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2. Romans When Romans discovered they were able to make glass in the 1 st century BC, things changed for the better! Anton Van Leeuwenhoek He figured how to grind glass together and decided to experiment. Leeuwenhoek made his own 270x magnification compound microscope! Today, microscopes magnifications range from 200x-10,000,000x magnification. What is a Theory? A set of principles developed over time via multiple investigations. The discovery of the cell was made through the invention of the microscope between 1665-1838. © Copyright 2015 – All rights reserved. www.cpalms.orgwww.cpalms.org

3. DAY 1 CELL THEORY There are 3 major parts of the cell theory: 1.All organisms are made of cells. 2.All existing cells are produced by other living cells. 3.The cell is the most basic unit of life. © Copyright 2015 – All rights reserved. www.cpalms.orgwww.cpalms.org

4. CONTRIBUTORS There are 5 contributors to the cell theory: 1.Robert Hooke 2.Anton van Leeuwenhoek 3.Matthias Schleiden 4.Theodor Schwann 5.Rudolf Virchow Each of the above contributors produced evidence through investigations and experiments that led to today’s cell theory! © Copyright 2015 – All rights reserved. www.cpalms.orgwww.cpalms.org

5. HOME LEARNING Review all notes taken in your interactive notebook in class today! © Copyright 2015 – All rights reserved. www.cpalms.orgwww.cpalms.org

6. DAY 2 BELL-RINGER ! 1. The cell theory is composed of how many parts? 2. How many contributors help compile today’s cell theory? © Copyright 2015 – All rights reserved. www.cpalms.orgwww.cpalms.org

7. ROBERT HOOKE English Scientist o Used the compound microscope to observe cork. o Hooke observed that cork is composed of small, hollow compartments. o The parts prompted Hooke to think of small rooms (cells) in a monastery, so he gave them the same name: CELLS. o Investigated cork through experimenting with the compound microscope and came up with the name cells ! Key Note: Hooke discovered the cell in 1665, which started formulating the cell theory! https://en.wikipedia.org/ wiki/Robert_Hooke © Copyright 2015 – All rights reserved. www.cpalms.orgwww.cpalms.org

8. CORK https://commons.wikimedia.org/wiki /File:Cork_oak_trunk_section.jpg © Copyright 2015 – All rights reserved. www.cpalms.orgwww.cpalms.org

9. MONASTERY © Copyright 2015 – All rights reserved. www.cpalms.orgwww.cpalms.org

10. HOOKE’S INVESTIGATION/EXPERIMENT Hooke’s ObservationsHooke’s Microscope https://en.wikipedia.org/wiki/Robert_Hooke © Copyright 2015 – All rights reserved. www.cpalms.orgwww.cpalms.org

11. ANTON VAN LEEUWENHOEK Dutch Tradesman o Study new approaches for creating lenses to observe cloth. o Leeuwenhoek’s microscope was more powerful than Hooke’s compound microscope. o From investigating and experimenting with his microscope, Leeuwenhoek became one of the first scientists to refer to living cells when he observed an abundant number of single-celled organisms, which he called animalcules (plant & animal), swimming in a drop of pond water! © Copyright 2015 – All rights reserved. www.cpalms.orgwww.cpalms.org

12. LEEUWENHOEK’S INVESTIGATIONS/EXPERIMENT Leeuwenhoek’s Observations Leeuwenhoek’s Microscope © Copyright 2015 – All rights reserved. www.cpalms.orgwww.cpalms.org

13. MATTHIAS SCHLEIDEN German Scientist o Fascinated with plant cells, Schleiden used the compound microscope and studied plant cells. o From investigating and experimenting with plants, projected plant parts are made of cells! o Discussed what he observed with his dear friend, German scientist Theodor Schwann. © Copyright 2015 – All rights reserved. www.cpalms.orgwww.cpalms.org

14. THEODOR SCHWANN German Scientist o Studied plant & animal cells, and was intrigued by the similarities between the two. o From investigating and experimenting with plant & animal cells, Schwann was able to determine that all animals are made of cells! o Schwann published the 1 st statement of the cell theory: all living things are made of cells and cell products! © Copyright 2015 – All rights reserved. www.cpalms.orgwww.cpalms.org

15. RUDOLF VIRCHOW o Based on his investigations and experiments, he stated that all cells come from preexisting cells, which is the 2 nd part of the cell theory: all existing cells are produced by other living cells! Key Note: After Virchow’s completed his work, the cell theory was finally formulated in 1838! © Copyright 2015 – All rights reserved. www.cpalms.orgwww.cpalms.org

16. RECAP Cell Theory There are 3 major parts of the cell theory: 1.All organisms are made of cells. 2.All existing cells are produced by other living cells. 3. The cell is the most basic unit of life. These three parts were discovered between 1665- 1838. Contributors There are 5 contributors to the cell theory: 1.Robert Hooke 2.Anton van Leeuwenhoek 3.Matthias Schleiden 4.Theodor Schwann 5.Rudolf Virchow Eye- Catchers Robert Hooke o came up with the name cells Anton Van Leeuwenhoek o referred to living cells called animalcules (plant & animal) after observing a drop of pond water Matthias Schleiden o projected plant cells are made of cells Theodor Schwann o determined all animals are made of cells (1 st statement of the cell theory) Rudolf Virchow o stated all cells come from preexisting cells (2 nd statement of the cell theory) Key Note: It took over 173 years for the cell THEORY to be formulated, wow! © Copyright 2015 – All rights reserved. www.cpalms.orgwww.cpalms.org

17. DAY 2 EXIT TICKET 1. Name the 3 major parts of the cell theory. 2. Name the 5 contributors of the cell theory. The wacky history of cell theory - Lauren Royal-WoodsThe wacky history of cell theory - Lauren Royal-Woods (TED-Ed) © Copyright 2015 – All rights reserved. www.cpalms.orgwww.cpalms.org