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Cell Theory Graphic Organizer Activity

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CELL THEORY
& THE DISCOVERY OF CELLS
Graphic Organizer Activity
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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
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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
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