Inquiry: What is surface area and how can I change the surface area of an object? Instructions: Take out your: 1) lab sheet(the one that says “Score” on.

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Presentation transcript:

Inquiry: What is surface area and how can I change the surface area of an object? Instructions: Take out your: 1) lab sheet(the one that says “Score” on the top, 2) Graph (if you completed graph) & 3) completed lab checklist Make sure they are stapled in that order. Take out your binder.

Inquiry: What is surface area and how can I change the surface area of an object? Do Now: What is the area of this surface? Surface: the outside layer of something. Area = base x height 6 cm. Area = 6 cm. x 6 cm. Area = 36 cm. 2

How many surfaces does a cube have? This shape has _______ surfaces. 6 Inquiry: What is surface area and how can I change the surface area of an object?

Surface

Total surface area = the sum of the areas of each of the surfaces. 6 cm. Number of surfaces = ______ Total surface area: Area of surface 1: _________ Area of surface 2: _________ Area of surface 3: _________ Area of surface 4: _________ Area of surface 5: _________ Area of surface 6: _________ Total: _________ cm cm. 2

Our cube/block has 6 surfaces. Lets split our cube/block into 2 halves. Now what is the total amount of surfaces for both halves? 6cm 3cm 6cm 3cm How many TOTAL surfaces?__________________12 (6 for each shape) Did cutting the block increase or decrease the TOTAL amount of surfaces? ________________________ Increased from 6 to 12 surfaces.

Now what is the total surface area of both halves? 6 cm. 3 cm. Number of surfaces = ____________ Surface area of shape #1: Area of surface 1: _________ Area of surface 2: _________ Area of surface 3: _________ Area of surface 4: _________ Area of surface 5: _________ Area of surface 6: _________ Total: _________ 6 cm. 36 cm. 2 6 (for shape 1) 18 cm cm. 2 Surface area of shape #1: ___________ Surface area of shape #2:+ ___________ Total: ____________ 144 cm cm cm cm cm 2 +

Let break our original cube into 6 pieces. How many TOTAL surfaces are there now? 6 surfaces 12 surfaces How many total surfaces? _________________ As we break the block into more pieces the total number of surfaces ________________. increased 6 surf. 36 surfaces 6 surf.

Let break our original cube into 6 pieces. How many TOTAL surfaces are there now? 6 surfaces 12 surfaces As we break the block into more pieces the total number of surfaces ________________. increased 6 surf. 36 surfaces 6 surf.

Now what’s the total surface area? 3 cm. 6 cm. 2 cm. Surface area of shape one: Number of surfaces = ______ Area of surface 1: _________ Area of surface 2: _________ Area of surface 3: _________ Area of surface 4: _________ Area of surface 5: _________ Area of surface 6: _________ Total: _________ 6 12 cm cm. 2 6 cm cm. 2 Surface area of shape #1: ___________ ___________ Total: ____________ 72 cm cm. 2 x 6 shapes 72cm 2

How did the surface area change? Surface area: 216 cm 2 Surface area: 288 cm 2 Surface area: 432 cm 2 As the we broke apart the cube, the number of surfaces _______________, and the total surface area_______________. increased Inquiry: What is surface area and how can I change the surface area of an object?

(increases or decreases) General Rule: Breaking or crushing an object _________________ its surface area because ______________________. increases It exposes more surfaces

Inquiry: What is surface area and how can I change the surface area of an object? Task: You will plan and complete your own investigation answering the question: How does changing the surface area of an antacid pill affect how fast it reacts with water? This lab counts as a quiz grade! Investigation Plan = 25 points (25%) Completed lab = 50 points (50 %) Written Summary = 25 points (25%)

Inquiry: What are some different variables that affect digestion? Record in your binder the following student observations about the digestive system (5 mins.) - Digestion (breaking down of food) is a Chemical Change -Food travels from mouth  esophagus  stomach  small intestines  large intestines  rectum  anus - The stomach is about the size of your fist and it is toward the upper left side of your abdomen. -Chewing physically changes the surface area of food while enzymes (en-zeyemes) chemically changes food. -The stomach moves/churnes while food is digesting. -Drinking warmer beverages helps digestion.

Task: This week you will choose to investigate one of the following questions: 1) How is the chemical reaction rate of an antacid pill affected by its surface area? 2) How is the chemical reaction rate of an antacid pill affected by stirring? 3) How is the chemical reaction rate of an antacid pill affected by temperature? Research and organize some information about each variable: 1)Read the section “Surface area and Chem. Changes/Reactions” use your notes and what you learned yesterday to fill in the blanks (4 mins.) 2) Read the section “Stirring area and Chem. Changes/Reactions and fill in the blank based on your prior knowledge (2mins.) 3) Read the section “Temp. area and Chem. Changes/Reactions” Observe the demo and fill in the blanks. Inquiry: What are some different variables that affect digestion?

Task : 1)Choose a one of the three questions to investigate and write it down in your binder. (some students may be assigned a question) You will be using an antacid pill and water to complete your investigation 2) Complete the investigation plan on the back of your information sheet 3) Think about who you would like to work with (they must be investigating the SAME question. (Maximum of 3 per group) Inquiry: What are some different variables that affect digestion?

