Evolution: Human Height

Guiding Question: How do eighth graders vary in standing and sitting height?

Hypothesis: I think the females are naturally shorter than males also i think that based on a person’s age the height will vary.

Materials:
- measuring tape
- 8th graders
- chair

Variables: I will keep the people I’m measuring the same-all 8th grade students, but i will change the position they are in for example I will measure them standing and I will measure them sitting.

Person

Standing Height (cm)

Sitting Height (cm)

Skeletal Index

Brachyskelia, Mesoskelia, Makroskelia

Emily	166 cm	80cm	48.19	Brachyskelia
#Ergi	173 cm	88	50.86	Brachyskelia
Jovana	184 cm	97 cm	52.71	Mesoskelia
Eliza	155 cm	76 cm	49.03	Brachyskelia
Abe	171 cm	89	52.04	Mesoskelia
Riena	157 cm	84 cm	53.50	Macroskelia
Maria	177 cm	91 cm	51.41	Mesoskelia
Luka L.	183 cm	84 cm	45.90	Brachyskelia
Luka J.	182 cm	91 cm	50.00	Brachyskelia
Caroline	157 cm	82 cm	52.22	Mesoskelia
Magda	162 cm	82 cm	50.61	Brachyskelia
Cassie	167 cm	82.5	49.40	Brachyskelia
Dijana	165 cm	87 cm	52.72	Mesoskelia
Brin	176 cm	84 cm	50	Brachyskelia
Rafa	170 cm	85 cm	50	Brachyskelia
Aleksej	177 cm	87 cm	49.15	Brachyskelia
Monica	160 cm	81 cm	50.62	Brachyskelia
Philipp	180 cm	91 cm	50.55	Brachyskelia
Roy	172 cm	86 cm	47.77	Brachyskelia
Viktor	190 cm	94 cm	49.47	Brachyskelia
Jude	180 cm	90 cm	50	Brachyskelia
David	176 cm	87 cm	49.43	Brachyskelia
Teodora	172 cm	83 cm	48.25	Brachyskelia
Jacob	162 cm	82 cm	50.61	Brachyskelia
Marko	179 cm	86 cm	48.04	Brachyskelia
Nikola	158 cm	80 cm	50.63	Brachyskelia

Data Analysis: From looking at these results I found that the average female 8th graders skeletal index in our school is 50.78. From looking at the results of the males in 8th grade the average skeletal index for them is 49.63. Also by looking at my table I noticed that most people’s skeletal index is under the category of Brachyskelia meaning that their bottom half is longer than their torso. There were three people who are mesoskelia, and only one person, Riena, is macroskelia meaning that her bottom half/her legs are shorter than her torso. I also found the general height of the males and females in this grade. So for females the average height is, 165.63. Then for males the average height I found is 175.26. So males are on average taller.

Conclusion: From looking at my data I was able to conclude that girls have a larger skeletal idex that boys do in 8th grade. And then not unusually the boys average height is much taller than the girls the boys are on average taller by about 10 cm. I also find it very interesting that nearly everybody males and females are generally brachyskelia.

Further Inquiry: I think it would be interesting to measure the arm span of people to see if their arm span was proportional to their body. My estimation would be that the arm span would be shorter or the same length as the body.