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Characteristics of Living
Things
Life Science
Objectives
Be able to determine whether something is a
living thing or a non-living thing.
Learn and understand the 5 main
characteristics of living things. (ROGER)
Organism
A living thing
How do you know when something is living?
There are 5 Characteristics of Living
Things
1. Respond
2. Organization (CELLS)
3. Growth & Development
4. Energy
5. Reproduction
ROGER
R
Respond
Living things respond
to their environment.
Why is Buddy screaming?
Buddy is responding to the face
chewing the bone!
Stimulus: anything that causes a
change in an organism.
Causes the organism to react
Response: a reaction or
change in behavior due
to the stimulus.
A stimulus causes a Response
What is the stimulus here?
Music = stimulus
Dancing = response
Homeostasis: Living things maintain a
stable internal balance
The ability to keep the proper conditions
inside no matter what is going on outside.
ROGER
Organized
Living things are all composed
of cells.
Cells: The basic unit of life that
carries on the life functions.
Organisms can be
1-celled
uni-cellular
Amoeba
bacteria
Are you Uni-celled or Multi-
celled? Multi –celled!
You are made up of many
little cells that are different
types with different jobs
*multi-celled- made
up of different kinds of
cells with different jobs
(specialized cells)
Many celled
multi-celled
Multicellular organisms.
Plants & animals
*multi-celled-
made
up of different
kinds of
cells with different
jobs
(specialized cells)
Living things are organized
All of the little cells that come together to
make up living things do so in a specific
order.
For example a group of muscle cells come
together to form our muscles.
Here are some types of cells in your
body….
Can you guess what type of cells they
are????
White blood cells Red blood cells Cardiac muscle cell
“Basic unit of Life”
1. Unicellular organism:
Bacteria, ameoba
2. Multicellular organism:
many cells. Plants & animals
ROGER
Grow and Develop
Growth: Unicellular organism
increase in cell size.
Multicellular organism increase the
number of cells.
Grow
Growth- get larger in size
Growth and Development Develop- body changes over
time
Development:
•Organisms grow and
become more
complex, they change
physically and in their
abilities
• Ex: walking
Metamorphosis
•body changes over time
The Human Life Cycle
ROGER
Energy
Energy comes directly or indirectly from
Sun.
Heterotrophs: Animals and humans
eat food to obtain their energy.
Consumer (heterotroph)
Eats other organisms for food,
does not make own food
Autotrophs: Plants however use the
sunlight to obtain their energy. Make their
own food.
Producer (autotroph)
Makes own food using
sun’s energy.
The squirrel's cells are able to work
because of the energy he obtained by eating
berries, produced by a plant, using the
energy from the sun.
ROGER
Living Things Reproduce
Living things produce offspring that are
similar to parents:
HYDRA
ReproductionAsexual Reproduction: One cell
(1 parent) divides in half making an
exact copy.
The offspring are identical to
the parent!
ReproductionSexual Reproduction: cells from 2
parents:
egg and sperm.
Offspring are NOT identical to the parents!
There are 5 Characteristics of Living
Things
1. Respond
2. Organization (CELLS)
3. Growth & Development
4. Energy
5. Reproduction
Living or Non-living and Why?
LivingLiving
Living
Non-Living
Non-Living Non-Living
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