Do Now… Survey Survey Create title page in journal Create title page in journal

Chemistry Test Reflection On a note-card answer the following questions 1. How long did you study for the Chemistry test? 2. I think this amount of studying was: a) just right! b) probably okay c) not enough 3. What method did you use to study? 4. I think I will score an __________ (grade) on the test. 5. What are 2 to 3 strategies you will use to support or improve your learning for the next unit? JOURNAL ENTRY Title Page: Chemistry of Life Title Page: Chemistry of Life Add title, pictures, etc that make this page unique for you Add title, pictures, etc that make this page unique for you Add this to your journal Table of Contents Add this to your journal Table of Contents

Take Survey

What do you know about cells? Types Cells Questions? Parts Name: __________________________Period:_____________ What are they? Where are they found? How small are they Different types of cells What would you like to learn about cells? Different parts of cells

Group Brainstorm: What is true of all living things? Make a compact, summarized list in journal. What is true of all living things? Make a compact, summarized list in journal. What is true about all cells? Write your thoughts in your journal. What is true about all cells? Write your thoughts in your journal.

POD Get new books Get new books Start new section in journal Start new section in journal Use book to build background knowledge of history of the cell Use book to build background knowledge of history of the cell Answer some questions Answer some questions GOALS GOALS Understand who contributed to discovery of the cell Explain how each type of microscope contributed to knowledge of cells How has knowledge of cell impacted our life today?

How cool are microscopes? What world have they unleashed? What world have they unleashed?

Magnification: X 500 The long, thin fibers you see here are really elongated cells of the pine tree. The trees are cut down, chipped up and pounded to separate the fibers from the rest of the tree material.

Magnification: X 35 At a glance, this stuff appears to stick as if by magic. However, magnified 35 times, it is easy to see where the stick comes from. One side contains the hooks (left side), the other has the loops that catch on the hooks.

Magnification: X 35 Common everyday items take on a new dimension at high magnification. In this photo, a staple is seen where it ripped through the fibers of a yellow sticky note paper.

Magnification: X 1,000 These tiny glass capsules contain a liquid scent and are glued onto paper. When the paper is scratched, some of the capsules are ruptured and the scent is released.

Magnification: X 75 The mineral salt has a cubic crystal shape. This grain of kosher salt is composed of many cubes stuck together. With its large surface area, it can absorb more moisture than a similar sized cubic salt crystal. This makes it ideal for curing meats, which involves absorbing blood from the raw meat.

Magnification: X 35 The bristles of this mascara brush are covered with dried mascara and flakes of skin.

Mold in My Shower I found this growing in the corner of my shower. It's some kind of mold, which grows easily in damp places. Mold is a fungus and, with enough moisture, can grow on just about any kind of organic matter. This one was mostly black; whitish molds are often called mildew. Many people are finding out they are allergic to molds and mildews.

Book Preview Preview the book Preview the book Read first paragraph together Read first paragraph together In your journal – In your journal – What would you like to know about cells? What would you like to know about cells? What do you think you might learn about cells in this chapter? What do you think you might learn about cells in this chapter?

The Cell Theory The Cell Theory

Some Random Cell Facts The average human being is composed of around 100 Trillion individual cells!!! The average human being is composed of around 100 Trillion individual cells!!! It would take as many as 50 cells to cover the area of a dot on the letter “ i ” It would take as many as 50 cells to cover the area of a dot on the letter “ i ”WOW!!!

Work to do… Create a flow chart showing how the work of the following scientists contributed to scientific understanding of cells Create a flow chart showing how the work of the following scientists contributed to scientific understanding of cells Briefly explain how each type of microscope contributed to knowledge of cells Briefly explain how each type of microscope contributed to knowledge of cells Answer questions #1,2,3 on page 13. Answer questions #1,2,3 on page 13.

