Classroom Rules Students must be in the classroom when the bell rings. Bring all materials to class with you. (paper, pencil/pen, assignments, and resources) Students must raise hand before getting up out of seat or answering a question. Assignments must be placed in tray when requested. Teacher will dismiss class not the bell.

Student Biography What was your last science/math class? What was your grade? What is your strongest and weakest subjects? Do you have access to a home computer? What are your hobbies/interests? Do you have a job after school? What type of career are you interested in pursuing?

What is Chemistry?

Study of matter and the changes matter undergoes.

Describe what this picture says to you about chemistry.

Chemistry

Bell Ringer: Scientific Method What are the steps to the scientific method? Why do scientists use the scientific method? How have you used the scientific method outside of science?

How do you process information best ? nwlink.com

Multiple Intelligences by Howard Gardner Ways in which we process information about our world. C2workshop.typepad.com

Scientific Skills Objectives I can identify the importance of the scientific method and apply it to real world applications. I can understand the difference between precision and accuracy. I can compare the difference between qualitative and quantitative results. I can convert quantitative results using metric and english conversions. I can express large and short numbers using scientific notation.

Airplane Lab Objectives: Scientific Method Independent vs. Dependent Variable Quantitative vs. Qualitative Data Scientific Notation Metric Conversions

Laboratory Objectives Students will be able to recognize and apply the correct lab equipment for each lab. Students will be able to measure and analyze experimental data correctly.

Experimental Design Independent variable variable “I” control in the experiment. Always plot on x-axis Dependent Variable variable depends on the independent variable Always plot on y-axis

Experimental Data Qualitative Data data you observe thru your senses Quantitative Data data that is measurable

Accuracy and Precision To learn why it is necessary in science to use these in measurments.

good accuracy but poor precision good precision & good accuracy poor accuracy but good precision poor precision & poor accuracy

Quantitative Measurements Scientific Notation: To abbreviate very large or very small measurements. 0.0025cm = 2.5 x10-3 cm 250 cm = 2.50 x102 cm

Metric Conversions

Metric Conversions k  h  dk  base  d  c  m Convert 0.0748 m to cm = 0.00748 cm Convert 0.0048 kg to g = 4.8 g

Metric to English k  h  dk  base  d  c  m a. How many meters are in a 100 yard football field? How many centimeters are in 2 feet ? c. Convert 4 pounds (lbs.) to milligrams?

Metric to English k  h  dk  base  d  c  m d. Convert 15 kilometers to miles.

Class Results on Airplane Flight Group # Airplane Model Average Flight Distance (cm) 1 2 3 4 5 6 7

Lab Experiments Background Terminology Independent vs. Dependent Variables Qualitative vs. Quantitative Data Accuracy vs. Precision Measurement Conversions (scientific notation, metric, and metric to english) New Terminology: -Significant Figures

Measurement Conversions Density = mass/volume K = 0C + 273 0C = K – 273 1 m = 1.09 yd 2.54 cm = 1.0 in. 1.0 km = 0.62 mi. 1.0 mi. = 5,280 ft 454 g = 1.0 1b.

Factor Label Method k  h  dk  base  d  c  m

Measurement Lab How do scientists limit the degree of uncertainty in a measurement? Appropriate instrument Repeat expt. trials for precision and accuracy Observing significant figures Purpose: Establish a relationship between significant figures and accuracy

Density Lab Experimental Group Experimental Density Values (g/mL)

Density Lab

Scientific Skills Review

Density and Temperature D= mass/volume (Heart) Temperature commonly measured in 0C K = 0C + 273: K= Kelvin oC= degrees Celsius

Bell Ringer: Calculations with Measurements Calculate the following measurements with .the correct number of significant figures a. 8.3 m x 0.0020 m = b. 4.10 g + 3.4g + 8g =

Laboratory Rules Homework: Please read over rules, sign, and return.