Rational Me. A Math 6 Pre-AP Project

Transcription

1 Rational Me A Math 6 Pre-AP Project

2 Our bodies are mostly made of 6 elements We also have 1.5% of trace elements 65% Oxygen 18% 10% 3% 1.5% Carbon Hydrogen Nitrogen Calcium 1% Phosphorus

3 Rational Me: Project Task I Pick up a Rational Me Project Sheet First, record your weight. Review your chart. It will have five columns and 8 rows. Column one: List the elements Column two: Percent of elements in humans If you don t want to use your own weight, ask a sibling or make up a weight. Please do not use pounds. Column three: convert element percents to decimals Column four: amount of element in your body based on weight (or weight of another person) in pounds (round to the nearest whole number). Column five: fraction form of amount of weight (element/total weight)

4 Question: How do we find the decimal form of an element? DIVIDE THE PERCENT FORM OF THE ELEMENT BY Example: Sixty-five percent (65%) of the human body is oxygen. To divide, omit the percent sign and move the decimal point to the left two times. The result: Please note: the decimal forms of the percents have been completed for you. Look at the Sample Chart page.

5 Question: How do we find the amount of an element based on the weight? MULTIPLY THE DECIMAL FORM OF THE ELEMENT BY THE TOTAL WEIGHT Example: Sixty-five percent (65%) of the human body is oxygen. The decimal form of 65% is If a person weighs 85 pounds, multiply 85 pounds by x 0.65 = The product is Round to the nearest whole number, 55. A person who weighs 85 pounds has about 55 pounds of oxygen in his or her body.

6 Question: How do we find the fraction form of the weight? AMOUNT OF ELEMENT IN POUNDS / TOTAL WEIGHT Example: In the previous example, we learned that a person who weighs 85 pounds has about 55 pounds of oxygen in his or her body. To convert to a fraction, the 55 will become the numerator because it is the amount of the element, oxygen, in pounds. The total weight, 85 pounds, will become the denominator. 55/85 is the fraction form ***Do not simplify the fractions

7 Sample Chart (based on pound person) Element Name Percent in body Decimal Form Amount of element in body (pounds) Fraction form (based on weight) Oxygen 65% pounds Carbon 18% pounds Hydrogen 10% pounds Nitrogen 3% pounds Calcium 1.5% pounds Phosphorus 1% pound Trace elements 1.5% pounds or 0 1 or 15 0

8 Rational Me: Project Task II Graphical representations based on the chart How can we represent the amounts of elements we have in our bodies? Exercise your creative side by thinking outside the circle.

9 Pie/Circle Graphs Circle graphs are one way to represent the data in the chart, but what are some other ways you can show how rational you really are? 4th Qtr 9% Chart Title 3rd Qtr 10% 2nd Qtr 23% 1st Qtr 58%

10 What can we learn from the pie graph? First, it shows that the size of the pieces is based on the percent (based on the whole). 1st Qtr 2nd Qtr 3rd Qtr 4th Qtr The pie is an enclosed space that represents %. Different colors highlight the percents. 9% 58% 10% 23%

11 Thinking Outside the Circle What should your graphical representations have? (1) Approximate graphic representation of elements in body on circle graph and body shape. (2) Colorful (3) Creative 10% Hydrogen (10 pounds) 18% Carbon (18 pounds) 3% Nitrogen (3 pounds)

12 Example of Rational Me Graphical Representation

13 Any other questions? me at