# Lengthy Relationship Biology Lab Report Template

Name_____________________________________
Per.____
Date___________
LENGTHY RELATIONSHIPS
INTRODUCTION
Look around at people's feet. You will notice that some people have longer feet than others. Do the individuals
with longer feet also have longer legs? Are people with longer legs taller? Are the number of strides a person
takes in a given distance different when he/she is running or walking? Does the person's stride length change
with speed? Would the same hold true for birds? For dinosaurs? For early hominins? Can patterns of the
present give you clues to patterns in the past?
Your job is to answer the following questions using the following lab procedures. You will gather data from
classmates and family members to determine if there is a relationship between foot length, leg length, and
height. You will also measure your stride while walking and running.
Use the following terms when taking your measurements:
foot length: distance from back of heel to toe tip (without shoe).
leg length: distance from the base of the heel (calcaneus) to the hip joint (acetabulum).
hip Joint: top of femur on the outside of the hip joint (To find this spot, lift your knee until your thigh is
parallel to the floor. Feel for the hip joint in your buttocks area, put your leg down, and measure from
that point to the floor.)
height: distance from floor to the top of the head (without shoes on).
stride length: usually the distance from the back of the heel of one footprint to the back of the heel of the next
footprint of that same foot; in other words, the distance of TWO steps.
pace length: distance from back of heal print of one foot to the back of heal print of the other foot in one step.
Measure left-to-right pace, and right-to-left pace; those distances are often different.
OBJECTIVES: To find the relationships between:
A. Foot Length and Leg Length
B. Foot Length and Height
C. Leg Length and Height
D. Stride Length and Leg Length
E. Stride Length and Speed
MATERIALS
Meter Stick, Data Table, Graph Paper
PROCEDURES
Part A
1. In your lab group, gather the following data from each member and record them in your Data Table 1:
foot length, leg length, height (all measurements must be in centimeters)
2. Calculate the ratio of foot length (F) to leg length (L) for each group member and record in Data Table 1.
3. Calculate the ratio of foot length (F) to leg length (L) for each lab member and record in Data Table 1.
4. For homework, collect the above data from a minimum of three family members and/or friends.
5. Plot your data on a graph. Do this by placing foot lengths on the x axis, and leg lengths on the y axis; for
each person, find where that person’s foot length and leg length coincide in the graph, and place a clear dot
there. When done, you will see a scattering of dots suggesting a correlation, and they will likely follow a fairly
straight path; draw a straight line through the middle of that path of dots.