9/28/2017

Pros and cons of limiting family size

In instances such as China’s one child policy, the effect of limiting family size has a bad connotation. The effect of having the policy has many lasting effects that could last for decades such as low fertility rate,gender imbalance and caring for an aging population. These effects may be enough to throw many countries off this idea and may hurt China in the long run. The pros of limiting family size are limited, but valuable. The policy, placed in 1979, was in effort to slow China’s rapid population growth. This has in turn made China’s population smaller and grow at a reasonable rate. The tfr (total fertility rate) has decreased exponentially from 2.7 per woman in 1980 to 1.7 in 2011. However, the gender ratio is now skewed as well, being 117 boy to 100 girls by 2001. China has already begun repealing this law and are now trying to recover from the large population growth in males. They will also have to try and recover from their massive population loss and inequality in age in the population. Overall, the one child policy seems to have more cons than pros and tends to hurt many people and families.

Chloe Walsh

Planning the Platforms

Problem Statement: In this POW we must find two formulas for Camilla, one for the height of the highest platform and the other for how much cloth she needs. These will help with the overall POW and help us come to a conclusion.

Process:

To figure out an equation for how much cloth she needs for her clothing we must use the sigma sign. This represents how many times you need to add a certain equation together, determined by the number on top of the sigma.h+(x-1)d + h+(x-1)d this represents the equation model we used, x representing the pillar you are on.

To find how tall the highest platform needs to be, represented in the second picture, you take the number of pillars and subtract one from it. Then you multiply it by the distance between the platforms which is always the same. Then you multiply it by the height of the first platform.

Solution:

Ribbon- h +(x-1)d

Pillar- h +(d(x-1))

Evaluation:

This POW has probably been my favorite as the solution to the problem took a while to find, but is very clear.

Self Assessment:

Although I was gone all the days we worked on this POW I still feel I did a good job and got solutions with the help of my peers.

2. I'm proud of these two POW's because I believe they were both completed correctly and were organized well. These POW's were enjoyable as they were a little complex to figure out, however, with help were pretty easy to understand and solve.

Silverton Lab Writeup

Claire Bedford & Chloe Walsh

Introduction/Task Statement:

On October 12, 2017, the junior class at Animas High School went to Silverton in order to investigate water quality. Students were separated into groups of three, Chloe being with Lydia and Megan and Claire with Baylee, Janey and Saige. Both of us worked at Cement Creek at 1:20-2:30PM, being some of the last students to take samples and test the water. In these groups, we investigated three streams that come together to create the Animas river and determined acidity of the creek (pH), how well the stream conducts electricity (conductivity), how warm or cold it is in degrees celsius (temperature), how clear the water in the stream is (turbidity), and how fast the water flows in cubic feet per second (discharge). We recorded the collected data on a printed paper before entering it into Google sheets and creating a pivot table. The pivot table calculated the average, maximum, minimum, range, median, standard deviation, and weighted average. Average is calculated when you add all of the values together then divide by the total numbers in the data set. The average is the central number in a set of data. Maximum and minimum are the largest and smallest numbers in the data set. Range can then be used by subtracting the maximum from the minimum and finding the difference. Median is the number that is in the middle of the data set when ordered chronologically. Standard deviation and weighted average are more advanced measurements. Standard deviation is calculated by taking each number, adding it to the average and squaring it then finding the average of all the numbers together before taking the square root of that newly calculated average. Weighted average is a calculated average where the numbers in the data set contribute a set amount to the average. You calculate weighted average by multiplying the number by the percent it contributes then adding all the numbers up. These measurements are important because they all give you values that can be useful in different ways. We calculated these things because they are what determine water quality accurately and also what the USGS calculates and we compared our recorded data to the data they recorded and put on their website to determine accuracy.

Visual Representation:

Predicted Values and Data Values Collected

Student Predictions

USGS Data

pH

5.55

6.9

Discharge

45.79 ft/s

103 ft/s

Temperature

7.02 Degrees Celsius

4 Degrees Celsius

Conductivity

1,999.3

514

Table 1: The predicted values of the Animas River and USGS website data

Difference Between USGS Data Value Predicted Value

pH

-1.35

Discharge

-57.21 ft/s

Temperature

-3 degrees celsius

Conductivity

-1,485.3

Table 2: The difference between the predicted values of the Animas River and USGS website data

Table 3: Recorded data values of temperature, pH, dissolved oxygen, turbidity, conductivity, and streamflow recorded by Animas High School students

4.

I met most of my goals for this semester, to not get any failing grades and A's and B's. This semester I mostly struggled with chemistry and psychology and my other core classes were solid. I've definitely changed as an individual as coming to Animas was a big change for me and I had to get used to being with people my age. At the beginning of the semester, I was struggling mostly socially but then it completely flip flopped to where I was only paying attention to my social life and not academics. After that, I realized my mistake and started trying harder,stressing myself out, which eventually triggered my major depressive disorder to have a low for a few weeks which was misfortunate for my grades especially. Next semester I hope to focus on school and myself instead of everyone else.

Temperature

pH

Conductivity

Discharge (Streamflow)

Median

9.5

3.67

983.5

30.57

6.9

7.04

427

46

4.7

6.3

313

24.4

Total Average

6.95

5.5

699.5

26.44

Average

9.48

3.62

989

28.94

6.88

7.05

427

49.97

4.72

6.35

310

20.6

Total Average

7.18

5.55

664.13

32.75

Standard Deviation

.23

.12

21.24

7.88

.13

.05

N/A

25.53

.18

1.13

7

6.66

Total Average

2.05

1.67

349.71

18.16

Min & Max

9.1 - 9.8

3.45 - 3.7

972 - 1017

19 - 35.62

6.7 - 7

7 - 7.1

427 - 427

26.65 - 77.25

4.5 - 4.9

5.27 - 7.52

302 - 315

12.91 - 24.49

Total Average

4.5 - 9.8

3.45 - 7.52

302 - 1017

12.91 - 77.25

Key:

Cement Creek

Mineral Creek

Upper Animas

Table 4: Pivot table representing the median, average, standard deviation, minimum, and maximum of all three creeks.