CELL THEORY & THE DISCOVERY OF CELLS Graphic Organizer Activity Thank you for choosing this cell theory activity! I sincerely appreciate your interest and trust in my educational resources. I hope these materials prove to be a valuable addition to your learning and teaching experience, fostering a deeper understanding of cell biology. If you have any questions, feedback, or require further assistance, please don't hesitate to reach out. Your support fuels my commitment to create high-quality science resources for teachers like you! HAPPY SCIENCING FROM SCIENCE IS REAL! TABLE OF CONTENTS Cell Theory Graphic Organizer DESCRIPTION Terms of Use Background Reading in Color Background Reading in Black/White Graphic Organizer in Color Graphic Organizer in Black/White Cell Theory Quiz Answer Keys CLICK HERE FOR GOOGLE SLIDES VERSION OF STUDENT HANDOUTS PAGE # 3 4 5 6 7 8 9 – 10 SCIENCE IS REAL Terms Of Use By purchasing this product, you own a license for one teacher only for personal use in their own classroom. Licenses are nontransferable and therefore cannot be passed from one teacher to another. If the teacher who purchased this license leaves the classroom or changes schools, the license and materials leave with that teacher. No part of this resource is to be shared with colleagues or used by an entire team, grade level, school or district without purchasing the correct number of licenses. If you are a coach, principal or district interested in transferable licenses that would accommodate yearly staff changes, please contact me for a transferable license quote at scienceisrealeducation@gmail.com Copyright by Science is Real. Please note - all material included in this resource belongs to Ana Catts. By purchasing, you have a license to use the material, but you do not own the material. You may not claim this work as your own, copy any ideas for commercial use, alter the files, or remove any copyright, images, or water marks. You may not upload any portion of this resource to the internet in any format, including school/personal websites or network drives unless the site is password protected and can only be accessed by students, not other teachers, or anyone else on the internet. Posting of answer keys is prohibited. Please, only post to your site if the access in limited only to your students. You must delete the digital activity from your digital classroom once finished. Disregarding the copyright is a violation of the Digital Millennium Copyright Act and subject to legal action. By purchasing this resource, you agree that the contents are the property of Science Is Real and you have read and understood these Terms of Use. THANK YOU! Thank you! I'm thrilled that you've chosen this resource to be a part of your science classroom. I've put a lot of effort into designing a comprehensive and engaging experience for students, and I hope it brings both enjoyment and knowledge to your students. If you have any questions, feedback, or if there's anything else I can assist you with, please don't hesitate to reach out to me at scienceisrealeducation@gmail.com Your input is incredibly valuable to me as I continually strive to improve my resources. Thank you once again for choosing my science lesson. Wishing you and your students a fantastic learning adventure ahead! Special Thanks to These Incredible Clip Art Artists CONNECT WITH ME! SCIENCE IS REAL Website TPT Store SCIENCE Collaborative Group FB Page BOOM Cards THE DISCOVERY OF CELLS AND THE CELL THEORY (1) All living things are made up or one or more cells. Cells are the fundamental building blocks of life, serving as the smallest functional units within living organisms. Unicellular organisms, such as bacteria and amoebas, are made up of one cell. Multicellular organisms, like humans, bananas, and bears, are made up of many cells. (2) Cells are so incredibly small that they are observed using a microscope. Microscopes are tools with lenses that magnify small objects. The most common microscope found in a classroom is called a compound light microscope. The invention of the compound light microscope allowed scientists to discover cells. microscope (3) Robert Hooke was the first person to discover cells in 1665. He used a very simple microscope and observed a specimen of dead cork plant cells. Through the microscope, Hooke noticed several tiny little boxes nestled next to each other. He thought these compartment-like boxes looked like small rooms in a monastery, much like modern jail cells. This led him to call these boxes “cells”. (4) Although Robert Hooke had discovered the cell, scientists still did not know what living cells looked like. It wasn’t until 1674, when Anton van Leeuwenhoek used a small homemade microscope and made the first observations of unicellular organisms. He observed protozoan cells moving in pond water samples and bacteria in his own dental scrapings. He called these moving cells “animalcules”, Hooke’s meaning “small animals”. Leeuwenhoek also improved the microscope and laid the foundation for microbiology; earning himself the title microscope as the father of microbiology. (5) Scientists still did not know exactly how cells related to organisms or how cells came into existence. In 1838, one-hundred years after Leeuwenhoek’s discovery, botanist Matthias Schleiden, made the first public scientific statement about cells. He declared that all plant tissue is made of cells and that cells are the basic building blocks of all plants. One year later, another botanist, Theodor Schwann added to Schleiden’s claim, and proposed that animal tissue was also composed of cells. Through his research, Schwann was the first to make the connection between living organisms and cells. He stated that