Organisms Need…
Subtitle
All Organisms Need…
1.
Food
2.
Water
3.
Air
4.
A place to live
Food
All
organisms need food to live.
Food
provides organisms with
energy and raw materials
needed to carry on life
processes.
Food
 Producers
(autotrophs): organisms that
make their own food. Plants are the
only producers.
 Consumers
(heterotrophs): organisms
that eat other organisms to get energy.
 Decomposers:
organisms (consumers)
that obtain food by breaking down dead
organisms.
Plants make food by
Photosynthesis
 Photosynthesis
is the process of
converting carbon dioxide into sugar by
use of sunlight.
 photo = light
 Synthesis = building
 6CO 2
+ 6H 2O → → → → C 6H 12O 6 + 6O 2
 Carbon
dioxide + water → → → →
glucose + oxygen
Water
 Water
makes 70% of
your body weight.
 We
can only live for 3
days without water.
Air
 Most
organisms require
oxygen to stay alive.
Homeostasis
 The
maintenance of a stable
internal condition. Examples:
 Constant
body temperature
 Constant
sugar level
 Constant
oxygen/carbon dioxide
level
 Homeo
 Stasis
= same
= status