This is Lesson 6 in the Teacher's Manual (pages 116-127).
Show chicken bones & let kids touch them.
Together, discuss the answers to these questions:
Use Proscopes to examine soup bone cross-sections. Record observations (and a photograph with the Proscope) in a blog entry entitled, "A cross-section of a bone." Remind them of the apple lesson - push yourself to find good observations.
Have students Google the following and summarize the answer in their blog entry, "How does vinegar remove calcium from bones?"
Answer the following reflection questions as well (researching the answers in encouraged):
Bones are made up of unique cells important to movement. To produce energy and function properly, all cells need a constant supply of oxygen, nutrients, and water.