Upload
teresa-fleming
View
220
Download
0
Tags:
Embed Size (px)
Citation preview
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