7th Grade Science

Crime

video- observations link

Day 1 http://forensics.rice.edu/en/For-Educators/

Day 2 Timeline of fingerprinting

http://www.softschools.com/timelines/history_of_fingerprinting_timeline/287/

Activity 1: All about fingerprints

Fingerprint Principles

According to criminal investigators, fingerprints follow 3 fundamental principles:

A fingerprint is an individual characteristic; no two people have been found with the exact same fingerprint pattern.

A fingerprint pattern will remain unchanged for the life of an individual; however, the print itself may change due to permanent scars and diseases.

Fingerprints have general characteristic ridge patterns that allow them to be systematically identified.

Get a copy of the fingerprint basics student handout from below or from the teacher.

Open the fingerprint basics teacher below and complete the handout

Activity 2: On the back of your basics sheet make a print of each of your fingers using a stamp pad, or cover them in marker and print while it is wet.

A third option is to rub your pencil on a piece of paper and stick your finger on it. Then press down on the paper.

Label each print according to the category that it belongs to.

Activity 3: Lift a Print Lab

Activity 4: Test for fingerprints https://web.archive.org/web/20160403170123/http://www.azafis.gov/TestYourSkillsPart1PatternIdentification.asp

Activity 5: Comparison quiz https://web.archive.org/web/20160405191833/http://www.azafis.gov/TestYourSkillsPart2PrintComparison.asp

Activity 6: game https://web.archive.org/web/20131226061738/http://www.trutv.com/shows/forensic_files/games/fingerprint/index.html

These next two challenges you will need to put your answers on a separate piece of paper and then check the answers at the bottom

Test for fingerprints https://web.archive.org/web/20160403170123/http://www.azafis.gov/TestYourSkillsPart1PatternIdentification.asp

Comparison quiz https://web.archive.org/web/20160405191833/http://www.azafis.gov/TestYourSkillsPart2PrintComparison.asp

Link to online https://docs.google.com/document/d/1Bx-YwV-k4iN7nI6Ok7uLZi8vlXyrKzEa9WHtqpeTCyw/edit?usp=sharing

Day 3 DNA

video link

Nearpod for basics

activity link

Learn how to process DNA https://www.pbs.org/wgbh/nova/education/body/create-dna-fingerprint.html

Day 4 Bones

Facial reconstruction https://www.youtube.com/watch?v=FxVM9upcizs

second video https://www.youtube.com/watch?v=env_3T3sFSg

Activity 1- pelvic differences watch the video and write down three differences between male and female pelvic girdles

https://www.youtube.com/watch?v=I1Qm7d4cCt8

Activity 2 skull differences- look at the picture below- Give me three differences between each of the three female skulls.

Give me three differences between the male skulls

Give me one differences between the female and the male skulls of each race.

Activity 3- How the environment effects our skeletal growth- https://naturalhistory.si.edu/education/teaching-resources/social-studies/how-bones-reveal-environmental-health

Explain how the environment can effect skeletal growth

Day 5- Measuring bones

Growth plates- What Is a Growth Plate?

Growth plates are the areas of new bone growth in children and teens. They're made up of cartilage , a rubbery, flexible material (the nose, for instance, is made of cartilage) .Most growth plates are near the ends of long bones. Long bones are bones that are longer than they are wide. They include:

the femur (thighbone)
the lower legs (tibia and fibula)
the forearm (radius and ulna)
the bones in the hands and feet

What Does A Growth Plate Do?

Growth plates are one way bones grow. There are usually two growth plates in each long bone. They add length and width to the bone.As kids grow, the growth plates harden into solid bone. A growth plate that has completely hardened into solid bone is a closed growth plate. After a growth plate closes, the bones are no longer growing.

When Do Growth Plates Close? Growth plates usually close near the end of puberty. For girls, this usually is when they're 13–15; for boys, it's when they're 15–17.

Another thing a skeleton can tell you is the approximate height. Approximate height can be determined by measurements of the bones. The best way to find approximate height is to measure the femur, which is the bone that runs from your hip to your knee. It is helpful to know the sex of the person because this factor affects the calculation of height.

To calculate the estimated height based on the person’s femur, first measure the femur in centimetres. If the subject is female, multiply the length by 2.47 and add 54.1 to arrive at the approximate height. If the subject is male, multiply by 2.32 and add 65.53. These calculations are accurate to within five centimetres.

Another common bone used to estimate height is the humerus. For this bone, the calculations are slightly different. For a female subject, multiply the length in centimetres by 3.08 and add 64.67. For a male subject, multiply the length by 2.89 and add 78.1. Again, these calculations are accurate to within five centimetres of the subject’s height.

Female height= ( femur length) x 2.47 + 54.1

male height= ( femur length) x 2.32 + 65.53

Convert cm to inches:Multiply your centimeters value by 0.39370.

http://anthropology.si.edu/writteninbone/facial_reconstruction.html

video https://www.youtube.com/watch?v=6G0LvImAGAg

Day 6 blood splatter

https://www.youtube.com/watch?v=qFR6JvVJk6o

Notes link

Day 7 Autopsies