Today's Quote:
Recap:
On Thursday and Friday, we reviewed precision and accuracy and then moved on to calculating percent error. We said that the formula we will use to calculate margin of error (MOE) is
% Error= Measured or observed value- actual or target value/ Actual value X 100.
I presented the class with a data series from measuring several cubes. They measured each cube and came back with the following data points:
24.6mm3
24.7mm3
25.1mm3
24.0mm3
24.2mm3
---------------
122.6mm3/5 = 24,52 mm3. Rounding this to three significant digits we get 24.5 mm3. This would be our measured value.
In order to get an accurate measured value, first, we had to find the average of these numbers. I explained that to find an average, you add up all of your values and then divide by the number of values you have. I also pointed out that it is important to round to three significant digits in science. If we add up the numbers above we get 122.6mm3. We then take that and divide by 5 (the number of values we added)
I then told them that the actual or target value was 25.0mm3 and that all the cubes were that value. Our purpose here is to calculate our % error and try to determine why we have or if we have an error that is statistically significant.
If that is the case then our % Error formula looks like this:
% Error= 24.5mm3- 25.0mm3 / 25.0mm3 X 100
Solving this gives us: -0.50mm3/ 25.0mm3 X 100
We said that we can't use a negative value in this calculation so we have to take the absolute value of the number.
Brain Bender:
When Mama Leona boils pasta, she adds three drops of oil and two drops of vinegar to the water. While at the market, Mama accidentally dropped and broke the vinegar bottle Undaunted, she instructed the shopkeeper to put both the oil and the vinegar in the same jar. How could Mama pour exactly three drops of oil and two drops of vinegar into the water using just the one bottle?
Agenda:
(This should be written in your planner every day)
1. Finish Conversions Lab. Lab: Conversion factors. It is important to be able to convert between different units and especially between the SI (System Internationale) or what Americans call the metric system and our standard or Imperial system of measurement. 8th graders will do a similar lab, only we will also collect data on heating a water sample with the end goal of creating a data table and graph.
2. Lab safety Rap and review lab safety equipment locations
Homework:
End of unit exam. This will go live and is due on Wednesday
6th Grade Honor's Earth Space Science:
6th Grade Class Information and Syllabus
Unit Essential Question:
What are the basic ideas behind the process of science?
Key Learning Statement:
Science is a process based upon observational and experimental studies using scientific methods to develop or explore scientific theories or laws.
7th Grade Honors Life Science
7th Grade Class Information and Syllabus
Unit Essential Question: What methods do scientists use to answer questions and solve problems in the natural world?
Key Learning Statement: Scientific inquiry involves forming a testable hypothesis and developing a valid investigation using scientific skills and tools to determine if the hypothesis is supported or not supported. Data from scientific investigations helps scientists explain natural events through the use of scientific theories and scientific laws.
8th Grade Honors Physical Science
Unit Essential Question: What is required to carry out a valid scientific investigation?
Key Learning Statement: A valid scientific investigation uses prior knowledge, observations, and empirical evidence to test a hypothesis and draw conclusions that must be validated through repetition and replication.
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