Discovery of Cells English Scientist, Robert Hooke, discovered cells while looking at a thin slice of cork English Scientist, Robert Hooke, discovered cells while looking at a thin slice of cork. He described the cells as tiny boxes or a honeycomb He described the cells as tiny boxes or a honeycomb He thought that cells only existed in plants and fungi He thought that cells only existed in plants and fungi

Anton van Leuwenhoek Used a handmade microscope to observe pond scum & discovered single-celled organisms Used a handmade microscope to observe pond scum & discovered single-celled organisms He called them “animalcules” He called them “animalcules” He also observed blood cells from fish, birds, frogs, dogs, and humans He also observed blood cells from fish, birds, frogs, dogs, and humans Therefore, it was known that cells are found in animals as well as plants Therefore, it was known that cells are found in animals as well as plants

Year Gap??? Between the Hooke/Leuwenhoek discoveries and the mid 19 th century, very little cell advancements were made. Between the Hooke/Leuwenhoek discoveries and the mid 19 th century, very little cell advancements were made. This is probably due to the widely accepted, traditional belief in Spontaneous Generation. This is probably due to the widely accepted, traditional belief in Spontaneous Generation. Examples: Examples: -Mice from dirty clothes/corn husks -Maggots from rotting meat

19 th Century Advancement Much doubt existed around Spontaneous Generation Much doubt existed around Spontaneous Generation Conclusively disproved by Louis Pasteur Conclusively disproved by Louis Pasteur Pasteur: Ummm, I don’t think so!!! + = ?

Development of Cell Theory German Botanist, Matthias Schleiden, concluded that all plant parts are made of cells German Botanist, Matthias Schleiden, concluded that all plant parts are made of cells German physiologist, Theodor Schwann, who was a close friend of Schleiden, stated that all animal tissues are composed of cells German physiologist, Theodor Schwann, who was a close friend of Schleiden, stated that all animal tissues are composed of cells.

Development of Cell Theory Rudolf Virchow, German physician, after extensive study of cellular pathology, concluded that cells must arise from preexisting cells Rudolf Virchow, German physician, after extensive study of cellular pathology, concluded that cells must arise from preexisting cells.

The Cell Theory Complete The 3 Basic Components of the Cell Theory were now complete: The 3 Basic Components of the Cell Theory were now complete: 1. All organisms are composed of one or more cells. (Schleiden & Schwann)( ) 1. All organisms are composed of one or more cells. (Schleiden & Schwann)( ) 2. The cell is the basic unit of life in all living things. (Schleiden & Schwann)( ) 2. The cell is the basic unit of life in all living things. (Schleiden & Schwann)( ) 3. All cells are produced by the division of preexisting cells. (Virchow)(1858) 3. All cells are produced by the division of preexisting cells. (Virchow)(1858)

Modern Cell Theory Modern Cell Theory contains 4 statements, in addition to the original Cell Theory: Modern Cell Theory contains 4 statements, in addition to the original Cell Theory: The cell contains hereditary information(DNA) which is passed on from cell to cell during cell division. The cell contains hereditary information(DNA) which is passed on from cell to cell during cell division. All cells are basically the same in chemical composition and metabolic activities. All cells are basically the same in chemical composition and metabolic activities. All basic chemical & physiological functions are carried out inside the cells.(movement, digestion,etc) All basic chemical & physiological functions are carried out inside the cells.(movement, digestion,etc) Cell activity depends on the activities of sub-cellular structures within the cell(organelles, nucleus, plasma membrane) Cell activity depends on the activities of sub-cellular structures within the cell(organelles, nucleus, plasma membrane)

How Has The Cell Theory Been Used? The basic discovered truths about cells, listed in the Cell Theory, are the basis for things such as: The basic discovered truths about cells, listed in the Cell Theory, are the basis for things such as: Disease/Health/Medical Research and Cures(AIDS, Cancer, Vaccines, Cloning, Stem Cell Research, etc.) Disease/Health/Medical Research and Cures(AIDS, Cancer, Vaccines, Cloning, Stem Cell Research, etc.)

Some Parting Thoughts It is amazing to think that the cells that make up our bodies are just as alive as we are. Humans are just an intricately designed community of cells, which must work together to survive. It is amazing to think that the cells that make up our bodies are just as alive as we are. Humans are just an intricately designed community of cells, which must work together to survive. Cells, in my opinion, are one example of true intricate design in nature Cells, in my opinion, are one example of true intricate design in nature

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