L.T: I can investigate how changing the surface area of an antacid pill affects how fast it reacts with water. Do Now: Identify the independent var., dependent var. and constants for the following question. “How does changing the amount of clothing a person has on affect how fast they run?” Independent variable: Dependent variable: Constants: The amount of clothing How fast the person is runs The track, the distance, the contestants

Journal Entry (5 mins) 1)Place the antacid pill in the cup of water 2)Record your observations 3)What are the reactants? 4)What are the products? L.T.: I can complete my individual and my group Investigation Plan.

Task: A group recorder sheet will be based around. -Find the section with your class (701 and 702 in the front of the sheet, 703 on the back of the sheet) -In the 1 st column, write the names of your group members (you name only needs to be recorded ONCE). -Check the box that states the variable that you will be investigating. -I will confirm whether you may investigate the question you chose. -Complete your individual Investigation Plan (on the back of yesterday’s worksheet). - Once each member has completed an individual plan, you will receive a Group Investigation plan. Complete your group plan.

Task: This week you will choose to investigate one of the following questions: 1) How is the chemical reaction rate of an antacid pill affected by its surface area? 2) How is the chemical reaction rate of an antacid pill affected by stirring? 3) How is the chemical reaction rate of an antacid pill affected by temperature? Research and organize some information about each variable: 1)Read the section “Surface area and Chem. Changes/Reactions” use your notes and what you learned yesterday to fill in the blanks (4 mins.) 2) Read the section “Stirring area and Chem. Changes/Reactions and fill in the blank based on your prior knowledge (2mins.) 3) Read the section “Temp. area and Chem. Changes/Reactions” Observe the demo and fill in the blanks. Inquiry: What are some different variables that affect digestion?

L.T: I can investigate how changing the surface area of an antacid pill affects how fast it reacts with water. Vs.

How did the surface area change? Surface area: 216 cm 2 Surface area: 288 cm 2 Surface area: 432 cm 2 As the number of surfaces _______________, the total surface area_______________. increased L.T: I can investigate how changing the surface area of an antacid pill affects how fast it reacts with water. How can I change the surface area of an antacid pill?

L.T: I can investigate how changing the surface area of an antacid pill affects how fast it reacts with water. Graduated Cylinder Graduated Cylinder: used to measure volume of water Meniscus: curved water line. Measure water at the bottom of the meniscus

L.T: I can investigate how temperature and stirring an antacid pill affects how fast it reacts with water. Task: You will plan and complete your own investigation answering the question: How does changing the surface area of an antacid pill affect how fast it reacts with water? This lab counts as a quiz grade! Investigation Plan = 25 points (25%) Completed lab = 50 points (50 %) Written Summary = 25 points (25%)

L.T: I can investigate how temperature and stirring an antacid pill affects how fast it reacts with water. Different variables that affect the rate (how fast) a chemical reaction happens: We’ve investigated Surface Area Temperature Stirring

L.T: I can investigate how temperature and stirring an antacid pill affects how fast it reacts with water. Task: You will plan and complete your own investigation answering the question: How does changing the surface area of an antacid pill affect how fast it reacts with water? This lab counts as a quiz grade! Investigation Plan = 25 points (25%) Completed lab = 50 points (50 %) Written Summary = 25 points (25%)

L.T: I can investigate how temperature and stirring an antacid pill affects how fast it reacts with water. Task: 1)Complete investigation plan for the question: “How does temperature affect how fast an antacid pill reacts with water?” 2) Complete investigation plan for the question: “How does stirring an antacid pill affect how fast it reacts with water?”

L.T: I can investigate how temperature and stirring an antacid pill affects how fast it reacts with water. Task: Edit your lab -Complete materials list - Complete your full procedure -Create a data table

L.T: I can investigate how temperature and stirring an antacid pill affects how fast it reacts with water. Task: Edit your lab -Complete your investigation - Complete your graph -Complete your conclusion

L.T: I can investigate how temperature and stirring an antacid pill affects how fast it reacts with water. Task: 1)Complete investigation plan for the question: “How does temperature affect how fast an antacid pill reacts with water?” 2) Complete investigation plan for the question: “How does stirring an antacid pill affect how fast it reacts with water?”

Inquiry: How does surface area, temperature, and stirring affect reaction rates? Task: You will plan and complete your own investigation answering the question: How does changing the surface area of an antacid pill affect how fast it reacts with water? This lab counts as a quiz grade! Investigation Plan = 25 points (25%) Completed lab = 50 points (50 %) Written Summary = 25 points (25%)

Inquiry: How does surface area, temperature, and stirring affect reaction rates? Increasing the Surface area makes chemical reactions go faster by allowing more atoms to react with each other. Vs. Surface area and Chemical Reactions

Inquiry: How does surface area, temperature, and stirring affect reaction rates? Surface Area Reaction Speed 01234

Inquiry: How does surface area, temperature, and stirring affect reaction rates? Heat makes chemical reactions go faster because there is more energy helping to create and/or break chemical bonds Vs. Temperature and Chemical Reactions

Inquiry: How does surface area, temperature, and stirring affect reaction rates? Temperature Reaction Speed

Inquiry: How does surface area, temperature, and stirring affect reaction rates? Stirring increases the speed of a chemical reaction by adding energy to help create and/or break bonds between atoms Vs. Stirring and Chemical Reactions

Inquiry: How does surface area, temperature, and stirring affect reaction rates? Stirring Reaction Speed

Inquiry: How does surface area, temperature, and stirring affect reaction rates? Exit Ticket: Read the article “Rate of digestion’ and answer the questions.