Transcript Cells - WordPress.com

Day 1: Cells
Write each of the words below on your
new do first sheet. Then write “alive” or
“not alive.” You do not need complete
sentences.
Plant
air
animals
wind
bacteria
viruses
protists
rocks
fungi
soil
fire
water
Are these things alive?
Plant Living
air
wind
animals Living
bacteria Living
viruses
protists Living
rocks
fungi Living
soil
fire
water
Notes: Living vs. Non-Living
Ex. of Life and Nonlife:
Living Things: plants, animals, protists,
fungi, bacteria
This is a picture of
Mycobacterium
tuberculosis a bacteria
which causes the disease
tuberculosis. What
happens when you get
this disease?
Nonliving Things: viruses, fire, rocks, soil,
air, water, sunlight
I. KEY CONCEPT
Cells are the basic unit of life. They are the
smallest unit able to perform the basic functions
of life. (Basically the SMALLEST LIVING
THINGS)
7 Characteristics of Living Things
Movement
 Growth & Development
 Sensitivity
 Reproduction
 Use of Energy
 Made of Cells
 Eliminate Waste

Notes: Cell Theory & Microscopes
Who was involved?
(Two of these dudes are our
scientists of the week!)
The cell theory grew from the work and
research of many scientists.
What did they use? (It’s all about
the technology!)
More was learned about cells as
microscopes improved over the years
History of Cells and Microscopes
In the 1600’s compound light microscopes were
invented. These microscopes use a series of
lenses to magnify objects.
(Magnify means to make objects look bigger.)

After the invention of the microscope,
scientists began to look at cells under the
microscope.
Microscopes
Original
Microscope from
1600’s
Compound
light
microscope
used today.
Robert Hooke
Used light microscopes to look at plant tissue
 Noticed that a piece of dead cork had tiny
chambers
 Called them cells because they looked like the
cells of a monastery

Hooke's Microscope
Hooke's drawing of Cork Cells
Anton van Leeuwenhoek
(LAY-vuhn-hook)
One of first people to use a
microscope to study living
things from nature
 Able to see things that no
one had seen before
 First person to see the tiny
organisms living in pond
water

Growth Mindset Quote of the Week
"Whenever I found out anything
remarkable, I have thought it my
duty to put down my discovery on
paper, so that all ingenious
people might be informed
thereof."
Antonie van Leeuwenhoek
Principal # 1
All organisms are made of one or more
cells.
 Some
organisms are made up of one cell
 Others are multicellular or made up of many
cells
Principal # 2
The cell is the most basic unit of life.
Principal # 3
All existing cells are produced by other
living cells.
These scientists’ studies led to the
development of the cell theory!
A theory is a well tested hypothesis that can
explain a broad range of observations
 The cell theory applies to all living things BIG and
small and has three main principals
 Cells can provide a lot of information about living
things

The Wacky History of Cell Theory

https://www.youtube.com/watch?v=4OpB
ylwH9DU
Other important Scientists
C. Matthias Schleiden (SHLY-dun)
 All
plants are made of cells
D. Theodor Schwann
 All
animals are made of cells
E. Rudolf Virchow
 Looked
at how cells reproduce
 Cells come from cells that already exist
History of Cells and Microscopes
-In the 1930’s electron light
microscopes were invented
which allowed scientists to
look at even smaller objects,
such as organelles.
II. Cell Theory Summary
-In the 1830’s something called the “Cell Theory” became a popular
way of describing life in terms of cells.
-The cell theory is made up of three main ideas:
1. All organisms are composed of one or more cells. An
organism may be made up of one cell, such as bacteria, or
may be multicellular, that is have many cells, such as plants
and animals.
2. The cell is the basic unit of structure and organization
or organisms. Although organisms such as humans, dogs and
trees can become very large and complex, the cell remains
the simplest, most basic part of an organism.
3. All cells come from preexisting cells. This means that a
cell comes from a parent cell (one parent cell divides to
become two daughter cells).