December 17th, 2015 To Kill A Mockingbird by: Harper Lee

Name: ___________________________________

Date: _____________________

Directions: Answer using complete sentences! Use the information you have been given to answer questions about: The five jobs that bones do to help us. Challenge yourself and try the highest level you can!

Subject: The Skeletal System: What Bones are made of!

Level#1: Bones are made of living and nonliving materials. The living materials are bone cells, blood cells, and nerve cells. These cells make up about one-third of bones.

1. What are bones made of?




2. What are the living materials that bones are made of?




3. How much of these cells are our bones made of?





Level#2: Bones are made of living and nonliving materials. The living materials are bone cells, blood cells, and nerve cells. These cells make up about one-third of bones. About two-thirds of bones are made up of nonliving materials, including the minerals calcium and phosphorus. The skeleton of an unborn baby is made of cartilage. This tissue is tough but flexible.

1. What are bones made of?





2. What are the living materials that bones are made of?





3. What are the nonliving materials that bones are made of?




4. What is the skeleton of an unborn baby made of and how would you describe it?







Level#3: Bones are made of living and nonliving materials. The living materials are bone cells, blood cells, and nerve cells. These cells make up about one-third of bones. About two-thirds of bones are made up of nonliving materials, including the minerals calcium and phosphorus. The skeleton of an unborn baby is made of cartilage. This tissue is tough but flexible. As an unborn develops, most of its cartilage skeleton changes to hard bone. The cartilage that is left has many functions. For example, it prevents the ends of bones from rubbing against each other.

1. What two materials are bones made of?






2. Describe both the living and nonliving materials that bones are made of.








3. Describe the skeleton of an unborn baby, what happens to it as the baby develops, and the function of the cartilage that is left.









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