one or more cells make up all organisms, and that cells are the basic unit of structure for all life. Leeuwenhoek’s microscope (6) Even after previous discoveries, scientists still did not know where cells came from. In 1855, Rudolf Virchow added to past scientists’ claims and stated that all cells develop from pre-existing cells. Walter Flemming, a German biologist, also contributed to the understanding of cells. In 1878, Walter Flemming discovered that cells reproduce by a process of cell division that he called mitosis. (7) After many years of testing and discovery, these scientists collaboratively created what we know today as cell theory. The Cell theory explains the fundamental principles of cells and the relationship between cells. It took over two hundred years of scientific investigations and contributions to develop the cell theory. There are three main components to the cell theory. The Three Components of the Cell Theory: 1. All living organisms are composed of one or more cells. 2. The cell is the basic unit of structure and function for all organisms. 3. New cells are created by the division of preexisting cells. animal cell plant cell bacteria cell © Science Is Real THE DISCOVERY OF CELLS AND THE CELL THEORY (1) All living things are made up or one or more cells. Cells are the fundamental building blocks of life, serving as the smallest functional units within living organisms. Unicellular organisms, such as bacteria and amoebas, are made up of one cell. Multicellular organisms, like humans, bananas, and bears, are made up of many cells. (2) Cells are so incredibly small that they are observed using a microscope. Microscopes are tools with lenses that magnify small objects. The most common microscope found in a classroom is called a compound light microscope. The invention of the compound light microscope allowed scientists to discover cells. microscope (3) Robert Hooke was the first person to discover cells in 1665. He used a very simple microscope and observed a specimen of dead cork plant cells. Through the microscope, Hooke noticed several tiny little boxes nestled next to each other. He thought these compartment-like boxes looked like small rooms in a monastery, much like modern jail cells. This led him to call these boxes “cells”. (4) Although Robert Hooke had discovered the cell, scientists still did not know what living cells looked like. It wasn’t until 1674, when Anton van Leeuwenhoek used a small homemade microscope and made the first observations of unicellular organisms. He observed protozoan cells moving in pond water samples and bacteria in his own dental scrapings. He called these moving cells “animalcules”, Hooke’s meaning “small animals”. Leeuwenhoek also improved the microscope and laid the foundation for microbiology; earning himself the title microscope as the father of microbiology. (5) Scientists still did not know exactly how cells related to organisms or how cells came into existence. In 1838, one-hundred years after Leeuwenhoek’s discovery, botanist Matthias Schleiden, made the first public scientific statement about cells. He declared that all plant tissue is made of cells and that cells are the basic building blocks of all plants. One year later, another botanist, Theodor Schwann added to Schleiden’s claim, and proposed that animal tissue was also composed of cells. Through his research, Schwann was the first to make the connection between living organisms and cells. He stated that one or more cells make up all organisms, and that cells are the basic unit of structure for all life. Leeuwenhoek’s microscope (6) Even after previous discoveries, scientists still did not know where cells came from. In 1855, Rudolf Virchow added to past scientists’ claims and stated that all cells develop from pre-existing cells. Walter Flemming, a German biologist, also contributed to the understanding of cells. In 1878, Walter Flemming discovered that cells reproduce by a process of cell division that he called mitosis. (7) After many years of testing and discovery, these scientists collaboratively created what we know today as cell theory. The Cell theory explains the fundamental principles of cells and the relationship between cells. It took over two hundred years of scientific investigations and contributions to develop the cell theory. There are three main components to the cell theory. The Three Components of the Cell Theory: 1. All living organisms are composed of one or more cells. 2. The cell is the basic unit of structure and function for all organisms. 3. New cells are created by the division of pre-existing cells. animal cell plant cell bacteria cell © Science Is Real CELL THEORY GRAPHIC ORGANIZER TIMELINE NAME: MATTIAS SCHLEIDEN ROBERT HOOKE THEODOR SCHWANN 1855 1674 1838 1665 CELL THEORY List and Draw the 3 Components of ANTWON VAN LEEUWENHOEK 1839 RUDOLF VIRCHOW plant cell animal cell © Science Is Real CELL THEORY GRAPHIC ORGANIZER NAME: MATTIAS SCHLEIDEN ROBERT HOOKE THEODOR SCHWANN 1855 1674 1838 1665 CELL THEORY List and Draw the 3 Components of ANTWON VAN LEEUWENHOEK 1839 RUDOLF VIRCHOW plant cell animal cell © Science Is Real Name: CELL THEORY QUIZ 1. What type of scientists were Matthias Schleiden and Theodor Schwann? a. physicists b. botanists c. ecologist d. chemists 7. Which scientist improved the microscope and earned himself the title of the father of microbiology? a. Anton van Leeuwenhoek b. Robert Hooke c. Walter Flemming d. Matthias Schleiden 2. What invention led to the discovery of cells? a. magnifying glass b. telescope c. microscope d. eyeglasses 8. Which of the following is NOT a part of the cell theory? a. All cells come from the division of pre-existing cells. b. The cell is the basic unit of structure and function for all organisms. c. All living organisms are composed of one or more cells. d. All cells contain DNA in their nucleus. 