CIENCIAS DE LA NATURALEZA
1º DE E.S.O.
PRIMER TRIMESTRE
FIRST TERM
Chapter 3:
Life on Earth
http://www.ancientlifepublishing.com/
3.1.LIVING ORGANISMS
WHAT IS A LIVING THING?
1) All the organisms in the biosphere are able to perform
three vital functions:
- Nutrition,
- Interaction, and
- Reproduction
Here in you can find more
characteristics of the living organisms.
Make a list and resume all of them in a
few words in your notebook
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3.1.LIVING ORGANISMS
WHAT IS A LIVING THING?
1) The three vital functions:There are two kinds of nutrition:
-AUTOTROPHIC
AND
HETEROTROPHIC
Autotrophs produce their own
food by taking water, CO2 and
mineral substances from the
environment
Heterotrophs obtain their
food by eating other
organisms or their remains
3.1.LIVING ORGANISMS
AUTOTROPHIC NUTRITION
Autotrophs produce their own
food by taking water, CO2 and
mineral substances from the
environment
Photosynthesis
3.1.LIVING ORGANISMS
HETEROTROPHIC NUTRITION
Heterotrophs obtain their
food by eating other
organisms or their remains
Cellular respiration
3.1.LIVING ORGANISMS
In the film “The Lion King” Mufasa explains
to his son Simba how all living things are
connected:
“Antelopes eat the grass, lions eat
antelopes, but when the lions die, their
bodies become food for the grass, and so the
‘circle of life’ goes on….”
Autotrophs and
heterotrophs are closely
related each others
“The Lion King” and its associated characters are
the property of Walt Disney Pictures, Incorporated.
3.1.LIVING ORGANISMS
WHAT IS A LIVING THING?
1) All the organisms in the biosphere are able to perform
three vital functions:
-Interaction: Living organisms are able to sense changes
in their environment and react in order to survive
http://www.clam-arte.com.ar/pintor.gif
3.1.LIVING ORGANISMS
WHAT IS A LIVING THING?
1) All the organisms in the biosphere are able to perform
three vital functions:
-Interaction: Living organisms are able to sense changes
in their environment and react in order to survive
Plants grow towards the light
http://www.youtube.com/
watch?v=Ze8NV7cvW8k
Animals detect food and
move towards it
http://www.youtube.co
m/watch?v=yps7pgq1
TAk&feature=fvsr
3.1.LIVING ORGANISMS
WHAT IS A LIVING THING?
1) All the organisms in the biosphere are able to perform
three vital functions:
- Reproduction: Organisms produce descendants that
maintain their characteristics
3.1.LIVING ORGANISMS
WHAT IS A LIVING THING?
1) Reproduction can be …
Asexual
http://www.youtube.com/watch?v=
gEwzDydciWc&feature=related
Sexual
3.1.LIVING ORGANISMS
WHAT IS A LIVING THING?
2) All the living beings in the biosphere are made up of similar
substances
3.1.LIVING ORGANISMS
WHAT IS A LIVING THING?
2) All the living beings in the biosphere are made up of similar
substances
Water (65-90 %)
3.1.LIVING ORGANISMS
WHAT IS A LIVING THING?
2) All the living beings in the biosphere are made up of similar
substances
Water (65-90 %)
Substances rich in
carbon (10-30 %)
CARBOHIDRATES
LIPIDS
PROTEINS
NUCLEIC
ACIDS
3.1.LIVING ORGANISMS
WHAT IS A LIVING THING?
2) All the living beings in the biosphere are made up of similar
substances
Water (65-90 %)
Substances rich in
carbon (10-30 %)
Mineral substances
(1-5 %)
3.1.LIVING ORGANISMS
WHAT IS A LIVING THING?
3) All the living beings in the biosphere are formed by cells
A cell is the smallest unit
of a living thing capable of
performing the three vital
functions: nutrition,
relation, and reproduction.
http://www.youtube.com/wa
tch?v=hOLAGYmUQV0
3.1.LIVING ORGANISMS
3) All the living beings in the biosphere are formed by cells
Cells were discovered by using a microscope
By Robert
Hooke
(1665)
The first cell
description ever
In a cork