Transcript Living Things - WMLTeamUnited

Monday, March 28, 2016
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Monday, March 28, 2016
What is Life Reading pg.1
In the summer of 1973, thousands of slimy “blobs” appeared
in towns near Dallas, Texas. The jelly-like masses overran
yards and porches all over the towns. They oozed slowly
along the ground. Terrified homeowners didn’t know what
the blobs were and some thought they were life forms from
a different planet. People around Dallas were worried until
Biologists, or scientists who study living things, put their
minds at ease.
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Monday, March 28, 2016
What is Life Reading pg.2
The blobs were slime molds – living
things usually found on damp,
decaying material on a forest floor.
The unusually wet weather around
Dallas that year provided ideal
conditions for the slime molds to
grow in people’s yards.
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Monday, March 28, 2016
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Monday, March 28, 2016
Characteristics of Living Things pg.3
If you were asked to name some living things, or
organisms, you might name yourself, a pet, and maybe
some insects or plants. But you would probably not
mention a moss growing in a shady spot, the mildew on
bathroom tiles, or a mushroom growing on the lawn. But all
of these things are also organisms.
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Monday, March 28, 2016
Characteristics of Living Things pg.4
All of these organisms share six important characteristics
with all other living things. All living things have a cellular
organization, contain similar chemicals, use energy, grow
and develop, respond to their surroundings, and reproduce.
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Monday, March 28, 2016
Characteristics of Living Things pg.5
One way to remember
the six characteristics
of living things is to use
the word “ROGERS.” Can
you think of another way
to remember the six
characteristics of living
things?
In order for a creature to
be classified as a living
thing, it must demonstrate
all six characteristics.
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Respond to surroundings
Organization (of cells)
Grow and develop
Energy use
Reproduce
Similar chemicals
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Monday, March 28, 2016
Cellular Organization pg.6
All organisms are made of small building blocks called
cells. A cell is the basic unit of structure and function
in an organism. The smallest cells are so tiny that you
could fit over a million of them on the period at the
end of this sentence. To see most cells, you need a
microscope – a tool that uses lenses, like those in
eyeglasses, to magnify small objects.
A million cells could
fit right here!
.
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Monday, March 28, 2016
Cellular Organization pg.7
Organisms may be composed of only one cell or of
many cells.
Unicellular, or single-celled organisms, include
bacteria. Bacteria are the most numerous organisms on
Earth. Each bacterial cell carries out all of the
functions necessary for the organism to stay alive.
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E. Coli bacteria found in
human intestine
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Monday, March 28, 2016
Cellular Organization pg.8
Multicellular organisms are composed of many cells.
The individual cells of many multicellular organisms are
specialized to do certain tasks. For example you are
made of trillions of cells. Specialized cells in your
body, such as muscle cells and nerve cells, work
together to keep you alive. Some nerve cells carry
messages from your surroundings to your brain. Other
nerve cells carry messages to your muscle cells, making
your body move.
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Muscle cells with nerve
cell connections
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Monday, March 28, 2016
Cellular Organization pg.9
Animal Cells
Plant Cells
Like all living things, the butterfly and the leaf are
made of cells. Although the cells of different organisms
are not identical, they share important characteristics.
In what ways are cells similar?
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Monday, March 28, 2016
Chemicals of Life pg.10
The cells of all living things are composed of chemicals.
The most abundant chemical in cells is water. Other
chemicals called carbohydrates (kahr-boh-HY-drayts) are a
cell’s energy source. The two types of carbohydrates are
sugars and starches. Two other chemicals, proteins
(PROH-teenz) and lipids (LIP-idz), are the building materials
of cells. This is similar to the way that wood and bricks
are the building materials of houses.
Lipids are fats (so they can also
insulate the organism) and proteins
control all the chemical reactions
Lipids
that occur in a living thing.
Lipids
Proteins
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Proteins
Proteins
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Monday, March 28, 2016
Chemicals of Life pg.11
Finally, nucleic acids (noo-KLEE-ik) are the genetic
material or DNA. Nucleic acids are the chemical
instructions that direct the cell’s activities.
Some types of organisms have RNA as their genetic
material. This is very similar to DNA, but is a simpler
molecule
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Nucleic Acid
DNA
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Monday, March 28, 2016
This is the end of Part one.
You should have completed side one of
your notes page.
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