3. Which scientists was the first to state that one or more cells make up organisms and that cells are the basic unit of structure for life? a. Anton van Leeuwenhoek b. Walter Flemming c. Rudolf Virchow d. Theodor Schwann 9. What is mitosis? a. observing cells under a microscope b. the process of cell division c. cells moving under a microscope d. the observation of multicellular organisms Match each scientist with their contribution to the cell theory. 4. What unicellular organisms did Leeuwenhoek find in pond water and his dental scrapings? a. fungi and bacteria b. protozoa and bacteria c. amoebas and carbohydrates d. archaea and protozoa 10. ____Flemming A. Declared that all plant tissue is made of cells and that cells are the basic building blocks of all plants 11. ____Hooke B. Made the first observations of unicellular organisms and called these moving cells animalcules 5. Who was the first person to discover cells? a. Anton van Leeuwenhoek b. Robert Hooke c. Rudolf Virchow d. Theodor Schwann 12. ____Leeuwenhoek C. Discovered that cells reproduce by a process of cell division that he called mitosis 13. ____Schleiden D. Stated that all cells develop from pre-existing cells 14. ____Schwann E. First person to observe cells using a microscope; coined the term “cells” because they reminded him of rooms in a monastery 15. ____Virchow F. Proposed that animal tissue was made of cells; First state that one or more cells make up all organisms © Science Is Real 6. Which scientist was the first propose where all cells come from? a. Matthias Schleiden b. Walter Flemming c. Rudolf Virchow d. Theodor Schwann KEY CELL THEORY GRAPHIC ORGANIZER TIMELINE MATTIAS SCHLEIDEN ROBERT HOOKE • First to conclude that all plants were made of cells. • First to recognize the importance of cells as fundamental units of life. • Discovered cells • First person to use the word cell when describing cork cells under a microscope. THEODOR SCHWANN • Coined the word cell because what he saw appeared like tiny rooms in a monastery. • First to propose that ALL organisms are composed of cells. • Discovered and has a type of nerve cell named after him called Schwann cells. 1855 1674 1838 1665 1839 RUDOLF VIRCHOW ANTWON VAN LEEUWENHOEK CELL THEORY List and Draw the 3 Components of • First to observe and describe single-celled organisms (which he called animalcules) using a microscope • Considered the Father of Microbiology • Studied protozoa in pond water and bacteria in his mouth. • Concluded that all new cells come from the division of existing cells. plant cell All living things are made up of cells. SKETCHES WILL VARY Cells are the basic units of structure and function in living things. New cells are produced from the division of existing cells. SKETCHES WILL VARY SKETCHES WILL VARY animal cell © Science Is Real KEY CELL THEORY QUIZ 1. What type of scientists were Matthias Schleiden and Theodor Schwann? a. physicists b. botanists c. ecologist d. chemists 7. Which scientist improved the microscope and earned himself the title of the father of microbiology? a. Anton van Leeuwenhoek b. Robert Hooke c. Walter Flemming d. Matthias Schleiden 2. What invention led to the discovery of cells? a. magnifying glass b. telescope c. microscope d. eyeglasses 8. Which of the following is NOT a part of the cell theory? a. All cells come from the division of pre-existing cells. b. The cell is the basic unit of structure and function for all organisms. c. All living organisms are composed of one or more cells. d. All cells contain DNA in their nucleus. 3. Which scientists was the first to state that one or more cells make up organisms and that cells are the basic unit of structure for life? a. Anton van Leeuwenhoek b. Walter Flemming c. Rudolf Virchow d. Theodor Schwann 9. What is mitosis? a. observing cells under a microscope b. the process of cell division c. cells moving under a microscope d. the observation of multicellular organisms Match each scientist with their contribution to the cell theory. 4. What unicellular organisms did Leeuwenhoek find in pond water and his dental scrapings? a. fungi and bacteria b. protozoa and bacteria c. amoebas and carbohydrates d. archaea and protozoa C 10. ____Flemming A. Declared that all plant tissue is made of cells and that cells are the basic building blocks of all plants E 11. ____Hooke B. Made the first observations of unicellular organisms and called these moving cells animalcules 5. Who was the first person to discover cells? a. Anton van Leeuwenhoek b. Robert Hooke c. Rudolf Virchow d. Theodor Schwann B 12. ____Leeuwenhoek C. Discovered that cells reproduce by a process of cell division that he called mitosis A 13. ____Schleiden D. Stated that all cells develop from pre-existing cells F 14. ____Schwann E. First person to observe cells using a microscope; coined the term “cells” because they reminded him of rooms in a monastery D 15. ____Virchow F. Proposed that animal tissue was made of cells; First state that one or more cells make up all organisms © Science Is Real 6. Which scientist was the first propose where all cells come from? a. Matthias Schleiden b. Walter Flemming c. Rudolf Virchow d. Theodor Schwann SAVE TIME, AMAZE YOUR ADMINISTRATORS, AND ENGAGE YOUR STUDENTS WITH THIS ALL-INCLUSIVE CELLS BUNDLE! ü Comprehensive Unit Plans ü Pre and Post Assessments with Question Bank ü PowerPoint and Notes ü Webquests and Virtual Labs ü Stations Labs ü Graphic Organizers ü Modeling Cells Lab ü Reading Comprehension ü Projects ü Video Handouts ü Coloring Sheets ü Task Cards NOW 30% OFF REGULAR PRICE SCIENCE