February 28th, 2017 Hiroshima by: John Hersey

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Directions: ANSWER USING COMPLETE SENTENCES! Use the information you have been given to answer questions about: The Skeletal System: What bones are made of.

*To improve your MATH SKILLS spend at least 20 minutes practicing them using IXL.COM. (REMEMBER TO ENTER YOUR USER NAME AND PASSWORD WHEN LOGGING ON! THAT WILL BE PROOF THAT YOU DID IT!

Level #1

Bones are made of both 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. Name the two types of materials that bones are made of.





2. List the three types of cells that make up the living materials of bones.





3. What makes up one-third of bones?







Level #2

Bones are made of both 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 phosphorous. The skeleton of an unborn baby is made of cartilage. This tissue is tough but flexible.

1. Name the two types of materials that bones are made of.





2. List the three types of cells that make up the living materials of bones.





3. What makes up two-thirds of bones?





4. Describe the skeleton of an unborn baby.








Level #3

Bones are made of both 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 phosphorous. The skeleton of an unborn baby is made of cartilage. This tissue is tough but flexible. As an unborn baby 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. Describe the materials that bones are made of.





2. Explain the nature of the two materials that bones are made of.






3. Explain what the skeleton of an unborn baby is made of, the nature of the tissue that makes up its skeleton, and what happens to the tissue as an unborn baby develops.









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