Thursday, January 24 th Turn in the Syllabus Scavenger Hunt into your classes box Do Now: (write question and answer) 1. What is one of your Big Goals 2. When are your materials and Parent Letter due? 3. What is biology?

Our Big Goal ALL students will achieve at least an 85% mastery of each objective as measured by quizzes, unit assessments, and exams. ALL students will score a 3 or 4 on the Biology EOC. You will learn to think, act, and work on a college level and will become more inquisitive and globally aware scientists.

Materials Needed by Monday Required: ½ or 2” 3-Ring Binder Dividers (or you can make your own!) Loose leaf paper Optional: (you will receive college credits!) Tissues Glue sticks Scissors highlighters

School-Wide Rules No cell phones/ipods/ear phones – NO warning –I will confiscate it and it goes straight to the office till you parent picks it up. Refusal to turn over phone is a 3-day suspension No cursing No talking when teacher or student is talking NO FOOD OR DRINK (closed water bottle is ok)

Homework 1.Parents/Guardian need to review the syllabus and complete and sign the Parent Letter (Due Friday!!) 2.Materials needed by Friday FOR A QUIZ GRADE!

The Scientific Method

An organized way to solve a problem through experimentation & observation.

The 6 Steps of the Scientific Method

1. State the Problem Form a question about a specific event Example: Mouthwash kills bacteria. Which brand works best?

2. Collect Background Information Research the problem Example: Read the labels of types of mouthwash Which has the most antiseptic (germ- killing) ingredients.

3. Form a hypothesis Make a testable educated prediction based on your research. Example: IF Listerine has more antiseptic ingredients than Crest or the Wal-Mart brand, THEN it will kill more bacteria. A hypothesis can be recognized by an “if, then” statement.

4. Design an Experiment Create a way to test your hypothesis. Create aCONTROLLEDexperiment.

A controlled experiment MUST have 2 groups. CONTROL GROUP: all conditions remain the SAME! It is a group you do not do anything to. EXPERIMENTAL GROUP: a group or many groups who you test. The experiment is performed on this group.

Establish the variables for your experiment. INDEPENDENT VARIABLE: the variable that you change or manipulate (X axis for graphing) DEPENDENT VARIABLE: the change or result that happens when the independent variable is used (Y axis for graphing)

Mouthwash Experiment Petri dish Bacteria grown from swab Control Group -no mouthwash Experimental Group Listerine Crest Brand Wal-Mart brand

Mouthwash Experiment INDEPENDENT VARIABLE: DEPENDENT VARIABLE: Type of Mouthwash Amount of bacteria killed

5. Collect & Analyze Data Run the experiment & document the data

2 Types of Data QUANTITATIVE: numerical data, deals with specific quantities, usually in the form of a graph or chart QUALITATIVE: descriptive data, describes how something looks, smells, sounds, or feels; deals with qualities

QUALITATIVE EX: The control group and the Wal-Mart brand have a strong smell; the Listerine & Scope don’t smell as bad. QUANITATIVE EX: Area of Inhibition for Mouthwash Brands ControlListerineScopeWal-Mart 5 min0 mm3 mm2 mm1 mm 10 min0 mm4 mm3 mm 15 min0 mm6 mm5 mm4 mm 20 min0 mm8 mm6 mm4 mm

6. Draw Conclusions Determine from the data collected if the hypothesis was correct or incorrect EX: Listerine did kill more bacteria than the other brands because it had more antiseptic ingredients.

Check Point 1 1. Which step of the scientific method is used to develop a hypothesis? 2. Which step is an educated prediction about the outcome of the experiment? 3. List the Six Steps of the Scientific Method (in order):

Scientific Method Manipulatives With your partner: Match the step with the definition and example STEP DEFINITION EXAMPLE

Check Point 2

Stations You will be rotating around to 3 different stations

Exit Ticket 1.List the SIX steps of the Scientific Method in order. 1.Why is the control group important?

Class Experiment You will be designing an experiment to help you to better understand the scientific method. Break up into groups (of 2-3 members) and design an experiment to investigate any testable hypothesis. Choose only one variable to manipulate. You will must work through all of the steps of the scientific method: –ask a question –develop a hypothesis –state the objectives of your experiment –design your experiment (list materials that you will use, and outline your procedure in detail, determine what data you will collect) –analyze your data –draw a conclusion (was your hypothesis supported or not?).

Scientific Method Vocabulary Observation- the act of observing (touch, taste, smell, feel, see, etc.) Inference- a quick conclusion that attempts to explain an observation Prediction- to forecast; to guess the outcome of a situation beforehand Analysis- to separate or break apart into smaller sections for study

Scientific Method Vocabulary Conclusion- to close or bring to an end; to accept or reject a hypothesis in an experiment Data- recorded observations or measurements Hypothesis- a tentative explanation that accounts for a set of facts & that can be tested by further investigation

Scientific Method Vocabulary Controlled Experiment- an experiment in which all variables except the ONE being tested are identical in order to make the experiment fair & the results reliable Variable- any factor in an experiment that could affect the results & is therefore tested separately

Scientific Method Vocabulary Controlled Variable- a variable that is not changed Independent Variable – a variable that you purposely manipulate (manipulated variable) Dependent Variable- the variable being observed that changes in response to the independent variable (responding variable)

Scientific Method Vocabulary Quantitative Data- data that involves numbers or measurement usually in the form of a chart or graph Qualitative Data- anecdotal or descriptive data that does NOT involve numbers or measurement