Take Out
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Transcript of Take Out
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Take Out
PencilEraser
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When finished with quiz…
Copy down “Good Data” rules from whiteboard onto the bottom of page 26
Conventions for Good Data:
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Catalyst1. List the 3 sections of your first 8th
grade lab report, and their corresponding objectives. Hint – They have a star next to them.
2. What information needs to be contained in each section of the lab report?
3. How confident do you feel in writing a lab report? Which section of the lab report do you think will require the most effort on your part? Why?
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Page 29 – 5 even horizontal sections
Label the sections….Statement of Purpose:Hypothesis:Independent Variable:Dependent Variable:Constants:
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Statement of Purpose
To determine the mathematical and graphical
relationship between ____________________ (IV) and _____________________. (DV)
Independent Variable always comes first in Statement of Purpose!
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Hypothesis
If _________________________________ then (What will the IV do? Usually increase…)
_______________________________________ (What will the DV do in response?)
because ________________________________. (Why will this cause/effect happen?)
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Independent & Dependent Variables
What is measureable about the objects on your table?
Come up with at least 4 IV/DV pairs
• 1st pair• 2nd pair• 3rd pair• 4th pair
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Constants
Constants are…..
Bulleted list!
• 1st constant• 2nd constant• 3rd constant• 4th constant• Etc.
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Homework
Complete Constants in science notebook.
Look over the “Model Lab Report” on my website
Type the first part of the Experimental Design of your lab report (Statement of Purpose, Hypothesis, Independent Variable, Dependent Variable, Constants)
Save on your computer. You are welcome to e-mail it to me so that I can check it and save an additional copy.
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Take Out
PencilCatalyst SheetScience notebook
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CatalystWrite a materials list and detailed,
step-by-step procedures for how to make a peanut butter and jelly sandwich.
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Page 30
Split page in half horizontally
Split top section in half vertically
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Page 31
Split page in half horizontally
Top section: Raw Data Table
Bottom section: Observations
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Materials List
• All materials used are provided• Amount of each material with units are
specified• Tools and equipment are specified by name
and size• Materials are presented as a bulleted list
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Procedures
• Procedures test the stated hypothesis• Details of how the experiment will be
performed are clearly stated and thorough• Methods for precisely measuring the variables
are explained in detail• Procedures are presented as a numbered list
using complete sentences (with periods at the end)
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Apparatus
• Includes all laboratory equipment used in the investigation
• Neatly diagrammed with clear labels• Demonstrates how components of the apparatus
are organized and used during the experiment• Components are drawn to scale and in color• Can be created on the computer or drawn on a
separate sheet of PRINTER PAPER
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Apparatus
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Raw Data Table
• Descriptive title that describes what is contained
• Organized into rows and columns• Row and column labels are accurate• Units are included wherever necessary• Data is recorded to one digit of uncertainty
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Observations
• Observations are relevant, accurate, precise and detailed
• Potential sources for error are noted in the observations
• Bulleted list of complete sentences• Number of observations is realistic for a lab of
this scope
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Homework
Add typed Materials List and Procedure to lab document
Create final Apparatus (on computer, or a separate sheet of printer paper)
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Take Out
PencilCatalyst SheetScience notebook
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Catalyst1. What is a “source of error” in a lab?2. List at least 3 potential sources of
error that you may have in the Circumference vs Diameter lab.
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Circumference vs Diameter Lab
• Remember that you need 4 trials for each measurement
• You should have 1 uncertain digit per measurement
• Underline the uncertain digit
• Don’t forget to write down Observations
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Take Out
PencilCatalyst SheetScience notebook
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Marie and Seth are working on a lab activity where they are tracking the amount of food
provided to mealworms (independent variable) to see if this affects the length that
the mealworms have grown to after 1 week (dependent variable). For each amount
of food, four trials were carried out. Their data is as follows: The mealworms that
were given 1 gram of food grew to 3.5 cm, 3.6 cm, 3.5 cm, and 3.4 cm. The
mealworms that were given 2 grams of food grew to 4.2 cm, 4.4 cm, 3.4 cm, and 4.5
cm. The mealworms that were given 3 grams of food grew to 6.0 cm, 6.2 cm, 5.9
cm, and 5.6 cm. The mealworms that were given 4 grams of food grew to 6.2 cm,
6.0 cm, 6.2 cm, and 6.0 cm.
Find the average growth length for each amount of food, and organize these values into a data table of JUST the averages.
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1 g2 g3 g4 g
3.5 cm4.1 cm5.9 cm6.1 cm
Amount of food given Average length of growth
The effect of the amount of food given to mealworms (g) on their average length of growth (cm)