Do NowFriday, August 29, 2014

Please read over your lab handout and begin filling in the blanks in

the opening paragraphs.3.5 minutes

Do Now Check

By the end of the day today, IWBAT…• Calculate & convert SI Units of measurement

Why it matters in LIFE: The vast majority of the planet uses these alternate standards of measurement.

Why it matters in THIS CLASS: You will need to master measurement and graphing to ensure a minimum success rate of 85%!

Agenda

Do Now 3 min

Lab Instructions (Pptx) 5 min

Group Sorting 2 min

Data Collection & Completion

41 min

Friday, 08/29/14TEKS:

P.2A: Organize and evaluate data, making inferences on the data

produced during laboratory

experimentation.

By the end of today, IWBAT…Explain, calculate

and convert SI Units of

measurementEssential Question:What are SI

Units of measurement?

Topic:Scientific Methods

Expectations (Lab)

Eyes on me when I am giving directions Identify important information on the

Pptx slides Raise your hand if you have a question

or need help

Height vs. Mass Lab

The purpose of this lab is to review the graphing and math skills you will need to be successful in Physics. Next week we will start by graphing motion

in 1-dimension!

Question of the Day

Just like real scientists and engineers, when we do labs, we are going to have one question that we will work to answer, ensuring that we are constantly using the process of the Scientific Method and applying our learning to real-life situations

Question: If we know height, can we determine mass?

Introduction

Questions drive scientific discovery. Through a systematic process, scientists and engineers test hypotheses, expanding our knowledge of the universe. In an experiment, the scientist or engineer is only allowed to change on variable at a time.

Graphing the Independent and Dependent Variables

If you are measuring the amount of bacteria over time, what is the independent and dependent variable?

Independent Variable on the x-axis!

Dependent Variable on the y-axis!

Laboratory Question

If Ms. McNutt is 5 foot 3 inches tall, what is her mass?

Pre-Laboratory Questions

Take 10 minutes to answer the pre-laboratory questions with your partner

When you are finished, eyes on me.

Independent and Dependent Variable

The variable that is being changed by the experimenter is called the ______________________ variable.

The variable that changes as result of the independent variable is called the ______________________ variable.

In other words, the ________________________ depends on the _______________________.

Independent

Dependent

Independent variableDependent variable

Quick Checks!

The score you receive on a test depends on the time you spent studying. Independent variable?

Time spent studying Dependent variable?

Test score

The amount you sweat depends on the temperature. Independent variable?

Temperature Dependent variable?

Amount of sweat

Procedure and Data Collection Complete Steps 1-4

GraphingWhat should we

label the x-axis? y-axis?

Height (cm)

Mass (

kg

)

Mass vs. Height Graph

Best-Fit Line

Best-fit lines help us to see trends in data. Let’s apply a best-fit line to this data to analyze our results.

Best-fit line

Slope!

Slope is otherwise known as .

The is 2.

The is 1. =

Slope = 2

Equation of a Line

m is slope b is y-intercept

=

You already solved for slope! (plug in for m)

What is Ms. McNutt’s mass?

Using your graph, what is my mass based on my height?

Now use your equation for your best-fit line to find my mass Is my height a x-value or a y-value? Input and solve.

Do your 2 answers match up?

Conclusion

Accuracy is the degree of closeness of a measurement to the actual value.

Precision is the degree to which a measurement can be repeated and get the same result.

We will be working with these two ideas in our next lab next week.

Closing

Reminders:You should fill out your Unit

01 Cover Sheet!!

Keep your binders

organized: first binder quiz on

09/12/14