The document discusses the student's thoughts on how to help polar bears survive the melting Arctic ice. The student notes that polar bears need ice to live on as they cannot stay in water for long periods. However, the student is unsure of how to specifically help the polar bears given the loss of their sea ice habitat.

1. 7th Science Period 7 9/12/2012 10:23:00 AM
Problem: The Arctic’s ice is melting
Question: How can I help the polar bears survive.?
My Thoughts: I would like to help the polar bear’s but I don’t now how. The
polar bears need ice because they cant be in water for a long time.

2. Cells 9/12/2012 10:23:00 AM
Cells are the smallest unit of life
Characteristics of life
-Organized
-the ability to grow and develop
-the ability respond to the enviroment
-the ability to reproduce
Needs of life
-Energy
-Material (water. oxigen, carbon dioxide, nitrogen)
-Living Space
Scientist that contributed to our understanding of cells
Hooke-
Leuwenhoek-
Pasteur-He made his own cell theory
Schwann-By reconizing the cell as the basic unit of animal structure.
Schleiden- he discovered that all animals are composed of their own cells.
Virchow-He found out that diseases involve changes in normal cells

3. 9/12/2012 10:23:00 AM