NEEDS OF LIVING NEEDS OF LIVING THINGSTHINGS
Four Basic NeedsFour Basic Needs
Living things must satisfy their basic Living things must satisfy their basic needs for energy, water, living space, needs for energy, water, living space, and stable internal conditions.and stable internal conditions.
ENERGYENERGY
Food is an organism’s energy sourceFood is an organism’s energy source Autotroph/producer = make their own foodAutotroph/producer = make their own food Auto = selfAuto = self troph = feedertroph = feeder Heterotrophs/consumers = cannot make Heterotrophs/consumers = cannot make
their own food.their own food. Hetero = otherHetero = other
WATERWATER
Must have H2O to surviveMust have H2O to survive Dissolves more chemicals than any other Dissolves more chemicals than any other
substance on Earthsubstance on Earth 92% of blood is water92% of blood is water Organisms will survive only a few days Organisms will survive only a few days
without H2Owithout H2O
LIVING SPACELIVING SPACE
All organisms need a place to live, obtain All organisms need a place to live, obtain food and H2O, and find shelterfood and H2O, and find shelter
Space on Earth is limited so organisms Space on Earth is limited so organisms must competemust compete
STABLE INTERNAL CONDITIONSSTABLE INTERNAL CONDITIONS
Organisms must keep conditions inside Organisms must keep conditions inside their body stable despite environmental their body stable despite environmental changeschanges
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