Warm-Up Cell Theory
Transcript of Warm-Up Cell Theory
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Warm-Up Cell Theory
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Words to Know
Write the letter of the definition next to the matching word as you work through the lesson. You may use the glossary to help you.
microscopic A. the process of making something look larger by using a microscope
lens B. so small that it can only be seen with a microscope
magnification C. an instrument used to see things that are too small to see with the naked eye
microscope D. a curved piece of glass or other transparent material that is used to focus light rays
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Lesson Goals
Describe the cell theory.
Identify the three components of the cell
theory.
Analyze the contributions of different
of the cell theory.
scientists to the
Lesson Question
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Warm-Up Cell Theory
Cells
• Cells make up all living things.
• organisms
• Multicellular organisms
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Instruction Cell Theory
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Magnification
• The process of making something look larger by using a is called magnification.
• Magnification is achieved through the use of at least one .
• A lens is a curved piece of glass or other transparent material that is used to focus light rays.
Microscopes
• Most cells are microscopic, so they need to be observed using a microscope.
• A microscope is used to see things that are too to see with the naked eye.
The First “Microscope”
• In 1590, Hans and Zacharias Janssen created the first microscope.
• The microscope was made of three tubes.
• The two end tubes had lenses that worked together to make things look larger.
Robert Hooke
In , Robert Hooke was the first to observe “cells” using a microscope.
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Cell Theory
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The Birth of the Word “Cell”
• Robert Hooke was the first to use the word “ .”
Instruction
Anton van Leeuwenhoek
In , Anton van Leeuwenhoek observed small organisms, which he
called “ ,” by using his version of a .
Matthias Schleiden
In 1838, Matthias Schleiden concluded that are made of cells.
Theodor Schwann
• In 1839, Theodor Schwann believed that:
• are also made of cells.
• the cell is responsible for making up the organism and making the
organism .
Rudolf Virchow
In 1855, Rudolf Virchow confirmed that must come from other pre-existing cells.
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Instruction Cell Theory
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The Cell Theory
All living things are made of cells.
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• Protozoan
• Fungi and plants
• Animals
• Cells are the basic unit of and of all living things.
• Cells are the part of a living thing that is alive and keeps the
organism alive.
• All cells come from other cells.
• Cells are damaged or , so they need replacing.
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Summary Cell Theory
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Review: Development of the Cell Theory
Matthias Schleidenconcluded that
1855Virchow confirmedthat cells comefrom other cells.
1676Anton vanLeeuwenhoekobserved“animalcules” byusing a microscopewith a polishedlens.
1600 1650 1750 1900
1650Robert Hooke wasthe first to use theword “cell.”
1700 1800 1850are made of cells.
Theodor Schwannbelieved thatanimals are madeof cells and thatcells make uporganisms andmake organismswork.
Hans andZachariasJanssencreated the first
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Answer
Lesson Question What is the cell theory?
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Summary Cell Theory
Review: Key Concepts
• The cell theory
• All things are made of cells.
• The cell is the basic structure and function of living things.
• All cells come from other cells.
2Slide
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