The substance is made of two or more elements that are physically combined Different samples of any compound have elements of different densities They can be separated by physical methods

Warm Up 9/26/13 Which of the following is a reason that compounds are considered pure substances? They are only composed of one type of particle The substance is made of two or more elements that are physically combined Different samples of any compound have elements of different densities They can be separated by physical methods

Agenda & Homework Turn in Ch 11 bookwork Set up hydrolysis labs Finish separation of mixture lab while hydrolysis is going Homework: None! Unless you haven’t finished Skills Tutor, because zeros are going in soon.

Mixture Lab Total mass should be about 25 grams +/- Each sections of beads should be about 5 – 7 grams +/- Percentages should be between 20 & 30% +/- Added together, you should get 100%! NO, you all should NOT have the same, but they will be close

On a piece of paper… Was the bead and water mixture homogeneous or heterogeneous? How could you tell? Was it a solution, suspension, or colloid? How could you tell? What property did you use to separate the beads? Was that physical or chemical? How do you know?

On a piece of paper… Was the bead and water mixture homogeneous or heterogeneous? How could you tell? You could see the parts! Was it a solution, suspension, or colloid? How could you tell? You could see them & they would settle What property did you use to separate the beads? DENSITY Was that physical or chemical? How do you know? We didn’t change the plastic or the water

Hydrolysis Observations Pencil Set-up Indicator Set-up Bubble rising from pencils More bubble from the negative side (H2 gas) Fewer bubbles from the positive side (O2 gas) Color change & bubbles by clips More blue on the negative side (H2 gas left an OH- base) Less pink on the positive side (O2 gas left H+ acid)

Same paper… Sketch the two set-ups on your table. Write at least three observations about each about what happens Based on what you know, what is happening in each set up? A chemical change – creating a different substance (O2 & H2 from H2O)

Test Today 9/25/13 Study for 10 minutes (chapter 4 work, warm-ups, worksheets, and last quiz) Test will be with i-respond Don’t forget to hit SEND after EACH answer!! When through, turn test upside down (I will collect Read Chapter 11, and complete 1 – 5 on page 323, and 2-6 & 9 on page 325

Warm Up 9/24/13 How is a compound different from a mixture? Compounds have two or more components. Each substance in a compound loses its characteristic properties. Compounds are commonly found in nature. Solids, liquids, and gases can form compounds.

Warm Up 9/24/13 How is a compound different from a mixture? Compounds have two or more components. Each substance in a compound loses its characteristic properties. Compounds are commonly found in nature. Solids, liquids, and gases can form compounds.

Agenda & Homework Review bookwork from chapter 4 Review yellow molecule sheet I have…who has… Closing Assessment Probe Homework: Complete all online assignments (Skills Tutor & Brain Pop – they are in Synergy)

Pages 108 – 109, #1 - 15 Compound Solubility Suspension Element Nonmetal Solute C B C B A Elements cannot be separated into simpler substances, but compounds can by chemical means

Molecule Models # of atoms # of dif el # of dif comp # of mol Is it pure? O2 2 1 Y H2 N2 NaCl NH3 4 CH4 5 H2O 3 CO2 y

Warm Up 9/24/13 Which of these statements about a hypothesis is true? A. It is valuable only when proved accurate B. It may be valuable even when it turns out inaccurate C. It is determined after a scientists experiments D. It provides a basis for changing data

Warm Up 9/24/13 Which of these statements about a hypothesis is true? A. It is valuable only when proved accurate NO, NICE BUT NOT NECESSARY B. It may be valuable even when it turns out inaccurate C. It is determined after a scientists experiments BEFORE D. It provides a basis for changing data NEVER

Agenda & Homework Footprint Mystery Directions – ALL except Science World magazine assignment Start putting together portfolio for choice board (I will work with groups) Finish Circle Map (certain groups) Computer Work (certain people) Homework: SKILLS TUTOR (Math Section due Friday)

Footprint Mystery Color footprints according to the key Analyze the data by putting it in the data table Answer questions in packet

To Finish (in order of priority) Testable Questions (list of 10 testable & non-testable) Background Research (six research questions on a SPECIFIC topic – or- brochure) Observations & Inferences (fable AND observation) Data (powerpoint or Tidy Clean (27A & B) Drawing Conclusions (cartoon/go animate/437A & B Science World magazine assignment Poster (certain classes) Footprints Forensics activity

Warm Up 9/23/13 If two poisonous elements are combined chemically, which of the following will be true of the resulting compound? The compound will be more poisonous than the gases. The compound will be as poisonous as the gases. The compound may or may not be poisonous. The compound will not be poisonous.

Warm Up 9/23/13 If two poisonous elements are combined chemically, which of the following will be true of the resulting compound? The compound will be more poisonous than the gases. The compound will be as poisonous as the gases. The compound may or may not be poisonous. The compound will not be poisonous.

Agenda & Homework Warm-Up Review quiz Review pink worksheet I have…who has…? Homework: Complete all online assignments

Properties of Metals & Nonmetals Malleable Lustrous Ductile Conductor Metallic bonding Gives away electrons Making positive ions Examples - Zinc Nickel Gold Titanium Thallium

Properties of Metals & Nonmetals Covalent bonding Forms negative ions Brittle Nonconductor Gaseous at room temperature Receives electrons Examples – Selenium Boron Argon Helium Phosphorus

Mixtures, Compounds, Solutions Milk Water Rubbing alcohol Coffee Carbon dioxide Sugar water Air Ammonia Salt water Ink Sugar Soda Blood Alcohol Humidity Sand Table salt Brass

Warm Up 9/23/13 Which technological tool would be most useful for storing and retrieving data? A. Balance B. Model C. Computer D. Beaker

Warm Up 9/23/13 Which technological tool would be most useful for storing and retrieving data? A. Balance B. Model C. Computer D. Beaker

Agenda & Homework Smart Board - variables Fransesco Redi’s Experiment Working on Drawing Conclusions choice Homework: Skills Tutor

http://www.solpass.org/5s/Games/ScientificMethodPlank.html http://faculty.washington.edu/chudler/experi.html